TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906

A. Tuson; D. Queloz; H. P. Osborn; T. G. Wilson; M. J. Hooton; M. Beck; M. Lendl; G. Olofsson; A. Fortier; A. Bonfanti; A. Brandeker; L. A. Buchhave; A. Collier Cameron; D. R. Ciardi; K. A. Collins; D. Gandolfi; Z. Garai; S. Giacalone; J. Gomes da Silva; S. B. Howell; J. A. Patel; C. M. Persson; L. M. Serrano; S. G. Sousa; S. Ulmer-Moll; A. Vanderburg; C. Ziegler; Y. Alibert; R. Alonso; G. Anglada; T. Bárczy; D. Barrado Navascues; S. C.C. Barros; W. Baumjohann; T. Beck; W. Benz; N. Billot; X. Bonfils; L. Borsato; C. Broeg; J. Cabrera; S. Charnoz; D. M. Conti; Sz Csizmadia; P. E. Cubillos; M. B. Davies; M. Deleuil; L. Delrez; O. D.S. Demangeon; B. O. Demory; D. Dragomir; C. D. Dressing; D. Ehrenreich; A. Erikson; Z. Essack; J. Farinato; L. Fossati; M. Fridlund; E. Furlan; H. Gill; M. Gillon; C. L. Gnilka; E. Gonzales; M. Güdel; M. N. Günther; S. Hoyer; K. G. Isaak; J. M. Jenkins; L. L. Kiss; J. Laskar; D. W. Latham; N. Law; A. Lecavelier des Etangs; G. Lo Curto; C. Lovis; R. Luque; D. Magrin; A. W. Mann; P. F.L. Maxted; M. Mayor; S. McDermott; M. Mecina; C. Mordasini; A. Mortier; V. Nascimbeni; R. Ottensamer; I. Pagano; E. Pallé; G. Peter; G. Piotto; D. Pollacco; T. Pritchard; R. Ragazzoni; N. Rando; F. Ratti; H. Rauer; I. Ribas; G. R. Ricker; M. Rieder; N. C. Santos; A. B. Savel; G. Scandariato; R. P. Schwarz; S. Seager; D. Ségransan; A. Shporer; A. E. Simon; A. M.S. Smith; M. Steller; C. Stockdale; Gy M. Szabó; N. Thomas; G. Torres; R. Tronsgaard; S. Udry; B. Ulmer; V. Van Grootel; R. Vanderspek; J. Venturini; N. A. Walton; J. N. Winn; B. Wohler

doi:10.1093/mnras/stad1369

TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906

A. Tuson, D. Queloz, H. P. Osborn, T. G. Wilson, M. J. Hooton, M. Beck, M. Lendl, G. Olofsson, A. Fortier, A. Bonfanti, A. Brandeker, L. A. Buchhave, A. Collier Cameron, D. R. Ciardi, K. A. Collins, D. Gandolfi, Z. Garai, S. Giacalone, J. Gomes da Silva, S. B. HowellJ. A. Patel, C. M. Persson, L. M. Serrano, S. G. Sousa, S. Ulmer-Moll, A. Vanderburg, C. Ziegler, Y. Alibert, R. Alonso, G. Anglada, T. Bárczy, D. Barrado Navascues, S. C.C. Barros, W. Baumjohann, T. Beck, W. Benz, N. Billot, X. Bonfils, L. Borsato, C. Broeg, J. Cabrera, S. Charnoz, D. M. Conti, Sz Csizmadia, P. E. Cubillos, M. B. Davies, M. Deleuil, L. Delrez, O. D.S. Demangeon, B. O. Demory, D. Dragomir, C. D. Dressing, D. Ehrenreich, A. Erikson, Z. Essack, J. Farinato, L. Fossati, M. Fridlund, E. Furlan, H. Gill, M. Gillon, C. L. Gnilka, E. Gonzales, M. Güdel, M. N. Günther, S. Hoyer, K. G. Isaak, J. M. Jenkins, L. L. Kiss, J. Laskar, D. W. Latham, N. Law, A. Lecavelier des Etangs, G. Lo Curto, C. Lovis, R. Luque, D. Magrin, A. W. Mann, P. F.L. Maxted, M. Mayor, S. McDermott, M. Mecina, C. Mordasini, A. Mortier, V. Nascimbeni, R. Ottensamer, I. Pagano, E. Pallé, G. Peter, G. Piotto, D. Pollacco, T. Pritchard, R. Ragazzoni, N. Rando, F. Ratti, H. Rauer, I. Ribas, G. R. Ricker, M. Rieder, N. C. Santos, A. B. Savel, G. Scandariato, R. P. Schwarz, S. Seager, D. Ségransan, A. Shporer, A. E. Simon, A. M.S. Smith, M. Steller, C. Stockdale, Gy M. Szabó, N. Thomas, G. Torres, R. Tronsgaard, S. Udry, B. Ulmer, V. Van Grootel, R. Vanderspek, J. Venturini, N. A. Walton, J. N. Winn, B. Wohler

Physics and Astronomy

Producción científica: Article › revisión exhaustiva

Resumen

Two warm sub-Neptunes have been discovered orbiting the bright K-dwarf star HD 15906. These planets were observed by the Transiting Exoplanet Survey Satellite (TESS). The inner planet, HD 15906 b, has a confirmed orbit, but the outer planet, HD 15906 c, had ambiguous data, requiring additional observations from the CHaracterising ExOPlanet Satellite (CHEOPS). Results show that HD 15906 b orbits every roughly 10.92 days and HD 15906 c every approximately 21.58 days. The temperatures of the planets are estimated to be 668 K and 532 K, respectively. This system is unique as it's one of only six known with two warm sub-Neptune planets orbiting a bright star and offers a prime opportunity for further study on planet composition and formation theories.

Idioma original	English
Páginas (desde-hasta)	3090-3118
Número de páginas	29
Publicación	Monthly Notices of the Royal Astronomical Society
Volumen	523
N.º	2
DOI	https://doi.org/10.1093/mnras/stad1369
Estado	Published - ago 1 2023

ASJC Scopus Subject Areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stad1369

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Tuson, A., Queloz, D., Osborn, H. P., Wilson, T. G., Hooton, M. J., Beck, M., Lendl, M., Olofsson, G., Fortier, A., Bonfanti, A., Brandeker, A., Buchhave, L. A., Cameron, A. C., Ciardi, D. R., Collins, K. A., Gandolfi, D., Garai, Z., Giacalone, S., da Silva, J. G., ... Wohler, B. (2023). TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906. Monthly Notices of the Royal Astronomical Society, 523(2), 3090-3118. https://doi.org/10.1093/mnras/stad1369

Tuson, A, Queloz, D, Osborn, HP, Wilson, TG, Hooton, MJ, Beck, M, Lendl, M, Olofsson, G, Fortier, A, Bonfanti, A, Brandeker, A, Buchhave, LA, Cameron, AC, Ciardi, DR, Collins, KA, Gandolfi, D, Garai, Z, Giacalone, S, da Silva, JG, Howell, SB, Patel, JA, Persson, CM, Serrano, LM, Sousa, SG, Ulmer-Moll, S, Vanderburg, A, Ziegler, C, Alibert, Y, Alonso, R, Anglada, G, Bárczy, T, Navascues, DB, Barros, SCC, Baumjohann, W, Beck, T, Benz, W, Billot, N, Bonfils, X, Borsato, L, Broeg, C, Cabrera, J, Charnoz, S, Conti, DM, Csizmadia, S, Cubillos, PE, Davies, MB, Deleuil, M, Delrez, L, Demangeon, ODS, Demory, BO, Dragomir, D, Dressing, CD, Ehrenreich, D, Erikson, A, Essack, Z, Farinato, J, Fossati, L, Fridlund, M, Furlan, E, Gill, H, Gillon, M, Gnilka, CL, Gonzales, E, Güdel, M, Günther, MN, Hoyer, S, Isaak, KG, Jenkins, JM, Kiss, LL, Laskar, J, Latham, DW, Law, N, des Etangs, AL, Curto, GL, Lovis, C, Luque, R, Magrin, D, Mann, AW, Maxted, PFL, Mayor, M, McDermott, S, Mecina, M, Mordasini, C, Mortier, A, Nascimbeni, V, Ottensamer, R, Pagano, I, Pallé, E, Peter, G, Piotto, G, Pollacco, D, Pritchard, T, Ragazzoni, R, Rando, N, Ratti, F, Rauer, H, Ribas, I, Ricker, GR, Rieder, M, Santos, NC, Savel, AB, Scandariato, G, Schwarz, RP, Seager, S, Ségransan, D, Shporer, A, Simon, AE, Smith, AMS, Steller, M, Stockdale, C, Szabó, GM, Thomas, N, Torres, G, Tronsgaard, R, Udry, S, Ulmer, B, Van Grootel, V, Vanderspek, R, Venturini, J, Walton, NA, Winn, JN & Wohler, B 2023, 'TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906', Monthly Notices of the Royal Astronomical Society, vol. 523, n.º 2, pp. 3090-3118. https://doi.org/10.1093/mnras/stad1369

@article{c0887dd00e5b42bc8504abf257192926,

title = "TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906",

abstract = "Two warm sub-Neptunes have been discovered orbiting the bright K-dwarf star HD 15906. These planets were observed by the Transiting Exoplanet Survey Satellite (TESS). The inner planet, HD 15906 b, has a confirmed orbit, but the outer planet, HD 15906 c, had ambiguous data, requiring additional observations from the CHaracterising ExOPlanet Satellite (CHEOPS). Results show that HD 15906 b orbits every roughly 10.92 days and HD 15906 c every approximately 21.58 days. The temperatures of the planets are estimated to be 668 K and 532 K, respectively. This system is unique as it's one of only six known with two warm sub-Neptune planets orbiting a bright star and offers a prime opportunity for further study on planet composition and formation theories.",

keywords = "planets and satellites: detection, planets and satellites: fundamental parameters, stars: fundamental parameters, stars: individual: HD 15906 (TOI 461, TIC 4646810), techniques: photometric",

author = "A. Tuson and D. Queloz and Osborn, {H. P.} and Wilson, {T. G.} and Hooton, {M. J.} and M. Beck and M. Lendl and G. Olofsson and A. Fortier and A. Bonfanti and A. Brandeker and Buchhave, {L. A.} and Cameron, {A. Collier} and Ciardi, {D. R.} and Collins, {K. A.} and D. Gandolfi and Z. Garai and S. Giacalone and {da Silva}, {J. Gomes} and Howell, {S. B.} and Patel, {J. A.} and Persson, {C. M.} and Serrano, {L. M.} and Sousa, {S. G.} and S. Ulmer-Moll and A. Vanderburg and C. Ziegler and Y. Alibert and R. Alonso and G. Anglada and T. B{\'a}rczy and Navascues, {D. Barrado} and Barros, {S. C.C.} and W. Baumjohann and T. Beck and W. Benz and N. Billot and X. Bonfils and L. Borsato and C. Broeg and J. Cabrera and S. Charnoz and Conti, {D. M.} and Sz Csizmadia and Cubillos, {P. E.} and Davies, {M. B.} and M. Deleuil and L. Delrez and Demangeon, {O. D.S.} and Demory, {B. O.} and D. Dragomir and Dressing, {C. D.} and D. Ehrenreich and A. Erikson and Z. Essack and J. Farinato and L. Fossati and M. Fridlund and E. Furlan and H. Gill and M. Gillon and Gnilka, {C. L.} and E. Gonzales and M. G{\"u}del and G{\"u}nther, {M. N.} and S. Hoyer and Isaak, {K. G.} and Jenkins, {J. M.} and Kiss, {L. L.} and J. Laskar and Latham, {D. W.} and N. Law and {des Etangs}, {A. Lecavelier} and Curto, {G. Lo} and C. Lovis and R. Luque and D. Magrin and Mann, {A. W.} and Maxted, {P. F.L.} and M. Mayor and S. McDermott and M. Mecina and C. Mordasini and A. Mortier and V. Nascimbeni and R. Ottensamer and I. Pagano and E. Pall{\'e} and G. Peter and G. Piotto and D. Pollacco and T. Pritchard and R. Ragazzoni and N. Rando and F. Ratti and H. Rauer and I. Ribas and Ricker, {G. R.} and M. Rieder and Santos, {N. C.} and Savel, {A. B.} and G. Scandariato and Schwarz, {R. P.} and S. Seager and D. S{\'e}gransan and A. Shporer and Simon, {A. E.} and Smith, {A. M.S.} and M. Steller and C. Stockdale and Szab{\'o}, {Gy M.} and N. Thomas and G. Torres and R. Tronsgaard and S. Udry and B. Ulmer and {Van Grootel}, V. and R. Vanderspek and J. Venturini and Walton, {N. A.} and Winn, {J. N.} and B. Wohler",

note = "Funding Information: Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Funding Information: This paper utilizes data collected at Lick Observatory and analysed using funds provided by the NASA Exoplanets Research Program (XRP) through grant 80NSSC20K0250 (PI: Courtney D. Dressing). Funding Information: The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen{\textquoteright}s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under Grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation Grant No. AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation Funding Information: The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions. The National Geographic Society – Palomar Observatory Sky Atlas (POSS-I) was made by the California Institute of Technology with grants from the National Geographic Society. The Oschin Schmidt Telescope is operated by the California Institute of Technology and Palomar Observatory. The UK Schmidt Telescope was operated by the Royal Observatory Edinburgh, with funding from the UK Science and Engineering Research Council (later the UK Particle Physics and Astronomy Research Council), until 1988 June, and thereafter by the Anglo-Australian Observatory. The blue plates of the southern Sky Atlas and its Equatorial Extension (together known as the SERC-J), as well as the Equatorial Red (ER), and the Second Epoch [red] Survey (SES) were all taken with the UK Schmidt. Funding Information: This work has made use of data from the ESA mission Gaia ( https://www.cosmos.esa.int/gaia ), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium ). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Funding Information: This paper includes data collected by the TESS mission that are publicly available from the Mikulski Archive for Space Telescopes (MAST). Funding for the TESS mission is provided by NASA{\textquoteright}s Science Mission Directorate. We acknowledge the use of public TESS data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. This research has also made use of the Exoplanet Follow-up Observation Program website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Funding Information: Some of the observations in the paper made use of the High-Resolution Imaging instrument {\textquoteleft}Alopeke obtained under Gemini LLP Proposal Number: GN/S-2021A-LP-105. {\textquoteleft}Alopeke was funded by the NASA Exoplanet Exploration Program and built at the NASA Ames Research Center by Steve B. Howell, Nic Scott, Elliott P. Horch, and Emmett Quigley. Alopeke was mounted on the Gemini North (and/or South) telescope of the international Gemini Observatory, a program of NSF{\textquoteright}s OIR Lab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. on behalf of the Gemini partnership: the National Science Foundation (United States), National Research Council (Canada), Agencia Nacional de Investigaci{\'o}n y Desarrollo (Chile), Ministerio de Ciencia, Tecnolog{\'i}a e Innovaci{\'o}n (Argentina), Minist{\'e}rio da Ci{\^e}ncia, Tecnologia, Inova{\c c}{\~o}es e Comunica{\c c}{\~o}es (Brazil), and Korea Astronomy and Space Science Institute (Republic of Korea). Funding Information: This work makes use of observations from the LCOGT network. Part of the LCOGT telescope time was granted by NOIRLab through the Mid-Scale Innovations Program (MSIP). MSIP is funded by NSF. This research has made use of the Exoplanet Follow-up Observation Program (ExoFOP; DOI: 10.26134/ExoFOP5) website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Publisher Copyright: {\textcopyright} 2023 The Author(s).",

year = "2023",

month = aug,

day = "1",

doi = "10.1093/mnras/stad1369",

language = "English",

volume = "523",

pages = "3090--3118",

number = "2",

}

TY - JOUR

T1 - TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906

AU - Tuson, A.

AU - Queloz, D.

AU - Osborn, H. P.

AU - Wilson, T. G.

AU - Hooton, M. J.

AU - Beck, M.

AU - Lendl, M.

AU - Olofsson, G.

AU - Fortier, A.

AU - Bonfanti, A.

AU - Brandeker, A.

AU - Buchhave, L. A.

AU - Cameron, A. Collier

AU - Ciardi, D. R.

AU - Collins, K. A.

AU - Gandolfi, D.

AU - Garai, Z.

AU - Giacalone, S.

AU - da Silva, J. Gomes

AU - Howell, S. B.

AU - Patel, J. A.

AU - Persson, C. M.

AU - Serrano, L. M.

AU - Sousa, S. G.

AU - Ulmer-Moll, S.

AU - Vanderburg, A.

AU - Ziegler, C.

AU - Alibert, Y.

AU - Alonso, R.

AU - Anglada, G.

AU - Bárczy, T.

AU - Navascues, D. Barrado

AU - Barros, S. C.C.

AU - Baumjohann, W.

AU - Beck, T.

AU - Benz, W.

AU - Billot, N.

AU - Bonfils, X.

AU - Borsato, L.

AU - Broeg, C.

AU - Cabrera, J.

AU - Charnoz, S.

AU - Conti, D. M.

AU - Csizmadia, Sz

AU - Cubillos, P. E.

AU - Davies, M. B.

AU - Deleuil, M.

AU - Delrez, L.

AU - Demangeon, O. D.S.

AU - Demory, B. O.

AU - Dragomir, D.

AU - Dressing, C. D.

AU - Ehrenreich, D.

AU - Erikson, A.

AU - Essack, Z.

AU - Farinato, J.

AU - Fossati, L.

AU - Fridlund, M.

AU - Furlan, E.

AU - Gill, H.

AU - Gillon, M.

AU - Gnilka, C. L.

AU - Gonzales, E.

AU - Güdel, M.

AU - Günther, M. N.

AU - Hoyer, S.

AU - Isaak, K. G.

AU - Jenkins, J. M.

AU - Kiss, L. L.

AU - Laskar, J.

AU - Latham, D. W.

AU - Law, N.

AU - des Etangs, A. Lecavelier

AU - Curto, G. Lo

AU - Lovis, C.

AU - Luque, R.

AU - Magrin, D.

AU - Mann, A. W.

AU - Maxted, P. F.L.

AU - Mayor, M.

AU - McDermott, S.

AU - Mecina, M.

AU - Mordasini, C.

AU - Mortier, A.

AU - Nascimbeni, V.

AU - Ottensamer, R.

AU - Pagano, I.

AU - Pallé, E.

AU - Peter, G.

AU - Piotto, G.

AU - Pollacco, D.

AU - Pritchard, T.

AU - Ragazzoni, R.

AU - Rando, N.

AU - Ratti, F.

AU - Rauer, H.

AU - Ribas, I.

AU - Ricker, G. R.

AU - Rieder, M.

AU - Santos, N. C.

AU - Savel, A. B.

AU - Scandariato, G.

AU - Schwarz, R. P.

AU - Seager, S.

AU - Ségransan, D.

AU - Shporer, A.

AU - Simon, A. E.

AU - Smith, A. M.S.

AU - Steller, M.

AU - Stockdale, C.

AU - Szabó, Gy M.

AU - Thomas, N.

AU - Torres, G.

AU - Tronsgaard, R.

AU - Udry, S.

AU - Ulmer, B.

AU - Van Grootel, V.

AU - Vanderspek, R.

AU - Venturini, J.

AU - Walton, N. A.

AU - Winn, J. N.

AU - Wohler, B.

N1 - Funding Information: Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Funding Information: This paper utilizes data collected at Lick Observatory and analysed using funds provided by the NASA Exoplanets Research Program (XRP) through grant 80NSSC20K0250 (PI: Courtney D. Dressing). Funding Information: The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen’s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under Grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation Grant No. AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation Funding Information: The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions. The National Geographic Society – Palomar Observatory Sky Atlas (POSS-I) was made by the California Institute of Technology with grants from the National Geographic Society. The Oschin Schmidt Telescope is operated by the California Institute of Technology and Palomar Observatory. The UK Schmidt Telescope was operated by the Royal Observatory Edinburgh, with funding from the UK Science and Engineering Research Council (later the UK Particle Physics and Astronomy Research Council), until 1988 June, and thereafter by the Anglo-Australian Observatory. The blue plates of the southern Sky Atlas and its Equatorial Extension (together known as the SERC-J), as well as the Equatorial Red (ER), and the Second Epoch [red] Survey (SES) were all taken with the UK Schmidt. Funding Information: This work has made use of data from the ESA mission Gaia ( https://www.cosmos.esa.int/gaia ), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium ). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Funding Information: This paper includes data collected by the TESS mission that are publicly available from the Mikulski Archive for Space Telescopes (MAST). Funding for the TESS mission is provided by NASA’s Science Mission Directorate. We acknowledge the use of public TESS data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. This research has also made use of the Exoplanet Follow-up Observation Program website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Funding Information: Some of the observations in the paper made use of the High-Resolution Imaging instrument ‘Alopeke obtained under Gemini LLP Proposal Number: GN/S-2021A-LP-105. ‘Alopeke was funded by the NASA Exoplanet Exploration Program and built at the NASA Ames Research Center by Steve B. Howell, Nic Scott, Elliott P. Horch, and Emmett Quigley. Alopeke was mounted on the Gemini North (and/or South) telescope of the international Gemini Observatory, a program of NSF’s OIR Lab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. on behalf of the Gemini partnership: the National Science Foundation (United States), National Research Council (Canada), Agencia Nacional de Investigación y Desarrollo (Chile), Ministerio de Ciencia, Tecnología e Innovación (Argentina), Ministério da Ciência, Tecnologia, Inovações e Comunicações (Brazil), and Korea Astronomy and Space Science Institute (Republic of Korea). Funding Information: This work makes use of observations from the LCOGT network. Part of the LCOGT telescope time was granted by NOIRLab through the Mid-Scale Innovations Program (MSIP). MSIP is funded by NSF. This research has made use of the Exoplanet Follow-up Observation Program (ExoFOP; DOI: 10.26134/ExoFOP5) website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Publisher Copyright: © 2023 The Author(s).

PY - 2023/8/1

Y1 - 2023/8/1

N2 - Two warm sub-Neptunes have been discovered orbiting the bright K-dwarf star HD 15906. These planets were observed by the Transiting Exoplanet Survey Satellite (TESS). The inner planet, HD 15906 b, has a confirmed orbit, but the outer planet, HD 15906 c, had ambiguous data, requiring additional observations from the CHaracterising ExOPlanet Satellite (CHEOPS). Results show that HD 15906 b orbits every roughly 10.92 days and HD 15906 c every approximately 21.58 days. The temperatures of the planets are estimated to be 668 K and 532 K, respectively. This system is unique as it's one of only six known with two warm sub-Neptune planets orbiting a bright star and offers a prime opportunity for further study on planet composition and formation theories.

AB - Two warm sub-Neptunes have been discovered orbiting the bright K-dwarf star HD 15906. These planets were observed by the Transiting Exoplanet Survey Satellite (TESS). The inner planet, HD 15906 b, has a confirmed orbit, but the outer planet, HD 15906 c, had ambiguous data, requiring additional observations from the CHaracterising ExOPlanet Satellite (CHEOPS). Results show that HD 15906 b orbits every roughly 10.92 days and HD 15906 c every approximately 21.58 days. The temperatures of the planets are estimated to be 668 K and 532 K, respectively. This system is unique as it's one of only six known with two warm sub-Neptune planets orbiting a bright star and offers a prime opportunity for further study on planet composition and formation theories.

KW - planets and satellites: detection

KW - planets and satellites: fundamental parameters

KW - stars: fundamental parameters

KW - stars: individual: HD 15906 (TOI 461, TIC 4646810)

KW - techniques: photometric

UR - http://www.scopus.com/inward/record.url?scp=85162781287&partnerID=8YFLogxK

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U2 - 10.1093/mnras/stad1369

DO - 10.1093/mnras/stad1369

M3 - Article

AN - SCOPUS:85162781287

SN - 0035-8711

VL - 523

SP - 3090

EP - 3118

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -