Hoyer, S., Gandolfi, D., Armstrong, D. J., Deleuil, M., Acuna, L., de Medeiros, J. R., Goffo, E., Lillo-Box, J., Delgado Mena, E., Lopez, T. A., Santerne, A., Sousa, S., Fridlund, M., Adibekyan, V, Collins, K. A., Serrano, L. M., Cortes-Zuleta, P., Howell, S. B., Deeg, H., Aguichine, A., Barragan, O., Bryant, E. M., Canto Martins, B. L., Collins, K., I, Cooke, B. F., Diaz, R. F., Esposito, M., Furlan, E., Hojjatpanah, S., Jackman, J., Jenkins, J. M., Jensen, E. L. N., Latham, D. W., Leao, I. C., Matson, R. A., Nielsen, L. D., Osborn, A., Otegi, J. F., Rodler, F., Sabotta, S., Scott, N. J., Seager, S., Stockdale, C., Strom, P. A., Vanderspek, R., Van Eylen, V., Wheatley, P. J., Winn, J. N., Almenara, J. M., Barrado, D., Barros, S. C. C., Bayliss, D., Bouchy, F., Boyd, P. T., Cabrera, J., Cochran, W. D., Demangeon, O., Doty, J. P., Dumusque, X., Figueira, P., Fong, W., Grziwa, S., Hatzes, A. P., Kabath, P., Knudstrup, E., Korth, J., Livingston, J. H., Luque, R., Mousis, O., Mullally, S. E., Osborn, H. P., Palle, E., Persson, C. M., Redfield, S., Santos, N. C., Smith, J., Subjak, J., Twicken, J. D., Udry, S. and Yahalomi, D. A. (2021). TOI-220b: a warm sub-Neptune discovered by TESS. Mon. Not. Roy. Astron. Soc., 505 (3). S. 3361 - 3380. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

In this paper, we report the discovery of TOI-220b, a new sub-Neptune detected by the Transiting Exoplanet Survey Satellite (TESS) and confirmed by radial velocity follow-up observations with the HARPS spectrograph. Based on the combined analysis of TESS transit photometry and high precision radial velocity measurements, we estimate a planetary mass of 13.8 +/- 1.0M(circle plus) and radius of 3.03 +/- 0.15R(circle plus), implying a bulk density of 2.73 +/- 0.47. TOI-220b orbits a relative bright (V=10.4) and old (10.1 +/- 1.4Gyr) K dwarf star with a period of similar to 10.69d. Thus, TOI-220b is a new warm sub-Neptune with very precise mass and radius determinations. A Bayesian analysis of the TOI-220b internal structure indicates that due to the strong irradiation it receives, the low density of this planet could be explained with a steam atmosphere in radiative-convective equilibrium and a supercritical water layer on top of a differentiated interior made of a silicate mantle and a small iron core.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Hoyer, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Armstrong, D. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deleuil, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Acuna, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Medeiros, J. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goffo, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lillo-Box, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Delgado Mena, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lopez, T. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Santerne, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sousa, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Adibekyan, VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Collins, K. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Serrano, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cortes-Zuleta, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Howell, S. B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aguichine, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barragan, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bryant, E. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Canto Martins, B. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Collins, K., IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cooke, B. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Diaz, R. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esposito, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Furlan, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hojjatpanah, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jackman, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jenkins, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jensen, E. L. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Latham, D. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leao, I. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Matson, R. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nielsen, L. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Osborn, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Otegi, J. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rodler, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sabotta, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scott, N. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Seager, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stockdale, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Strom, P. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vanderspek, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wheatley, P. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Winn, J. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Almenara, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barrado, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barros, S. C. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bayliss, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bouchy, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Boyd, P. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, W. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Demangeon, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doty, J. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dumusque, X.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Figueira, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fong, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, A. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kabath, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knudstrup, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Livingston, J. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mousis, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mullally, S. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Osborn, H. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, C. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Santos, N. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Subjak, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Twicken, J. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Udry, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yahalomi, D. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-607864
DOI: 10.1093/mnras/stab1427
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 505
Number: 3
Page Range: S. 3361 - 3380
Date: 2021
Publisher: OXFORD UNIV PRESS
Place of Publication: OXFORD
ISSN: 1365-2966
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
EXTRASOLAR PLANET VALIDATION; POWERED MASS-LOSS; RADIUS DISTRIBUTION; ERROR-CORRECTION; STARS; CORE; EXOPLANETS; VARIABILITY; PARAMETERS; VELOCITIESMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60786

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