Georgieva, I. Y., Persson, C. M., Barragan, O., Nowak, G., Fridlund, M., Locci, D., Palle, E., Luque, R., Carleo, I, Gandolfi, D., Kane, S. R., Korth, J., Stassun, K. G., Livingston, J., Matthews, E. C., Collins, K. A., Howell, S. B., Serrano, L. M., Albrecht, S., Bieryla, A., Brasseur, C. E., Ciardi, D., Cochran, W. D., Colon, K. D., Crossfield, I. J. M., Csizmadia, Sz, Deeg, H. J., Esposito, M., Furlan, E., Gan, T., Goffo, E., Gonzales, E., Grziwa, S., Guenther, E. W., Guerra, P., Hirano, T., Jenkins, J. M., Jensen, E. L. N., Kabath, P., Knudstrup, E., Lam, K. W. F., Latham, D. W., Levine, A. M., Matson, R. A., McDermott, S., Osborne, H. L. M., Paegert, M., Quinn, S. N., Redfield, S., Ricker, G. R., Schlieder, J. E., Scott, N. J., Seager, S., Smith, A. M. S., Tenenbaum, P., Twicken, J. D., Vanderspek, R., Van Eylen, V. and Winn, J. N. (2021). Hot planets around cool stars - two short-period mini-Neptunes transiting the late K-dwarf TOI-1260. Mon. Not. Roy. Astron. Soc., 505 (4). S. 4684 - 4702. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We present the discovery and characterization of two sub-Neptunes in close orbits, as well as a tentative outer planet of a similar size, orbiting TOI-1260 - a low metallicity K6V dwarf star. Photometry from Transiting Exoplanet Survey Satellite(TESS) yields radii of R-b = 2.33 +/- 0.10 and R-c = 2.82 +/- 0.15 R-circle plus, and periods of 3.13 and 7.49 d for TOI-1260b and TOI-1260c, respectively. We combined the TESS data with a series of ground-based follow-up observations to characterize the planetary system. From HARPS-N high-precision radial velocities we obtain M-b = and M-c = M-circle plus. The star is moderately active with a complex activity pattern, which necessitated the use of Gaussian process regression for both the light-curve detrending and the radial velocity modelling, in the latter case guided by suitable activity indicators. We successfully disentangle the stellar-induced signal from the planetary signals, underlining the importance and usefulness of the Gaussian process approach. We test the system's stability against atmospheric photoevaporation and find that the TOI-1260 planets are classic examples of the structure and composition ambiguity typical for the 2-3 R-circle plus range.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Georgieva, I. Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, C. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barragan, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nowak, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Locci, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carleo, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kane, S. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stassun, K. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Livingston, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Matthews, E. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Collins, K. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Howell, S. B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Serrano, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albrecht, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bieryla, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brasseur, C. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ciardi, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, W. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Colon, K. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crossfield, I. J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csizmadia, SzUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, H. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esposito, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Furlan, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gan, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goffo, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gonzales, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, E. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guerra, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hirano, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jenkins, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jensen, E. L. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kabath, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knudstrup, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lam, K. W. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Latham, D. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Levine, A. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Matson, R. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McDermott, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Osborne, H. L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paegert, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Quinn, S. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ricker, G. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schlieder, J. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scott, N. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Seager, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, A. M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tenenbaum, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Twicken, J. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vanderspek, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Winn, J. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-607651
DOI: 10.1093/mnras/stab1464
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 505
Number: 4
Page Range: S. 4684 - 4702
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
M-CIRCLE-PLUS; RADIAL-VELOCITY; SUPER-EARTH; ATMOSPHERES; MASS; SPECTROSCOPY; EXOPLANETS; MODELS; TOOL; AGEMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60765

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