Fridlund, M., Livingston, J., Gandolfi, D., Persson, C. M., Lam, K. W. F., Stassun, K. G., Hellier, C., Korth, J., Hatzes, A. P., Malavolta, L., Luque, R., Redfield, S., Guenther, E. W., Albrecht, S., Barragan, O., Benatti, S., Bouma, L., Cabrera, J., Cochran, W. D., Csizmadia, S., Dai, F., Deeg, H. J., Esposito, M., Georgieva, I, Grziwa, S., Cuesta, L. Gonzalez, Hirano, T., Jenkins, J. M., Kabath, P., Knudstrup, E., Latham, D. W., Mathur, S., Mullally, S. E., Narita, N., Nowak, G., Olofsson, A. O. H., Palle, E., Paetzold, M., Pompei, E., Rauer, H., Ricker, G., Rodler, F., Seager, S., Serrano, L. M., Smith, A. M. S., Spina, L., Subjak, J., Tenenbaum, P., Ting, E. B., Vanderburg, A., Vanderspek, R., Van Eylen, V., Villanueva, S. and Winn, J. N. (2020). The TOI-763 system: sub-Neptunes orbiting a Sun-like star. Mon. Not. Roy. Astron. Soc., 498 (3). S. 4503 - 4518. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of P-b = 5.6 d, a mass of M-b = 9.8 +/- 0.8M(circle dot), and a radius of R-b = 2.37 +/- 0.10 R-circle dot. The second transiting planet, TOI-763 c, has an orbital period of P-c = 12.3 d, a mass of M-c = 9.3 +/- 1.0M(circle plus), and a radius of R-c = 2.87 +/- 0.11 R-circle plus. We find the outermost planet candidate to orbit the star with a period of similar to 48 d. If confirmed as a planet, it would have a minimum mass of M-d = 9.5 +/- 1.6M(circle plus). We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Fridlund, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Livingston, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, C. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lam, K. W. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stassun, K. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hellier, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, A. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Malavolta, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, E. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albrecht, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barragan, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benatti, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bouma, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, W. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csizmadia, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dai, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, H. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esposito, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Georgieva, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cuesta, L. GonzalezUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hirano, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jenkins, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kabath, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knudstrup, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Latham, D. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mullally, S. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Narita, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nowak, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Olofsson, A. O. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paetzold, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pompei, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rauer, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ricker, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rodler, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Seager, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Serrano, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, A. M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spina, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Subjak, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tenenbaum, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ting, E. B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vanderburg, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vanderspek, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Villanueva, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Winn, J. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-313440
DOI: 10.1093/mnras/staa2502
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 498
Number: 3
Page Range: S. 4503 - 4518
Date: 2020
Publisher: OXFORD UNIV PRESS
Place of Publication: OXFORD
ISSN: 1365-2966
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
RADIAL-VELOCITY; SUPER-EARTH; PLANETS; COMPANIONS; EXOPLANETS; DWARFS; MASSESMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/31344

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