Universität zu Köln

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:	Creators Email ORCID ORCID Put Code Fridlund, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Livingston, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gandolfi, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Persson, C. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lam, K. W. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stassun, K. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hellier, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Korth, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hatzes, A. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Malavolta, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Luque, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Redfield, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guenther, E. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Albrecht, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barragan, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Benatti, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bouma, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cabrera, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cochran, W. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Csizmadia, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dai, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Deeg, H. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Esposito, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Georgieva, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Grziwa, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cuesta, L. Gonzalez UNSPECIFIED UNSPECIFIED UNSPECIFIED Hirano, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jenkins, J. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kabath, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Knudstrup, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Latham, D. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mullally, S. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Narita, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nowak, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Olofsson, A. O. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Palle, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paetzold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pompei, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rauer, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ricker, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rodler, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Seager, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Serrano, L. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Smith, A. M. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Spina, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Subjak, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tenenbaum, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ting, E. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vanderburg, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vanderspek, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Van Eylen, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Villanueva, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Winn, J. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language RADIAL-VELOCITY; SUPER-EARTH; PLANETS; COMPANIONS; EXOPLANETS; DWARFS; MASSES Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31344