Universität zu Köln

Nielsen, L. D., Gandolfi, D., Armstrong, D. J., Jenkins, J. S., Fridlund, M., Santos, N. C., Dai, F., Adibekyan, V, Luque, R., Steffen, J. H., Esposito, M., Meru, F., Sabotta, S., Bolmont, E., Kossakowski, D., Otegi, J. F., Murgas, F., Stalport, M., Rodler, F., Diaz, M. R., Kurtovic, N. T., Ricker, G., Vanderspek, R., Latham, D. W., Seager, S., Winn, J. N., Jenkins, J. M., Allart, R., Almenara, J. M., Barrado, D., Barros, S. C. C., Bayliss, D., Berdinas, Z. M., Boisse, I, Bouchy, F., Boyd, P., Brown, D. J. A., Bryant, E. M., Burke, C., Cochran, W. D., Cooke, B. F., Demangeon, O. D. S., Diaz, R. F., Dittman, J., Dorn, C., Dumusque, X., Garcia, R. A., Gonzalez-Cuesta, L., Grziwa, S., Georgieva, I, Guerrero, N., Hatzes, A. P., Helled, R., Henze, C. E., Hojjatpanah, S., Korth, J., Lam, K. W. F., Lillo-Box, J., Lopez, T. A., Livingston, J., Mathur, S., Mousis, O., Narita, N., Osborn, H. P., Palle, E., Pena Rojas, P. A., Persson, C. M., Quinn, S. N., Rauer, H., Redfield, S., Santerne, A., dos Santos, L. A., Seidel, J., V, Sousa, S. G., Ting, E. B., Turbet, M., Udry, S., Vanderburg, A., Van Eylen, V., Vines, J., I, Wheatley, P. J. and Wilson, P. A. (2020). Mass determinations of the three mini-Neptunes transiting TOI-125. Mon. Not. Roy. Astron. Soc., 492 (4). S. 5399 - 5413. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

The Transiting Exoplanet Survey Satellite, TESS, is currently carrying out an all-sky search for small planets transiting bright stars. In the first year of the TESS survey, a steady progress was made in achieving the mission's primary science goal of establishing bulk densities for 50 planets smaller than Neptune. During that year, the TESS's observations were focused on the southern ecliptic hemisphere, resulting in the discovery of three mini-Neptunes orbiting the star T01-125, a V = 11,0 KO dwarf. We present intensive HARPS radial velocity observations, yielding precise mass measurements for TO1-125b, TOI-125c, and TOI-125d. TOI-125b has an orbital period of 4,65 d, a radius of 2,726 + 0,075 RE, a mass of 9,50 0,88 ME, and is near the 2:1 mean motion resonance with TOI-125c at 9.15 d. TOI-125c has a similar radius of 2,759 0.10 RE and a mass of 6,63 + 0,99 ME, being the puffiest of the three planets. T01-125d has an orbital period of 19,98 d and a radius of 2.93 + 0,17 RE and mass 13,6 1,2 ME, For T01-125b and d, we find unusual high eccentricities of 0.19 0.04 and 0.17+(c):(!,(, respectively. Our analysis also provides upper mass limits for the two low-SNR planet candidates in the system; for T01-125.04 (Rp = 1.36 RE, P = 0.53 d), we find a 2a upper mass limit of 1.6 ME, whereas T01-125.05 (RP = 4.2-'2E44 RE, P = 13.28 d) is unlikely a viable planet candidate with an upper mass limit of 2.7 ME. We discuss the internal structure of the three confirmed planets, as well as dynamical stability and system architecture for this intriguing exoplanet system.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nielsen, L. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gandolfi, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Armstrong, D. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jenkins, J. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fridlund, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Santos, N. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dai, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Adibekyan, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Luque, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Steffen, J. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Esposito, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meru, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sabotta, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bolmont, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kossakowski, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Otegi, J. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Murgas, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stalport, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rodler, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Diaz, M. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kurtovic, N. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ricker, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vanderspek, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Latham, D. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Seager, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Winn, J. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jenkins, J. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Allart, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Almenara, J. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barrado, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barros, S. C. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bayliss, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Berdinas, Z. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Boisse, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Bouchy, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Boyd, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brown, D. J. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bryant, E. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Burke, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cochran, W. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cooke, B. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Demangeon, O. D. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Diaz, R. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dittman, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dorn, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dumusque, X. UNSPECIFIED UNSPECIFIED UNSPECIFIED Garcia, R. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gonzalez-Cuesta, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grziwa, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Georgieva, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Guerrero, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hatzes, A. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Helled, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Henze, C. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hojjatpanah, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Korth, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lam, K. W. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lillo-Box, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lopez, T. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Livingston, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mousis, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Narita, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Osborn, H. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Palle, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pena Rojas, P. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Persson, C. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Quinn, S. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rauer, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Redfield, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Santerne, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED dos Santos, L. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Seidel, J., V UNSPECIFIED UNSPECIFIED UNSPECIFIED Sousa, S. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ting, E. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Turbet, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Udry, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vanderburg, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Van Eylen, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vines, J., I UNSPECIFIED UNSPECIFIED UNSPECIFIED Wheatley, P. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wilson, P. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-343361
DOI:	10.1093/mnras/staa197
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	492
Number:	4
Page Range:	S. 5399 - 5413
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 CHAIN MONTE-CARLO; EQUATION-OF-STATE; SHORT-PERIOD; GIANT; EVOLUTION; PLANETS; STARS; MIGRATION; ROTATION; SYSTEMS Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/34336