Universität zu Köln

Bluhm, P., Luque, R., Espinoza, N., Palle, E., Caballero, J. A., Dreizler, S., Livingston, J. H., Mathur, S., Quirrenbach, A., Stock, S., Van Eylen, V., Nowak, G., Lopez, E., Csizmadia, Sz, Zapatero Osorio, M. R., Schoefer, P., Lillo-Box, J., Oshagh, M., Gonzalez-Alvarez, E., Amado, P. J., Barrado, D., Bejar, V. J. S., Cale, B., Chaturvedi, P., Cifuentes, C., Cochran, W. D., Collins, K. A., Collins, K., I, Cortes-Contreras, M., Diez Alonso, E., El Mufti, M., Ercolino, A., Fridlund, M., Gaidos, E., Garcia, R. A., Georgieva, I, Gonzalez-Cuesta, L., Guerra, P., Hatzes, A. P., Henning, Th, Herrero, E., Hidalgo, D., Isopi, G., Jeffers, S., V, Jenkins, J. M., Jensen, E. L. N., Kabath, P., Kaminski, A., Kemmer, J., Korth, J., Kossakowski, D., Kuerster, M., Lafarga, M., Mallia, F., Montes, D., Morales, J. C., Morales-Calderon, M., Murgas, F., Narita, N., Passegger, V. M., Pedraz, S., Persson, C. M., Plavchan, P., Rauer, H., Redfield, S., Reffert, S., Reiners, A., Ribas, I, Ricker, G. R., Rodriguez-Lopez, C., Santos, A. R. G., Seager, S., Schlecker, M., Schweitzer, A., Shan, Y., Soto, M. G., Subjak, J., Tal-Or, L., Trifonov, T., Vanaverbeke, S., Vanderspek, R., Wittrock, J., Zechmeister, M. and Zohrabi, F. (2020). Precise mass and radius of a transiting super-Earth planet orbiting the M dwarf TOI-1235: a planet in the radius gap? Astron. Astrophys., 639. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

We report the confirmation of a transiting planet around the bright weakly active M0.5V star TOI-1235 (TYC 4384-1735-1, V approximate to 11.5 mag), whose transit signal was detected in the photometric time series of sectors 14, 20, and 21 of the TESS space mission. We confirm the planetary nature of the transit signal, which has a period of 3.44 d, by using precise RV measurements with the CARMENES, HARPS-N, and iSHELL spectrographs, supplemented by high-resolution imaging and ground-based photometry. A comparison of the properties derived for TOI-1235 b with theoretical models reveals that the planet has a rocky composition, with a bulk density slightly higher than that of Earth. In particular, we measure a mass of M-p = 5.9 +/- 0.6 M-circle plus and a radius of R-p = 1.69 +/- 0.08 R-circle plus, which together result in a density of rho(p) = 6.7(-1.1)(+1.3) g cm(-3). When compared with other well-characterized exoplanetary systems, the particular combination of planetary radius and mass places our discovery in the radius gap, which is a transition region between rocky planets and planets with significant atmospheric envelopes. A few examples of planets occupying the radius gap are known to date. While the exact location of the radius gap for M dwarfs is still a matter of debate, our results constrain it to be located at around 1.7 R-circle plus or larger at the insolation levels received by TOI-1235 b (similar to 60 S-circle plus). This makes it an extremely interesting object for further studies of planet formation and atmospheric evolution.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bluhm, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Luque, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Espinoza, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Palle, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Caballero, J. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dreizler, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Livingston, J. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Quirrenbach, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stock, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Van Eylen, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nowak, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lopez, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Csizmadia, Sz UNSPECIFIED UNSPECIFIED UNSPECIFIED Zapatero Osorio, M. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schoefer, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lillo-Box, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Oshagh, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gonzalez-Alvarez, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Amado, P. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barrado, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bejar, V. J. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cale, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chaturvedi, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cifuentes, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cochran, W. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Collins, K. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Collins, K., I UNSPECIFIED UNSPECIFIED UNSPECIFIED Cortes-Contreras, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Diez Alonso, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED El Mufti, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ercolino, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fridlund, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gaidos, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Garcia, R. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Georgieva, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Gonzalez-Cuesta, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guerra, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hatzes, A. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Henning, Th UNSPECIFIED UNSPECIFIED UNSPECIFIED Herrero, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hidalgo, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Isopi, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jeffers, S., V UNSPECIFIED UNSPECIFIED UNSPECIFIED Jenkins, J. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jensen, E. L. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kabath, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kaminski, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kemmer, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Korth, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kossakowski, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kuerster, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lafarga, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mallia, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Montes, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Morales, J. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Morales-Calderon, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Murgas, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Narita, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Passegger, V. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pedraz, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Persson, C. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Plavchan, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rauer, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Redfield, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reffert, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reiners, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ribas, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Ricker, G. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rodriguez-Lopez, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Santos, A. R. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Seager, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlecker, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schweitzer, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Shan, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Soto, M. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Subjak, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tal-Or, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Trifonov, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vanaverbeke, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vanderspek, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wittrock, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zechmeister, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zohrabi, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-325951
DOI:	10.1051/0004-6361/202038160
Journal or Publication Title:	Astron. Astrophys.
Volume:	639
Date:	2020
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	1432-0746
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ERROR-CORRECTION; EXOPLANETS; CATALOG; STELLAR; STARS; VELOCITIES; VALLEY; MODEL; TOOL Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/32595