Hidalgo, D., Palle, E., Alonso, R., Gandolfi, D., Fridlund, M., Nowak, G., Luque, R., Hirano, T., Justesen, A. B., Cochran, W. D., Barragan, O., Spina, L., Rodler, F., Albrecht, S., Anderson, D., Amado, P., Bryant, E., Caballero, J. A., Cabrera, J., Csizmadia, Sz., Dai, F., De Leon, J., Deeg, H. J., Eigmuller, Ph., Endl, M., Erikson, A., Esposito, M., Figueira, P., Georgieva, I., Grziwa, S., Guenther, E., Hatzes, A. P., Hjorth, M., Hoeijmakers, H. J., Kabath, P., Korth, J., Kuzuhara, M., Lafarga, M., Lampon, M., Leao, I. C., Livingston, J., Mathur, S., Montanes-Rodriguez, P., Morales, J. C., Murgas, F., Nagel, E., Narita, N., Nielsen, L. D., Patzold, M., Persson, C. M., Prieto-Arranz, J., Quirrenbach, A., Rauer, H., Redfield, S., Reiners, A., Ribas, I., Smith, A. M. S., Subjak, J., Van Eylen, V. and Wilson, P. A. (2020). Three planets transiting the evolved star EPIC 249893012: a hot 8.8-M-circle plus super-Earth and two warm 14.7 and 10.2-M-circle plus sub-Neptunes. Astron. Astrophys., 636. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

Full text not available from this repository.

Abstract

We report the discovery of a new planetary system with three transiting planets, one super-Earth and two sub-Neptunes, that orbit EPIC 249893012, a G8 IV-V evolved star ( M ? = 1.05 0.05 M fi, R ? = 1.71 0.04 R fi, Te ff = 5430 85 K). The star is just leaving the main sequence. We combined K2 photometry with IRCS adaptive-optics imaging and HARPS, HARPS-N, and CARMENES highprecision radial velocity measurements to confirm the planetary system, determine the stellar parameters, and measure radii, masses, and densities of the three planets. With an orbital period of 3:5949+0:0007 0:0007 days, a mass of 8:75+1:09 1:08 M , and a radius of 1:95+0:09 0:08 R , the inner planet b is compatible with nickel-iron core and a silicate mantle ( b = 6:39+1:19 1:04 g cm 3). Planets c and d with orbital periods of 15:624+0:001 0:001 and 35:747+0:005 0:005 days, respectively, have masses and radii of 14:67+1;84 1:89 M and 3:67+0:17 0:14 R and 10:18+2:46 2:42 M and 3:94+0:13 0:12 R , respectively, yielding a mean density of 1:62+0:30 0:29 and 0:91+0:25 0:23 g cm 3, respectively. The radius of planet b lies in the transition region between rocky and gaseous planets, but its density is consistent with a rocky composition. Its semimajor axis and the corresponding photoevaporation levels to which the planet has been exposed might explain its measured density today. In contrast, the densities and semimajor axes of planets c and d suggest a very thick atmosphere. The singularity of this system, which orbits a slightly evolved star that is just leaving the main sequence, makes it a good candidate for a deeper study from a dynamical point of view.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Hidalgo, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Alonso, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nowak, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hirano, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Justesen, A. B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, W. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barragan, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spina, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rodler, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albrecht, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Anderson, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Amado, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bryant, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caballero, J. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csizmadia, Sz.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dai, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
De Leon, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, H. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eigmuller, Ph.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Endl, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Erikson, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esposito, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Figueira, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Georgieva, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, A. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hjorth, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hoeijmakers, H. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kabath, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kuzuhara, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lafarga, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lampon, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leao, I. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Livingston, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Montanes-Rodriguez, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Morales, J. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Murgas, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nagel, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Narita, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nielsen, L. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Patzold, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, C. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Prieto-Arranz, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Quirrenbach, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rauer, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Reiners, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ribas, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, A. M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Subjak, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wilson, P. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-336519
DOI: 10.1051/0004-6361/201937080
Journal or Publication Title: Astron. Astrophys.
Volume: 636
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:
KeywordsLanguage
RADIAL-VELOCITY; MASS; SPECTROGRAPH; PHOTOMETRY; MAGNITUDE; SEARCHMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/33651

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item