Barragan, O., Aigrain, S., Kubyshkina, D., Gandolfi, D., Livingston, J., Fridlund, M. C., V, Fossati, L., Korth, J., Parviainen, H., Malavolta, L., Palle, E., Deeg, H. J., Nowak, G., Rajpaul, V. M., Zicher, N., Antoniciello, G., Narita, N., Albrecht, S., Bedin, L. R., Cabrera, J., Cochran, W. D., de Leon, J., Eigmueller, Ph, Fukui, A., Granata, V, Grziwa, S., Guenther, E., Hatzes, A. P., Kusakabe, N., Latham, D. W., Libralato, M., Luque, R., Montanes-Rodriguez, P., Murgas, F., Nardiello, D., Pagano, I, Piotto, G., Persson, C. M., Redfield, S. and Tamura, M. (2019). Radial velocity confirmation of K2-100b: a young, highly irradiated, and low-density transiting hot Neptune. Mon. Not. Roy. Astron. Soc., 490 (1). S. 698 - 709. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We present a detailed analysis of HARPS-N radial velocity observations of K2-100, a young and active star in the Praesepe cluster, which hosts a transiting planet with a period of 1.7 d. We model the activity-induced radial velocity variations of the host star with a multidimensional Gaussian Process framework and detect a planetary signal of 10.6 +/- 3.0 m s(-1), which matches the transit ephemeris, and translates to a planet mass of 21.8 +/- 6.2 M-circle plus. We perform a suite of validation tests to confirm that our detected signal is genuine. This is the first mass measurement for a transiting planet in a young open cluster. The relatively low density of the planet, 2.04(-0.61)(+0.66) g cm(-3), implies that K2-100b retains a significant volatile envelope. We estimate that the planet is losing its atmosphere at a rate of 10(11)-10(12) g s(-1) due to the high level of radiation it receives from its host star.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Barragan, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aigrain, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kubyshkina, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Livingston, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, M. C., VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fossati, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parviainen, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Malavolta, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, H. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nowak, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rajpaul, V. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zicher, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Antoniciello, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Narita, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albrecht, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bedin, L. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, W. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Leon, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eigmueller, PhUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fukui, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Granata, VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, A. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kusakabe, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Latham, D. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Libralato, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Montanes-Rodriguez, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Murgas, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nardiello, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pagano, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Piotto, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, C. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tamura, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-129251
DOI: 10.1093/mnras/stz2569
Journal or Publication Title: Mon. Not. Roy. Astron. Soc.
Volume: 490
Number: 1
Page Range: S. 698 - 709
Date: 2019
Publisher: OXFORD UNIV PRESS
Place of Publication: OXFORD
ISSN: 1365-2966
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
OPEN CLUSTERS; PLANETS; EVOLUTION; PRAESEPE; PHOTOMETRYMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/12925

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