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Radial velocity confirmation of K2-100b: a young, highly irradiated, and low-density transiting hot Neptune

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Oxford University Press (OUP) 490:1 (2019) 698-708

Authors:

O Barragan, S Aigrain, D Kubyshkina, D Gandolfi, J Livingston, MCV Fridlund, L Fossati, J Korth, H Parviainen, L Malavolta, E Palle, HJ Deeg, G Nowak, VM Rajpaul, N Zicher, G Antoniciello, N Narita, S Albrecht, LR Bedin, J Cabrera, WD Cochran, J de Leon, Ph Eigmueller, A Fukui, V Granata, S Grziwa, E Guenther, AP Hatzes, N Kusakabe, DW Latham, M Libralato, R Luque, P Montanes-Rodriguez, F Murgas, D Nardiello, I Pagano, G Piotto, CM Persson, S Redfield, M Tamura

Abstract:

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society 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. 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+−006661 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 1011–1012 g s−1 due to the high level of radiation it receives from its host star.
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Radial velocity confirmation of K2-100b: a young, highly irradiated, and low density transiting hot Neptune

(2019)

Authors:

O Barragán, S Aigrain, D Kubyshkina, D Gandolfi, J Livingston, MCV Fridlund, L Fossati, J Korth, H Parviainen, L Malavolta, E Palle, HJ Deeg, G Nowak, VM Rajpaul, N Zicher, G Antoniciello, N Narita, S Albrecht, LR Bedin, J Cabrera, WD Cochran, J de Leon, Ph Eigmüller, A Fukui, V Granata, S Grziwa, E Guenther, AP Hatzes, N Kusakabe, DW Latham, M Libralato, R Luque, P Montañés-Rodríguez, F Murgas, D Nardiello, I Pagano, G Piotto, CM Persson, S Redfield, M Tamura
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2.5-D retrieval of atmospheric properties from exoplanet phase curves: Application to WASP-43b observations

(2019)

Authors:

Patrick GJ Irwin, Vivien Parmentier, Jake Taylor, Jo Barstow, Suzanne Aigrain, Elspeth KH Lee, Ryan Garland
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Constraining the properties of HD 206893 B A combination of radial velocity, direct imaging, and astrometry data (vol 627, L9, 2019)

ASTRONOMY & ASTROPHYSICS 629 (2019) ARTN C1

Authors:

A Grandjean, A-M Lagrange, H Beust, L Rodet, J Milli, P Rubini, C Babusiaux, N Meunier, P Delorme, S Aigrain, N Zicher, M Bonnefoy, BA Biller, J-L Baudino, M Bonavita, A Boccaletti, A Cheetham, JH Girard, J Hagelberg, M Janson, J Lannier, C Lazzoni, R Ligi, A-L Maire, D Mesa, C Perrot, D Rouan, A Zurlo

Abstract:

© A. Grandjean et al. 2019. The distance d was missing in the denominator of the first equation of Appendix D.2. The corrected equation is: (Formula Presented).
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An 11 Earth-Mass, Long-Period Sub-Neptune Orbiting a Sun-like Star

(2019)

Authors:

Andrew W Mayo, Vinesh M Rajpaul, Lars A Buchhave, Courtney D Dressing, Annelies Mortier, Li Zeng, Charles D Fortenbach, Suzanne Aigrain, Aldo S Bonomo, Andrew Collier Cameron, David Charbonneau, Adrien Coffinet, Rosario Cosentino, Mario Damasso, Xavier Dumusque, AF Martinez Fiorenzano, Raphaëlle D Haywood, David W Latham, Mercedes López-Morales, Luca Malavolta, Giusi Micela, Emilio Molinari, Logan Pearce, Francesco Pepe, David Phillips, Giampaolo Piotto, Ennio Poretti, Ken Rice, Alessandro Sozzetti, Stephane Udry
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