Prof Suzanne Aigrain: Publications

Stellar_flare_hits_HD_189733_b_(artist's_impression)

This artist's impression shows the hot Jupiter HD 189733b, as it passes in front of its parent star, as the latter is flaring, driving material away from the planet. The escaping atmosphere is seen silhouetted against the starlight. The surface of the star, which is around 80% the mass of the Sun, is based on observations of the Sun from NASA's Solar Dynamics Observatory.

Credit: NASA, ESA, L. Calçada, Solar Dynamics Observatory

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

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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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Prof Suzanne Aigrain

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

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Abstract:

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

Authors:

2.5-D retrieval of atmospheric properties from exoplanet phase curves: Application to WASP-43b observations

Authors:

Constraining the properties of HD 206893 B A combination of radial velocity, direct imaging, and astrometry data (vol 627, L9, 2019)

Authors:

Abstract:

An 11 Earth-Mass, Long-Period Sub-Neptune Orbiting a Sun-like Star

Authors:

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

Authors:

Abstract:

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

Authors:

2.5-D retrieval of atmospheric properties from exoplanet phase curves: Application to WASP-43b observations

Authors:

Constraining the properties of HD 206893 B A combination of radial velocity, direct imaging, and astrometry data (vol 627, L9, 2019)

Authors:

Abstract:

An 11 Earth-Mass, Long-Period Sub-Neptune Orbiting a Sun-like Star

Authors: