Exoplanets and Stellar Physics

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K2-99 revisited: a non-inflated warm Jupiter, and a temperate giant planet on a 522-d orbit around a subgiant

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 510:4 (2022) 5035-5049

Authors:

AMS Smith, SN Breton, Sz Csizmadia, F Dai, D Gandolfi, RA Garc铆a, AW Howard, H Isaacson, J Korth, KWF Lam, S Mathur, G Nowak, F P茅rez Hern谩ndez, CM Persson, SH Albrecht, O Barrag谩n, J Cabrera, WD Cochran, HJ Deeg, M Fridlund, IY Georgieva, E Goffo, EW Guenther, AP Hatzes, P Kabath, JH Livingston, R Luque, E Palle, S Redfield, F Rodler, LM Serrano, V Van Eylen

Black Mirror: The impact of rotational broadening on the search for reflected light from 51 Pegasi b with high resolution spectroscopy

(2022)

Authors:

EF Spring, JL Birkby, L Pino, R Alonso, S Hoyer, ME Young, PRT Coelho, D Nespral, M L贸pez-Morales

Publisher Correction: A solar C/O and sub-solar metallicity in a hot Jupiter atmosphere

Nature Springer Nature 601:7891 (2022) e3-e3

Authors:

Michael R Line, Matteo Brogi, Jacob L Bean, Siddharth Gandhi, Joseph Zalesky, Vivien Parmentier, Peter Smith, Gregory N Mace, Megan Mansfield, Eliza M-R Kempton, Jonathan J Fortney, Evgenya Shkolnik, Jennifer Patience, Emily Rauscher, Jean-Michel D茅sert, Joost P Wardenier

HST/WFC3 Complete Phase-resolved Spectroscopy of White-dwarf-brown-dwarf Binaries WD 0137 and EPIC 2122

ASTRONOMICAL JOURNAL 163:1 (2022) ARTN 17

Authors:

Yifan Zhou, Daniel Apai, Xianyu Tan, Joshua D Lothringer, Ben WP Lew, Sarah L Casewell, Vivien Parmentier, Mark S Marley, Siyi Xu, LC Mayorga

Magnetic field evolution of the K2 dwarf V471 Tau

Monthly notices of the Royal Astronomical Society, 513, 2893

Authors:

Bonnie Zaire, Jean-Francois Donati, Baptiste Klein

Abstract:

Observations of the eclipsing binary system V471 Tau show that the time of the primary eclipses varies in an apparent periodic way. With growing evidence that the magnetically active K2 dwarf component might be responsible for driving the eclipse timing variations (ETVs), it is necessary to monitor the star throughout the predicted ~35 yr activity cycle that putatively fuels the observed ETVs. We contribute to this goal with this paper by analysing spectropolarimetric data obtained with ESPaDOnS at the Canada-France-Hawaii Telescope in 2014 December and 2015 January. Using Zeeman-Doppler Imaging, we reconstruct the distribution of brightness inhomogeneities and large-scale magnetic field at the surface of the K2 dwarf. Compared to previous tomographic reconstructions of the star carried out with the same code, we probe a new phase of the ETVs cycle, offering new constraints for future works exploring whether a magnetic mechanism operating in the K2 dwarf star is indeed able to induce the observed ETVs of V471 Tau.