Exoplanets and Stellar Physics

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A multispecies pseudoadiabat for simulating condensable-rich exoplanet atmospheres

ArXiv 2108.12902 (2021)

Authors:

RJ Graham, Tim Lichtenberg, Ryan Boukrouche, Ray Pierrehumbert
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INFUSE: assembly and alignment of a rocket-borne FUV integral field spectrograph

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 11821 (2021) 118210f-118210f-12

Authors:

Emily M Witt, Brian T Fleming, James C Green, Kevin France, Jack Williams, Takashi Sukegawa, Oswald Siegmund, Dana Chafetz, Matthias Tecza, Anika Levy, Alex Haughton
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Masses and compositions of three small planets orbiting the nearby M dwarf L231-32 (TOI-270) and the M dwarf radius valley

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 507:2 (2021) 2154-2173

Authors:

V Van Eylen, N Astudillo-Defru, X Bonfils, J Livingston, T Hirano, R Luque, KWF Lam, AB Justesen, JN Winn, D Gandolfi, G Nowak, E Palle, S Albrecht, F Dai, B Campos Estrada, JE Owen, D Foreman-Mackey, M Fridlund, J Korth, S Mathur, T Forveille, T Mikal-Evans, HLM Osborne, CSK Ho, JM Almenara, E Artigau, O Barragán, SCC Barros, F Bouchy, J Cabrera, DA Caldwell, D Charbonneau, P Chaturvedi, WD Cochran, S Csizmadia, M Damasso, X Delfosse, JR De Medeiros, RF Díaz, R Doyon, M Esposito, G Fűrész, P Figueira, I Georgieva, E Goffo, S Grziwa, E Guenther, AP Hatzes, JM Jenkins, P Kabath, E Knudstrup, DW Latham, B Lavie, C Lovis, RE Mennickent, SE Mullally, F Murgas, N Narita, FA Pepe, CM Persson, S Redfield, GR Ricker, NC Santos, S Seager, LM Serrano, AMS Smith, A Suárez Mascareño, J Subjak, JD Twicken, S Udry, R Vanderspek, MR Zapatero Osorio
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About the modelling of the SED for the inner boundary of protoplanetary discs at the lower stellar mass regime

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 506:4 (2021) 5361-5372

Authors:

Sebastián Morales-Gutiérrez, Erick Nagel, Oscar Barragan
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The impact of mixing treatments on cloud modelling in 3D simulations of hot Jupiters

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 506:3 (2021) 4500-4515

Authors:

DA Christie, NJ Mayne, S Lines, V Parmentier, J Manners, I Boutle, B Drummond, T Mikal-Evans, DK Sing, K Kohary

Abstract:

ABSTRACT We present results of 3D hydrodynamical simulations of HD209458b including a coupled, radiatively active cloud model (eddysed). We investigate the role of the mixing by replacing the default convective treatment used in previous works with a more physically relevant mixing treatment (Kzz) based on global circulation. We find that uncertainty in the efficiency of sedimentation through the sedimentation factor fsed plays a larger role in shaping cloud thickness and its radiative feedback on the local gas temperatures – e.g. hotspot shift and day-to-night side temperature gradient – than the switch in mixing treatment. We demonstrate using our new mixing treatments that simulations with cloud scales that are a fraction of the pressure scale height improve agreement with the observed transmission spectra, the emission spectra, and the Spitzer 4.5 µm phase curve, although our models are still unable to reproduce the optical and ultraviolet transmission spectra. We also find that the inclusion of cloud increases the transit asymmetry in the optical between the east and west limbs, although the difference remains small ($\lesssim 1{{\ \rm per\ cent}}$).
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