Physical Sciences and Mathematics Commons^™

Global 3d Radiation Hydrodynamic Simulations Of Proto-Jupiter’S Convective Envelope, Zhaohuan Zhu, Yan-Fei Jiang, Hans Baehr, Andrew N. Youdin, Philip J. Armitage, Rebecca G. Martin

Physics & Astronomy Faculty Research

The core accretion model of giant planet formation has been challenged by the discovery of recycling flows between the planetary envelope and the disc that can slow or stall envelope accretion. We carry out 3D radiation hydrodynamic simulations with an updated opacity compilation to model the proto-Jupiter’s envelope. To isolate the 3D effects of convection and recycling, we simulate both isolated spherical envelopes and envelopes embedded in discs. The envelopes are heated at given rates to achieve steady states, enabling comparisons with 1D models. We vary envelope properties to obtain both radiative and convective solutions. Using a passive scalar, we …

Toi-674b: An Oasis In The Desert Of Exo-Neptunes Transiting A Nearby M Dwarf, F. Murgas, N. Astudillo-Defru, X. Bonfils, I. Crossfield, J. M. Almenara, J. Livingston, K. G. Stassun, J. Korth, J. Orell-Miquel, G. Morello, J. D. Eastman, J. J. Lissauer, S. R. Kane, F. Y. Morales, M. W. Werner, V. Gorjian, B. Benneke, D. Dragomir, E. C. Matthews, S. B. Howell, D. Ciardi, E. Gonzales, R. Matson, C. Beichman, J. Schlieder, K. A. Collins, K. I. Collins, Eric L.N. Jensen, P. Evans, F. J. Pozuelos, M. Gillon, E. Jehin, K. Barkaoui, E. Artigau, F. Bouchy, D. Charbonneau, X. Delfosse, R. F. Díaz, R. Doyon, P. Figueira, T. Forveille, C. Lovis, C. Melo, G. Gaisné, F. Pepe, N. C. Santos, D. Ségransan, S. Udry, R. F. Goeke, A. M. Levine, E. V. Quintana, N. M. Guerrero, I. Mireles, D. A. Caldwell, P. Tenenbaum, C. E. Brasseur, G. Ricker, R. Vanderspek, D. W. Latham, S. Seager, J. Winn, J. M. Jenkins

Physics & Astronomy Faculty Works

Context. The NASA mission TESS is currently doing an all-sky survey from space to detect transiting planets around bright stars. As part of the validation process, the most promising planet candidates need to be confirmed and characterized using follow-up observations. Aims. In this article, our aim is to confirm the planetary nature of the transiting planet candidate TOI-674b using spectroscopic and photometric observations. Methods. We use TESS, Spitzer, ground-based light curves, and HARPS spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate TOI-674b. We perform a joint fit of the light …

Gravity K-Band Spectroscopy Of Hd 206893 B, Jens Kammerer, S. Lacour, T. Stolker, P. Mollière, D. K. Sing, E. Nasedkin, Pierre Kervella, J. J. Wang, Kimberly Ward-Duong, Et Al

Astronomy: Faculty Publications

Context. Near-infrared interferometry has become a powerful tool for studying the orbital and atmospheric parameters of substellar companions.

Aims. We aim to reveal the nature of the reddest known substellar companion HD 206893 B by studying its near-infrared colors and spectral morphology and by investigating its orbital motion. Methods. We fit atmospheric models for giant planets and brown dwarfs and perform spectral retrievals with petitRADTRANS and ATMO on the observed GRAVITY, SPHERE, and GPI spectra of HD 206893 B. To recover its unusual spectral features, first and foremost its extremely red near-infrared color, we include additional extinction by high-altitude dust …