Results 41 to 50 of about 2,436 (245)

RV-detected planets around M dwarfs: Challenges for core accretion models

, 2022
Planet formation is sensitive to the conditions in protoplanetary disks, for which scaling laws as a function of stellar mass are known. We aim to test whether the observed population of planets around low-mass stars can be explained by these trends, or ...
Henning, Thomas, Seifert, A., Sabotta, S., Mordasini, Christoph, Reffert, Sabine, Burn, R., Henning, Th., R. Burn, A. Emsenhuber, Sabotta, Silvia, C. Mordasini, Schlecker, Martin, Y. Shan, S. Sabotta, A. Seifert, Reffert, S., S. Reffert, M. Schlecker, Schlecker, M., Burn, Remo, H. Klahr, Mordasini, C., Klahr, Hubert, Th. Henning, Seifert, Antonia, Shan, Yutong, Shan, Y., Emsenhuber, A., Emsenhuber, Alexandre, Klahr, H.   +29 more
core   +1 more source

CFBDS J005910.90-011401.3: reaching the T-Y brown dwarf transition? [PDF]

Astronomy & Astrophysics, 2008
12 pages, Submitted to A& ...
Delorme, P., Delfosse, X., Albert, L., Artigau, E., Forveille, T., Reylé, C., Allard, F., Homeier, D., Robin, A. C., Willott, C. J., Liu, M. C., Dupuy, T. J.   +11 more
openaire   +5 more sources

THE FIRST DETECTION OF PHOTOMETRIC VARIABILITY IN A Y DWARF: WISE J140518.39+553421.3 [PDF]

The Astrophysical Journal, 2016
ABSTRACT We present the first detection of the photometric variability in a spectroscopically confirmed Y dwarf. The Infrared Array Camera on board the Spitzer Space Telescope was used to obtain time series photometry of WISE J140518.39+553421.3 at 3.6 and 4.5 μm over a 24-hr period at two different epochs separated by 149 days ...
Michael C. Cushing, Kevin K. Hardegree-Ullman, Jesica L. Trucks, Caroline V. Morley, John E. Gizis, Mark S. Marley, Jonathan J. Fortney, J. Davy Kirkpatrick, Christopher R. Gelino, Gregory N. Mace, Sean J. Carey   +10 more
openaire   +4 more sources

Keck NIRES Spectral Standards for L, T, and Y Dwarfs

Research Notes of the AAS, 2022
Abstract We present medium-resolution (λ/Δλ = 2700), near-infrared spectral standards for field L0–L2, L4, and L7–Y0 dwarfs obtained with the Near-Infrared Echellette Spectrometer on the Keck II 10 m telescope. These standards allow for detailed spectral comparative analysis of cold brown dwarfs discovered through ongoing ground-based ...
Christopher A. Theissen, Adam J. Burgasser, Emily C. Martin, Michael C. Cushing, Quinn M. Konopacky, Ian S. McLean, Chih-Chun Hsu, Daniella C. Bardalez Gagliuffi, Adam C. Schneider, Marc J. Kuchner, Jacqueline K. Faherty, Charles A. Beichman, Brittany Miles, Andy Skemer, Sarah E. Logsdon, Aaron M. Meisner, J. Davy Kirkpatrick   +16 more
openaire   +2 more sources

Microphysics of Water Clouds in the Atmospheres of Y Dwarfs and Temperate Giant Planets

The Astrophysical Journal, 2022
Water clouds are expected to form on Y dwarfs and giant planets with equilibrium temperatures near or below that of Earth, drastically altering their atmospheric compositions and their albedos and thermal emission spectra. Here we discuss how we used the 1D Community Aerosol and Radiation Model for Atmospheres (CARMA) to investigate the microphysics of
James Mang, Peter Gao, Callie E. Hood, Jonathan J. Fortney, Natasha Batalha, Xinting Yu, Imke de Pater   +6 more
openaire   +4 more sources

Gaia white dwarfs within 40 pc II: The volume-limited Northern hemisphere sample

, 2021
We present an overview of the sample of Northern hemisphere white dwarfs within 40 pc of the Sun detected from Gaia Data Release 2 (DR2). We find that 521 sources are spectroscopically confirmed degenerate stars, 111 of which were first identified as ...
Cunningham, Tim, Izquierdo, Paula, Toonen, Silvia, Rebassa-Mansergas, Alberto, Gentile Fusillo, Nicola P., Gänsicke, Boris T., Hollands, Mark, McCleery, Jack, Tremblay, Pier Emmanuel   +8 more
core   +1 more source

Atmospheric Retrieval Of Cool Y Dwarfs

, 2017
Brown dwarfs' near-infrared spectra contain a wealth of information which can reveal the physical and chemical processes that occur in their atmospheres. Using a recently developed atmospheric retrieval model, we are able to constrain various molecular abundances, along with photometric radius, gravity, cloud optical depths, and temperature profiles ...
Zalesky, Joseph, Line, Michael, Schneider, Adam   +2 more
openaire   +2 more sources

The CARMENES search for exoplanets around M dwarfs: Planet occurrence rates from a subsample of 71 stars [PDF]

, 2021
Context. The CARMENES exoplanet survey of M dwarfs has obtained more than 18 000 spectra of 329 nearby M dwarfs over the past five years as part of its guaranteed time observations (GTO) program.
Jeffers, S., Caballero, J. A., Ribas, Ignasi, Passegger, V., Muñoz Sánchez, J. C., Sabotta, S., D. Montes, Montes, D., Ribas, I., A. P. Hatzes, J. C. Morales, Muñoz Sánchez, J., Schlecker, Martin, Perger, M., Guenther, E., A. Kaminski, Henning, T., Kaminski, Adrian, M. Schlecker, M. Perger, M. Lafarga, A. Quirrenbach, Zechmeister, M., A. Reiners, Th. Henning, Hatzes, Artie P., Lafarga, M., M. Zechmeister, Kürster, M., Chaturvedi, P., Caballero, J., Pallé, E., E. W. Guenther, Henning, Thomas, Reiners, Ansgar, P. Chaturvedi, Zechmeister, Mathias, Muñoz Rodríguez, I., Dreizler, Stefan, M. Kürster, V. M. Passegger, M. Azzaro, Pallé, Enric, Hatzes, A., Montes, David, Dreizler, S., I. Muñoz Rodríguez, Kaminski, A., Morales, Juan Carlos, Passegger, V.M., Y. Shan, E. Pallé, Quirrenbach, Andreas, Amado, P., S. Dreizler, Jeffers, Sandra V., S. Sabotta, I. Ribas, S. V. Jeffers, Reffert, S., S. Reffert, P. J. Amado, Guenther, E. W., Schlecker, M., J. C. Muñoz Sánchez, Morales, J., H. Klahr, Azzaro, M., Shan, Y., Quirrenbach, A., Reiners, A., Amado, Pedro J., Klahr, H., J. A. Caballero   +73 more
core   +1 more source

Why human connection is the true metric of research success

FEBS Open Bio, EarlyView.
Human‐centred mentorship can be shaped by mentor attributes, actions, intrinsic drive and career ambition. Drawing on reflections across Singapore and France, as well as workshop insights from FEBS‐IUBMB ENABLE 2024, this article shows that human‐centred mentorship creates the conditions for sustainable growth, well‐being and retention in research ...
Timothy Lin Yun Tan, Mattias Wei Ren Kon, Xavier Coumoul, Fun Man Fung   +3 more
wiley   +1 more source

Intermediate Resolution Near-Infrared Spectroscopy of 36 late-M Dwarfs [PDF]

, 2012
We present observations of 36 late-M dwarfs obtained with the KeckII/NIRSPEC in the J-band at a resolution of ∼20,000. We have measured projected rotational velocities, absolute radial velocities, and pseudo-equivalent widths of atomic lines.
Carlos del Burgo Díaz
core   +2 more sources