Results 81 to 90 of about 23,116,162 (197)

EDGE-INFERNO: How chemical enrichment assumptions impact the individual stars of a simulated ultra-faint dwarf galaxy

Astronomy & Astrophysics
The chemical abundances of stars in galaxies are a fossil record of the star formation and stellar evolution processes that regulate galaxy formation, including the stellar initial mass function, the fraction and timing of type Ia supernovae (SNeIa), and
Andersson Eric P., Rey Martin P., Yates Robert M., Read Justin I., Agertz Oscar, Ji Alexander P., Mead Jennifer, Brauer Kaley, Mac Low Mordecai-Mark   +8 more
doaj   +1 more source

The SDSS White Dwarf - M Star Library

, 2011
to appear in the ASP Conference Series on "Evolution of Compact Binaries" (ESO), Vi\~na del Mar ...
Heller, René, Schwope, Axel D., Østensen, Roy H.   +2 more
openaire   +2 more sources

An analysis of luminosity classification of red stars using 2MASS photometric data to create an unbiased sample of red dwarf stars

, 2002
Study determined if 2MASS photometric data are reliable for luminosity classification using JHK plots of Reid and Hawley (2001). Effects of interstellar reddening on the placement of giant and dwarf data on the JIIK plot were analyzed. Dwarfs (N=54) were
Furiak, Nicolas M.
core  

On the Possibility of an Upper Limit on Magnetically Induced Radius Inflation in Low-mass Stars

The Astrophysical Journal
The radii of low-mass stars are observed to be inflated above standard model predictions, especially in magnetically active stars. Typically, the empirical relative radius inflations Δ R / R are ≤10% but in (rare) cases may be ≥20%.
J. MacDonald, D. J. Mullan
doaj   +1 more source

Transiting Jupiters around M Dwarfs Have Similar Masses to FGK Warm Jupiters

The Astrophysical Journal
This paper presents a comparative analysis of the bulk properties (mass and radius) of transiting giant planets (≳8 R _⊕ ) orbiting FGKM stars. Our findings suggest that the average mass of M-dwarf Jupiters is lower than that of their solar-type ...
Shubham Kanodia
doaj   +1 more source

Habitable Zone Lifetime of Exoplanets around Main Sequence Stars [PDF]

, 2013
Funding: Dean's Scholarship at the University of East Anglia.The potential habitability of newly discovered exoplanets is initially assessed by determining whether their orbits fall within the circumstellar habitable zone of their star.
Claire, M., Rushby, Andrew, Watson, A., Osborn, H.   +3 more
core   +1 more source

JWST/NIRCam Detection of the Fomalhaut C Debris Disk in Scattered Light

The Astrophysical Journal Letters
Observations of debris disks offer important insights into the formation and evolution of planetary systems. Though M dwarfs make up approximately 80% of nearby stars, very few M dwarf debris disks have been studied in detail—making it unclear how or if ...
Kellen Lawson, Joshua E. Schlieder, Jarron M. Leisenring, Ell Bogat, Charles A. Beichman, Geoffrey Bryden, András Gáspár, Tyler D. Groff, Michael W. McElwain, Michael R. Meyer, Thomas Barclay, Per Calissendorff, Matthew De Furio, Yiting Li, Marcia J. Rieke, Marie Ygouf, Thomas P. Greene, Julien H. Girard, Mario Gennaro, Jens Kammerer, Armin Rest, Thomas L. Roellig, Ben Sunnquist   +22 more
doaj   +1 more source

Confirmation of the hot super-Neptune TOI-672 b with NIRPS and HARPS

Astronomy & Astrophysics
The Neptunian desert is a distinct lack of Neptune-sized planets at short orbital periods, purportedly carved by photoevaporation and tidal circularisation following high-eccentricity migration.
Osborn Ares, Cloutier Ryan, Bourrier Vincent, Skinner Bennett, Gromek Nicole, Srivastava Avidaan, Bouchy François, Cointepas Marion, Cook Neil J., Nari Nicola, Almenara Jose Manuel, Artigau Étienne, Bonfils Xavier, Cadieux Charles, Eggenberger Patrick, L’Heureux Alexandrine, Baron Frédérique, Barros Susana C. C., Benneke Björn, Bryan Marta, Martins Bruno L. Canto, Cowan Nicolas B., Cristo Eduardo, Delfosse Xavier, De Medeiros Jose Renan, Doyon René, Dumusque Xavier, Ehrenreich David, González Hernández Jonay I., Lafrenière David, de Castro Leão Izan, Lovis Christophe, Malo Lison, Melo Claudio, Mignon Lucile, Mordasini Christoph, Pepe Francesco, Rebolo Rafael, Rowe Jason, Santos Nuno C., Ségransan Damien, Suárez Mascareño Alejandro, Udry Stéphane, Valencia Diana, Wade Gregg, Aguiar José Luan A., Allart Romain, Al Moulla Khaled, Carmona Andres, Collins Karen A., Delgado-Mena Elisa, de Lima Gomes Roseane, Dixon George, Evans Phil, Frensch Yolanda G. C., Fontinele Dasaev O., Forveille Thierry, Gan Tianjun, Hobson Melissa J., Messias Yuri S., Nielsen Louise D., Parc Léna, Shu Ying, Stefanov Atanas K., Tan Thiam-Gun, Vignes Jean-Pascal, Wardenier Joost P., Weisserman Drew   +67 more
doaj   +1 more source

A Hot Ultraviolet Flare on the M Dwarf Star GJ 674

The Astrophysical Journal Letters, 2019
Abstract As part of the Mega-Measurements of the Ultraviolet Spectral Characteristics of Low-Mass Exoplanetary Systems Hubble Space Telescope (HST) Treasury program, we obtained time-series ultraviolet spectroscopy of the M2.5V star, GJ 674.
Cynthia S. Froning, Adam Kowalski, Kevin France, R. O. Parke Loyd, P. Christian Schneider, Allison Youngblood, David Wilson, Alexander Brown, Zachory Berta-Thompson, J. Sebastian Pineda, Jeffrey Linsky, Sarah Rugheimer, Yamila Miguel   +12 more
openaire   +5 more sources

Nearby M Dwarf Stars and the Wide Main Sequence [PDF]

, 2017
This dissertation addresses the underlying causes for the observed widening of the main sequence for low mass stars and presents the results of three different studies using two different astrophysical observing methods to assess the properties of a ...
Clements, Tiffany D
core   +1 more source