Results 51 to 60 of about 1,868 (166)

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

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

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

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

TESS Observations of Outbursts on Polars—Superflares

The Astrophysical Journal
Flare events are magnetic activities on the stellar surface, which can provide us with information about the accretion behavior and evolution of polars. In this paper, we search for flare events on polars from all the available 2 minute cadence TESS data
Qishan Wang, Xiaohui Fang, Shengbang Qian   +2 more
doaj   +1 more source

Searching for GEMS: Discovery of the Nearby Post-common-envelope Binary System TIC-460388167

The Astrophysical Journal
Short-period white dwarf + main-sequence binaries are post-common-envelope binaries (PCEBs) that have survived a common envelope phase. Such systems, if detached and eclipsing, enable precise measurements of the constituent stars, providing a unique ...
Alexandra Boone, Henry A. Kobulnicky, Caleb I. Cañas, Shubham Kanodia, Andrew Monson, Peter Shea, William Cochran, Suvrath Mahadevan, Joe Ninan, Paul Robertson, Te Han, Arpita Roy, Christian Schwab, Madeleine Allen   +13 more
doaj   +1 more source

K-band spectroscopic metallicities and temperatures of M-dwarf stars

EPJ Web of Conferences, 2013
I present the metallicity and effective temperature techniques developed for M dwarf stars by Rojas-Ayala et al. (2010, 2012). These techniques are based on absorption features present in the modest resolution K-band spectra (R∼2700) of M dwarfs and have
Rojas-Ayala Bárbara
doaj   +1 more source

Transcriptomic and photosynthetic analyses of Synechocystis sp. PCC6803 and Chlorogloeopsis fritschii sp. PCC6912 exposed to an M-dwarf spectrum under an anoxic atmosphere

Frontiers in Plant Science
IntroductionCyanobacteria appeared in the anoxic Archean Earth, evolving for the first time oxygenic photosynthesis and deeply changing the atmosphere by introducing oxygen.
Mariano Battistuzzi, Mariano Battistuzzi, Mariano Battistuzzi, Maria Silvia Morlino, Lorenzo Cocola, Livio Trainotti, Laura Treu, Stefano Campanaro, Riccardo Claudi, Riccardo Claudi, Luca Poletto, Nicoletta La Rocca, Nicoletta La Rocca   +12 more
doaj   +1 more source