Results 11 to 20 of about 24,390,120 (296)

On M Dwarf Flare Stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1966
Acoustic waves, hydromagnetic effect, and convective instability due to molecular dissociation are considered as mechanisms for flare activity in M dwarf stars. The first mechanism does not appear to be significant.
Vardya, M. S.
core   +3 more sources

Habitability and sub glacial liquid water on planets of M-dwarf stars [PDF]

Nature Communications, 2023
A long-standing issue in astrobiology is whether planets orbiting the most abundant type of stars, M-dwarfs, can support liquid water and eventually life.
Amri Wandel
doaj   +2 more sources

The Quest for Pulsating M Dwarf Stars [PDF]

Frontiers in Astronomy and Space Sciences, 2019
Recent fully non-adiabatic theoretical studies of M dwarf models show that they have the potential to excite radial, and low-order, low-degree non-radial modes, as well as solar-like oscillations, due to models being completely convective or having large
Cristina Rodríguez-López
doaj   +2 more sources

A Reappraisal of The Habitability of Planets around M Dwarf Stars

Astrobiology, 2007
Stable, hydrogen-burning, M dwarf stars comprise about 75% of all stars in the Galaxy. They are extremely long-lived and because they are much smaller in mass than the Sun (between 0.5 and 0.08 MSun), their temperature and stellar luminosity are low and peaked in the red.
Tarter, Jill C., Backus, Peter R., Mancinelli, Rocco L., Aurnou, Jonathan M., Backman, Dana E., Basri, Gibor S., Boss, Alan P., Clarke, Andrew, Deming, Drake, Doyle, Laurance R., Feigelson, Eric D., Freund, Friedmann, Grinspoon, David H., Haberle, Robert M., Hauck, Steven A., Heath, Martin J., Henry, Todd J., Hollingsworth, Jeffery L., Joshi, Manoj M., Kilston, Steven, Liu, Michael C., Meikle, Eric, Reid, I. Neill, Rothschild, Lynn J., Scalo, John, Segura, Antigona, Tang, Carol M., Tiedje, James M., Turnbull, Margaret C., Walkowicz, Lucianne M., Weber, Arthur L., Young, Richard E.   +31 more
openaire   +7 more sources

Shock formation around planets orbiting M‐dwarf stars [PDF]

Astronomische Nachrichten, 2011
AbstractBow shocks can be formed around planets due to their interaction with the coronal medium of the host stars. The net velocity of the particles impacting on the planet determines the orientation of the shock. At the Earth's orbit, the (mainly radial) solar wind is primarily responsible for the formation of a shock facing towards the Sun. However,
Vidotto, A. A., Llama, J., Jardine, M., Helling, Ch., Wood, K.   +4 more
openaire   +3 more sources

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   +2 more sources

Stellar Parameterization of LAMOST M Dwarf Stars [PDF]

The Astrophysical Journal Supplement Series, 2021
Abstract The M dwarf stars are the most common stars in the Galaxy, dominating the population of the Galaxy at faint magnitudes. Precise and accurate stellar parameters for M dwarfs are of crucial importance for many studies. However, the atmospheric parameters of M dwarf stars are difficult to determine.
Jiadong Li, Chao Liu, Bo Zhang, Hao Tian, Dan Qiu, Haijun Tian   +5 more
openaire   +2 more sources

New Observational Constraints on the Winds of M dwarf Stars* [PDF]

The Astrophysical Journal, 2021
Abstract High-resolution UV spectra of stellar H i Lyα lines from the Hubble Space Telescope (HST) provide observational constraints on the winds of coronal main-sequence stars, thanks to an astrospheric absorption signature created by the interaction between the stellar winds and the interstellar medium.
Brian E. Wood, Hans-Reinhard Müller, Seth Redfield, Fallon Konow, Hunter Vannier, Jeffrey L. Linsky, Allison Youngblood, Aline A. Vidotto, Moira Jardine, Julián D. Alvarado-Gómez, Jeremy J. Drake   +10 more
openaire   +4 more sources

Pulsations in M dwarf stars [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2012
Abstract We present the results of the first theoretical non-radial, non-adiabatic pulsational study of M dwarf stellar models with masses in the range 0.1–0.5 M⊙. We find the fundamental radial mode to be unstable due to an ε mechanism, caused by deuterium (D) burning for the young 0.1 and 0.2 M⊙ models, by non-equilibrium He3 burning ...
Rodríguez-López, C., MacDonald, J., Moya, A.   +2 more
openaire   +2 more sources

THE CLOSE BINARY FRACTION OF DWARF M STARS [PDF]

The Astrophysical Journal, 2011
We describe a search for close spectroscopic dwarf M star binaries using data from the Sloan Digital Sky Survey (SDSS) to address the question of the rate of occurrence of multiplicity in M dwarfs. We use a template fitting technique to measure radial velocities from 145,888 individual spectra obtained for a magnitude-limited sample of 39,543 M dwarfs.
Clark, Benjamin M., Blake, Cullen H., Knapp, Gillian R.   +2 more
openaire   +3 more sources