Results 11 to 20 of about 94,786 (300)
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. +2 more
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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
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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
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The habitability of planets orbiting M-dwarf stars
Physics Reports, 2016 The prospects for the habitability of M-dwarf planets have long been debated, due to key differences between the unique stellar and planetary environments around these low-mass stars, as compared to hotter, more luminous Sun-like stars. Over the past decade, significant progress has been made by both space- and ground-based observatories to measure the
Aomawa L Shields +2 more
exaly +6 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. +2 more
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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 +5 more
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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 +10 more
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The Astrophysical Journal, 2023 About 70%–80% of stars in our solar and Galactic neighborhood are M dwarfs. They span a range of low masses and temperatures relative to solar-type stars, facilitating molecule formation throughout their atmospheres.
Aishwarya R. Iyer +4 more
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Single-hemisphere Dynamos in M-dwarf Stars
The Astrophysical Journal Letters, 2020 Abstract M-dwarf stars below a certain mass are convective from their cores to their photospheres. These fully convective objects are extremely numerous, very magnetically active, and the likely hosts of many exoplanets. Here we study, for the first time, dynamo action in simulations of stratified, rotating, fully convective M-dwarf ...
Benjamin P. Brown +4 more
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The Chromospheric Activity and Ages of M Dwarf Stars in Wide Binary Systems [PDF]
, 2005 We investigate the relationship between age and chromospheric activity for 139 M dwarf stars in wide binary systems with white dwarf companions. The age of each system is determined from the cooling age of its white dwarf component. The current limit for
Abt H. A. +12 more
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