Results 281 to 290 of about 47,514 (302)
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Limits to Mass Outflows from Late-Type Dwarf Stars
The Astrophysical Journal, 1996We show that the mass-loss rates of active late-type dwarf stars must be significantly lower than recent estimates of up to ~5 × 10-10 M☉ yr-1, 4 orders of magnitude higher than that of the Sun. First, we present aperture-synthesis observations at 3.5 mm of the dMe flare stars YZ CMi and AD Leo, during which neither star was detected at an upper limit ...
White, SM, Lim, J
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Variability of chromospheric lines in late-type dwarf stars
Publications of the Astronomical Society of the Pacific, 1988The results of a high-resolution spectroscopic synoptic program of observations of key chromospheric diagnostics in a sample of dwarf stars are reported. Low-level variability in the strength of the chromospheric H-alpha absorption line is found. The nature of the variability implies that the operative chromospheric heating mechanism is partially ...
Giuseppe Cutispoto, Mark S. Giampapa
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Spectroscopic Tests of Late-Type Model Atmospheres of Dwarf Stars
1991The basic properties of horizontally stratified, homogeneous atmospheric models of cool dwarfs are compared with spectroscopic observations. Recent results of kinetic equilibrium calculations for stars of different metal abundances are discussed.
T. Gehren, C. Reile, W. Steenbock
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Microwave Emission from Late Type Dwarf Stars UV Ceti and YZ CMi
1985We present simultaneous VLA observations of two late type dwarf stars UV Ceti and YZ CMi at 6 and 20 cm, Multiwavelength observations put sufficient constraints on existing interpretations of quiescent radio emission from these stars. We find that the microwave emission is due to gyro-synchrotron radiation of nonthermal electrons having a power law ...
M. R. Kundu, R. K. Shevgaonkar
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Radial-velocity measures and the existence of astrophysical binaries in late-type dwarf stars
Publications of the Astronomical Society of the Pacific, 1986Radial velocities with errors of 1-2 km/s are presented based on CCD scans obtained with the Kitt Peak National Observatory coude feed telescope between 1982 and 1985 of 48 dK-M stars that lack Balmer emission. Comparison with Gliese's (1969) values shows only two stars to be spectroscopic binary candidates with small velocity amplitudes.
B. W. Bopp, R. Meredith
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Kinematics and Physics of Celestial Bodies, 2010
A numerical technique for determining absorption line formation depths in the atmospheres of late-type stars and substellar-mass subdwarfs is proposed. The technique is based on estimating individual absorptions contributed by certain layers of the stellar model atmosphere to the resulting equivalent width of a spectral line.
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A numerical technique for determining absorption line formation depths in the atmospheres of late-type stars and substellar-mass subdwarfs is proposed. The technique is based on estimating individual absorptions contributed by certain layers of the stellar model atmosphere to the resulting equivalent width of a spectral line.
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Current challenges in the physics of white dwarf stars
Physics Reports, 2022Didier Saumon, Simon Blouin
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The habitability of planets orbiting M-dwarf stars
Physics Reports, 2016Aomawa L Shields +2 more
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Pulsating White Dwarf Stars and Precision Asteroseismology
Annual Review of Astronomy and Astrophysics, 2008Kepler, So
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An absence of ex-companion stars in the type Ia supernova remnant SNR 0509−67.5
Nature, 2012Ashley Pagnotta
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