Results 231 to 240 of about 38,924 (266)

The Evolution of Low-Mass Stars

1992
At the end of core hydrogen burning low-mass stars develop a helium core where the electrons are degenerate. This occurs when the mass of this helium core is smaller than 0.31 M⊙. The upper boundary for this group of low-mass stars is not exactly determined; in fact it depends on the initial chemical composition of the stars and on the details of the ...
C. W. H. De Loore, C. Doom
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Low-Mass Stars and Their Companions

2017
In this thesis, I present seven studies aimed towards better understanding the demographics and physical properties of M dwarfs and their companions. These studies focus in turn on planetary, brown dwarf, and stellar companions to M dwarfs. I begin with an analysis of radial velocity and transit timing analyses of multi-transiting planetary systems ...
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Mass Determination of Very Low Mass Stars

1995
We discuss the precision achieved with the present observing techniques for the mass determination of low and very low mass stars. We show the gain that will be achieved with high precision radial velocity measurements combined with diffraction-limited imaging with 8-m class telescopes and the VLTI.
A. Duquennoy, J.-M. Mariotti, M. Mayor, C. Perrier   +3 more
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The Formation of Low Mass Stars

1999
The- question of the origin of stars is one of the most fundamental of astronomy. Yet, despite thousands of years of stellar observation, and early speculations by Newton and Laplace, it has only been in the latter part of the present century that the investigation of star formation has become an active discipline of astrophysical research.
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The formation of low-mass stars

Publications of the Astronomical Society of the Pacific, 1989
Visible to millimeter wavelength observations of the global and individual aspects of low-mass star formation are discussed. Infrared and millimeter-wave techniques reveal large collections of dust-embedded young stellar objects associated with the densest regions of molecular clouds.
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Slope of the mass function of low-mass stars

Astrophysics, 1987
It is shown that the modern method of obtaining the initial mass function contains a number of a uncertainties that can have a significant effect on the slope of the function in the low-mass section (m < m**). The influence of changes of the mass-luminosity relation, the scale of bolometric corrections, and the luminosity function on the form of the ...
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Plasmon decay into low-mass bosons in stars

Physical Review D, 1988
A low-mass boson a, if it couples by a two-photon vertex, can be produced in the plasma decay process ${\ensuremath{\gamma}}_{t}$\ensuremath{\rightarrow}${\ensuremath{\gamma}}_{l}$+a and in the plasma coalescence process ${\ensuremath{\gamma}}_{t}$+${\ensuremath{\gamma}}_{l}$\ensuremath{\rightarrow}a, where ${\ensuremath{\gamma}}_{t}$ and ${\ensuremath{
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Low Mass Star Formation

1999
We review the basic ideas and key processes in low mass star formation with three goals. First, to introduce and explain the concepts and nomenclature frequently used in the literature. Second, to present a simplified, but (hopefully) coherent picture of low mass star formation. Third, to point out some of the important issues that are not yet resolved.
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Integrated mass-loss of evolved stars in M4 using asteroseismology

Monthly Notices of the Royal Astronomical Society, 2022
Simon Campbell, Dennis Stello, Madeline Howell   +2 more
exaly  

Very regular high-frequency pulsation modes in young intermediate-mass stars

Nature, 2020
Tim Bedding, Jj Hermes, Tanda Li
exaly