Results 81 to 90 of about 553,339 (197)
The evolution of two stellar populations in globular clusters I. The dynamical mixing timescale
, 2008 We investigate the long-term dynamical evolution of two distinct stellar populations of low-mass stars in globular clusters in order to study whether the energy equipartition process can explain the high number of stars harbouring abundance anomalies ...
Baumgardt, H., Decressin, T., Kroupa, P.
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Kepler Studies of Low-Mass Eclipsing Binaries I. Parameters of the Long-Period Binary KIC 6131659
, 2012 KIC 6131659 is a long-period (17.5 days) eclipsing binary discovered by the Kepler mission. We analyzed six quarters of Kepler data along with supporting ground-based photometric and spectroscopic data to obtain accurate values for the mass and radius of
Bass, Gideon +7 more
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Gravitational waves from low mass neutron stars [PDF]
Physical Review D, 2010 Low mass neutron stars may be uniquely strong sources of gravitational waves (GW). The neutron star crust can support large deformations for low mass stars. This is because of the star's weaker gravity. We find maximum ellipticities $ $ (fractional difference in moments of inertia) that are 1000 times larger, and maximum quadrupole moments $Q_{22 ...
openaire +2 more sources
The Astrophysical JournalThe stellar initial mass function (IMF) characterizes the mass distribution of newly formed stars in various cosmic environments, serving as a fundamental assumption in astrophysical research. Recent findings challenge the prevalent notion of a universal
Zhiqiang Yan +5 more
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Stellar-Mass-Dependent Disk Structure in Coeval Planet-Forming Disks
, 2010 Previous studies suggest that the planet-forming disks around very-low-mass stars/brown dwarfs may be flatter than those around more massive stars, in contrast to model predictions of larger scale heights for gas-disks around lower-mass stars.
Andrews +36 more
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The Astronomical JournalM dwarfs are ubiquitous in our Galaxy, and the rate at which they host stellar companions, and the properties of these companions, provide a window into the formation and evolution of the star(s), and of any planets that they may host.
Catherine A. Clark +10 more
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Low-mass stars: Open problems all along their evolution
EPJ Web of Conferences, 2013 Although low-mass stars have a comparatively simple structure, current stellar models are far from reproducing them accurately. In light of the observational progress, in particular of asteroseismology, the deficits of the theory of stellar structure and
Heners N., Weiss A.
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Carbon-Enhanced Hyper-metal-poor Stars and the Stellar IMF at Low Metallicity
, 2007 The two known ``hyper-metal-poor'' (HMP) stars, HE0107-5240 and HE1327-2326, have extremely high enhancements of the light elements C, N, and O relative to Fe and appear to represent a statistically significant excess population relative to the halo ...
Duquennoy A. +2 more
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S-process in low-mass extremely metal-poor stars
EPJ Web of Conferences, 2012 We present post-processing s-process calculations for the core He-flash of a 1M☉ star with and Z = 10−8. Our model shows neutron densities larger than 1014cm−3, resulting in the production of s-process elements. The model reproduces the C, O, Sr, and Ba
Weiss A., Serenelli A., Cruz M.A.
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Low Mass Stars and the He3 Problem
, 1996 The prediction of standard chemical evolution models of higher abundances of He3 at the solar and present-day epochs than are observed indicates a possible problem with the yield of He3 for stars in the range of 1-3 solar masses.
Carswell R. F. +14 more
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