Results 161 to 170 of about 553,339 (197)
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Astrophysics and Space Science, 2005
More and more observational hints of quark stars are proposed these years though pulsars are considered conventionally to be normal neutron stars. The existence of low-mass quark stars is a direct consequence of the possibility that pulsar-like stars are actually quark stars, because of the ability that quark matter can confine itself by color ...
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More and more observational hints of quark stars are proposed these years though pulsars are considered conventionally to be normal neutron stars. The existence of low-mass quark stars is a direct consequence of the possibility that pulsar-like stars are actually quark stars, because of the ability that quark matter can confine itself by color ...
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Low- and Intermediate-Mass Stars
2018Energy in stars is provided by nuclear reactions, which, in many cases, produce radioactive nuclei. When stable nuclei are irradiated by a flux of protons or neutrons, capture reactions push stable matter out of stability into the regime of unstable species. The ongoing production of radioactive nuclei in the deep interior of the Sun via proton-capture
Maria Lugaro, Alessandro Chieffi
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Pregalactic-primordial low-mass stars
Astrophysics and Space Science, 1987The Main-Sequence positions as well as the evolutionary behavior of Population III stars up to an evolution age of 2×1010 yr, taking this time as the age of the Universe, have been investigated in the mass range 0.2 and 0.8M⊙. While Population III stars with masses greater than 0.3M⊙ develop a radiative core during the approach to the Main Sequence ...
Kızıloğlu, Nilgün Gülşan +1 more
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Mass Determination of Very Low Mass Stars
1995We 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 +3 more
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Low Mass Stars with Mass Loss and Low-Luminosity Carbon Star Formation
1987The effects of large carbon enrichments in static stellar envelopes were investigated, using new Los Alamos opacities (including low-temperature carbon and molecular opacities) and including carbon ionizations. To search for the production of low-mass, low-luminosity carbon stars, detailed stellar evolutionary computations were carried out for a grid ...
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A low-mass star with a large-mass planet
Science, 2023A large planet orbiting a very low-mass star challenges theories of planet ...
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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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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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Low-Mass Star Formation: Theory
1999Molecular clouds, the cradles of star birth, are supported against self-gravity in part by magnetic fields (McKee, this volume). In 1956, Mestel & Spitzer (see also Mestel 1965) introduced a mass scale associated with the amount of magnetic flux Φ threaded by a self-gravitating, electrically conducting, cloud.
Frank H. Shu +4 more
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Opacity problems in cool low mass stars
International Astronomical Union Colloquium, 1994In this contribution we want to discuss M star atmospheres and their dependence on molecular opacities. A star belongs to the spectral class M if its optical and infrared spectrum shows strong bands of TiO and numerous strong metal lines so that for wavelengths < 4000 Å there is “hardly any flux left” (Jaschek & Jaschek 1987).
Michael Scholz, Rainer Wehrse
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Tailoring inorganic–polymer composites for the mass production of solid-state batteries
Nature Reviews Materials, 2021Li-Zhen Fan, Hongcai He, Ce-Wen Nan
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