Results 11 to 20 of about 18,407 (265)
Model Dust Envelopes for Asymptotic Giant Branch Stars. Carbon Stars. II. Carbon Stars [PDF]
Journal of Astronomy and Space Sciences, 1995 We have modeled the dust envelopes around carbon stars with close attention to the evolution of the structure of the dust shells. We use various dust density distributions to take account the effect of the superwind due to the helium shell flash by ...
Kyung-Won Suh, Hee-Joung Kwoun
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The carbon stars adventure [PDF]
Proceedings of the International Astronomical Union, 2015 info:eu-repo/semantics ...
Rau, Gioia +6 more
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CARBON NEUTRON STAR ATMOSPHERES [PDF]
The Astrophysical Journal Supplement Series, 2013 The accuracy of measuring the basic parameters of neutron stars is limited in particular by uncertainties in chemical composition of their atmospheres. For example, atmospheres of thermally - emitting neutron stars in supernova remnants might have exotic chemical compositions, and for one of them, the neutron star in CasA, a pure carbon atmosphere has ...
Suleimanov V. +3 more
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A Catalogue of carbon stars in the LMC [PDF]
Astronomy & Astrophysics, 2001 A catalogue of 7760 carbon stars in the Large Magellenic Cloud is presented. The stars were identified during a systematic survey of objective-prism plates taken with the UK 1.2 m Schmidt Telescope. The catalogue is compared with other lists of carbon stars and the distribution of the carbon stars is discussed.
Kontizas, E. +3 more
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Witnessing the emergence of a carbon star [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2015 Abstract During the late stages of their evolution, Sun-like stars bring the products of nuclear burning to the surface. Most of the carbon in the Universe is believed to originate from stars with masses up to a few solar masses. Although there is a chemical dichotomy between oxygen-rich and carbon-rich evolved stars, the dredge-up ...
Zijlstra, Albert; id_orcid 0000-0002-3171-5469 +12 more
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Are there carbon stars in the Bulge? [PDF]
Symposium - International Astronomical Union, 1999 The Bulge carbon stars have been a mystery since their discovery by Azzopardi et al. (1991), because they are about too faint to be regarded as genuine AGB stars, if located inside the metal-rich Bulge . Part of the mystery can be solved if these carbon stars are related to the Sagittarius dwarf galaxy .
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Interpretation of Carbon Stars [PDF]
Symposium - International Astronomical Union, 1974 This communication aims at presenting the results of a research, whose purposes are to gain some insight into the evolutionary state of C stars, when the assumption is made that the main features of their spectra are due to mixing of the envelope with thermonuclear processed layers.
C. Barbaro, N. Dallaporta
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Stabilizing carbon-lithium stars
Physical Chemistry Chemical Physics, 2011 We have explored in silico the potential energy surfaces of the C(5)Li(n)(n-6) (n = 5, 6, and 7) clusters using the Gradient Embedded Genetic Algorithm (GEGA) and other computational strategies. The most stable forms of C(5)Li(5)(-) and C(5)Li(6) are two carbon chains linked by two lithium atoms in a persistent seven membered ring capped by two Li ...
Perez-Peralta, Nancy +5 more
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The absolute magnitudes of carbon stars - Carbon stars in binary systems
The Astrophysical Journal, 1975 Absolute visual magnitudes have been determined for carbon stars belonging to binary systems. These range from about 0 to brighter than -4, with a mean value of -2.3 for N stars. Bolometric corrections are deduced, giving bolometric absolute magnitudes in the range -4 to -8.
B. I. Olson, H. B. Richer
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Nuclear Physics A, 2005 The triple alpha process plays an important role in the production of 12C in stars. Its rate is known with an accuracy of about 12%. We examine the corresponding uncertainties introduced in the description of pre-supernova stars, of nucleosynthesis in a core-collapse SN explosion, and of the production of 12C during the third dredge-up in asymptotic ...
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