منابع مشابه
Why Do Low-Mass Stars Become Red Giants?
We revisit the problem of why stars become red giants. We modify the physics of a standard stellar evolution code in order to determine what does and what does not contribute to a star becoming a red giant. In particular, we have run tests to try to separate the effects of changes in the mean molecular weight and in the energy generation. The implications for why stars become red giants are dis...
متن کاملMass-loss from Red Giants
Although much is known about the nature of winds from hot stars and giants and supergiants with spectral types earlier than K, there is still much to be learned regarding the mass-loss process in cool, late-type stars. We will review the current state of research, with particular reference to observations and modelling of mass-loss from giant stars in symbiotic systems.
متن کاملar X iv : 0 90 2 . 04 06 v 1 [ as tr o - ph . S R ] 2 F eb 2 00 9 Why Do Low - Mass Stars Become Red Giants ?
We revisit the problem of why stars become red giants. We modify the physics of a standard stellar evolution code in order to determine what does and what does not contribute to a star becoming a red giant. In particular, we have run tests to try to separate the effects of changes in the mean molecular weight and in the energy generation. The implications for why stars become red giants are dis...
متن کاملWhy Hot Horizontal Branch Stars Can Appear Redder Than Red Giants ⋆
In this paper we report on a curious feature in the V , (U − B) color-magnitude diagrams of globular clusters. In our database, we find that a considerable fraction of blue horizontal branch stars, hotter than the instability strip and cooler than the Grundahl et al. (1999) jump (i.e., 6000 ≤ Teff(K)≤ 10000), have (U − B) colors redder than their red giant progenitors. This red incursion is not...
متن کاملThe Link between Symbiotic Stars and Chemically-peculiar Red Giants
Barium stars and technetium-poor, extrinsic S stars are binary systems with a white dwarf companion, and with orbital elements similar to those of symbiotic systems. One may thus wonder whether these various families of binary systems involving red giant stars are somehow related. This question is actually twofold: (i) Do barium and binary S stars exhibit some symbiotic activity? (ii) Do symbio...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Australia
سال: 2009
ISSN: 1323-3580,1448-6083
DOI: 10.1071/as08060