HdBe stars: hydrogen-deficient supergiants with emission lines
نویسندگان
چکیده
منابع مشابه
On the formation of hydrogen-deficient post-AGB stars
We present an evolutionary sequence of a low mass star from the Asymptotic Giant Branch (AGB) through its postAGB stage, during which its surface chemical composition changes from hydrogen-rich to strongly hydrogen-deficient as consequence of a very late thermal pulse, following the socalled born-again scenario. The internal structure and abundance changes during this pulse are computed with a ...
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Westudy the radiative transfer processes occurring in a plane-parallel slab standing vertically above the chromosphere and moving upward as a solid body. This structure simulates a prominence in the phase of eruption or a quiescent prominence where the plasma presents bulk velocities. We use partial redistribution for the description of the resonance scattering in the hydrogen Lα and Lβ lines. ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1994
ISSN: 0074-1809
DOI: 10.1017/s0074180900215210