منابع مشابه
Massive Stars in Transition
We discuss the various post-main sequence phases of massive stars, focusing on Wolf-Rayet stars, Luminous Blue Variables, plus connections with other early-type and late-type supergiants. End states for massive stars are also investigated, emphasising connections between Supernovae originating from core-collapse massive stars and Gamma Ray Bursts.
متن کاملInstabilities in massive stars
A defining property of massive stars is the dominant, dynamical role played by radiation throughout the stellar interior, atmosphere, and wind. Associated with this radiation hydrodynamics are several distinct kinds of instabilities that can lead to convection in both core and envelope, clumping in atmosphere and wind outflow, and perhaps even the dramatic mass loss outbursts associated with Lu...
متن کاملChemical abundances and winds of massive stars in M31: a B-type supergiant and a WC star in OB10
We present high quality spectroscopic data for two massive stars in the OB10 association of M31, OB10–64 (B0 Ia) and OB10-WR1 (WC6). Medium resolution spectra of both stars were obtained using the ISIS spectrograph on the William Hershel Telescope. This is supplemented with HST-STIS UV spectroscopy and Keck I HIRES data for OB10–64. A non-LTE model atmosphere and abundance analysis for OB10–64 ...
متن کاملMicrolensing by Stars in the Disk of M31
The optical depth to microlensing toward M31 due to known stars in the disk of M31 itself is τ ∼ 2 × 10 −7 e −r/d where d is the disk scale length and r is the distance along the major axis. Thus, there can be significant lensing toward the M31 disk even if M31 contains no dark compact objects. The optical depth has a strong dependence on azimuthal angle: at fixed radius τ ∝ [1 + (h/d) tan i co...
متن کاملCold Massive Molecular Clouds in the Inner Disk of M31
We present new interferometric CO(1-0) and single-dish CO(3-2) observations of the central parts of D478, a large (> 200 pc) dark dust cloud located in a quiescent region of the inner disk of M31 where single-dish CO(1-0) and CO(2-1) observations were previously obtained. Only a small fraction (< 15%) of the CO(1-0) flux previously detected in this region with the single-dish telescope is recor...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2016
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921317002599