منابع مشابه
Supernovae and Their Massive Star Progenitors
I briefly describe the Lick Observatory Supernova Search with the 0.76-m Katzman Automatic Imaging Telescope. I then present an overview of optical observations of Type II, IIb, Ib, and Ic supernovae (SNe), all of which are thought to arise from core collapse in massive progenitors that have previously experienced different amounts of mass loss. SNe IIn are distinguished by relatively narrow em...
متن کاملProgenitors of core-collapse supernovae
Knowledge of the progenitors of core-collapse supernovae is a fundamental component in understanding the explosions. The recent progress in finding such stars is reviewed. The minimum initial mass that can produce a supernova has converged to 8± 1M⊙, from direct detections of red supergiant progenitors of II-P SNe and the most massive white dwarf progenitors, although this value is model depend...
متن کاملDouble degenerates and progenitors of supernovae type
We report on systematic radial velocity surveys for white dwarf – white dwarf binaries (double degenerates – DDs) including SPY (ESO Supernovae Ia progenitor survey) recently carried out at the VLT. A large sample of DD will allow us to put strong constrains on the phases of close binary evolution of the progenitor systems and to perform an observational test of the DD scenario for supernovae o...
متن کاملYOUNG AND MASSIVE BINARY PROGENITORS OF TYPE Ia SUPERNOVAE AND THEIR CIRCUMSTELLAR MATTER
We present new evolutionary models for Type Ia supernova (SN Ia) progenitors, where we include massstripping effect on a main-sequence (MS) or slightly evolved companion star by winds from a mass-accreting white dwarf (WD). The mass-stripping attenuates the rate of mass transfer from the companion to the WD. As a result, quite a massive MS companion can avoid forming a common envelope to increa...
متن کاملThe Progenitors of Type Ia Supernovae
Type Ia supernovae (SNe Ia) occur in both old, passive galaxies and active, star-forming galaxies. This fact, coupled with the strong dependence of SN Ia rate on star formation rate, suggests that SNe Ia form from stars with a wide range of ages. Here we show that the rate of SN Ia explosions is about 1% of the stellar death rate, independent of star formation history. The dependence of SN Ia r...
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ژورنال
عنوان ژورنال: Europhysics News
سال: 1985
ISSN: 0531-7479,1432-1092
DOI: 10.1051/epn/19851607005