TWO DISTINCT-ABSORPTION X-RAY COMPONENTS FROM TYPE IIn SUPERNOVAE: EVIDENCE FOR ASPHERICITY IN THE CIRCUMSTELLAR MEDIUM
نویسندگان
چکیده
منابع مشابه
Evidence for Asphericity in the Type IIn Supernova 1998S
We present optical spectropolarimetry obtained at the Keck-II 10-m telescope on 1998 March 7 UT along with total flux spectra spanning the first 494 days after discovery (1998 March 2 UT) of the peculiar type IIn supernova (SN) 1998S. The SN is found to exhibit a high degree of linear polarization, implying significant asphericity for its continuum-scattering environment. Prior to removal of th...
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Supernovae have been confirmed to redshift z ∼ 1.7 [1, 2] for type Ia (thermonuclear detonation of a white dwarf) and to z ∼ 0.7 [1, 3, 4, 5] for type II (collapse of the core of the star). The subclass type IIn [6] supernovae are luminous [7, 8, 9] core-collapse explosions of massive stars [8, 9, 10, 11] and, unlike other types, are very bright in the ultraviolet [12, 13, 14, 15], which should...
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The source of the large amounts of dust observed in high redshift galaxies has remained uncertain for nearly 40 years. Despite the success of models in producing dust within supernova explosions, only a handful of supernovae show direct observational evidence for dust condensation, and these examples all yield 2-3 orders of magnitude less dust than predicted by the models. Recent observations s...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2016
ISSN: 1538-4357
DOI: 10.3847/0004-637x/832/2/194