منابع مشابه
The Type IIb SN 2011dh: Two years of observations and modelling of the lightcurves ⋆⋆⋆
We present optical and near-infrared (NIR) photometry and spectroscopy as well as modelling of the lightcurves of the Type IIb supernova (SN) 2011dh. Our extensive dataset, for which we present the observations obtained after day 100, spans two years, and complemented with Spitzer mid-infrared (MIR) data, we use it to build an optical-to-MIR bolometric lightcurve between days 3 and 732. To mode...
متن کاملThe type IIb SN 2008ax: the nature of the progenitor
A source coincident with the position of the type IIb supernova (SN) 2008ax is identified in pre-explosion HST WFPC2 observations in three optical filters. We identify and constrain two possible progenitor systems: (1) a single massive star that lost most of its hydrogen envelope through radiatively driven mass loss processes, prior to exploding as a helium-rich Wolf-Rayet star with a residual ...
متن کاملThe Type IIb SN 2008ax: spectral and light curve evolution
We present spectroscopy and photometry of the He-rich supernova (SN) 2008ax. The earlytime spectra show prominent P-Cygni H lines, which decrease with time and disappear completely about 2 months after the explosion. In the same period He I lines become the most prominent spectral features. SN 2008ax displays the ordinary spectral evolution of a Type IIb supernova. A stringent pre-discovery lim...
متن کاملOptical Spectroscopy of the Somewhat Peculiar Type Iib Supernova 2001ig
Here we present previously unpublished optical spectra of supernova (SN) 2001ig, a Type IIb SN, from about a week after explosion until nearly one year later. The earliest spectrum consists of only a few broad absorption features, but soon more common Type II SN features including hydrogen P-Cygni profiles and helium absorption become apparent. At later times, as the H features fade and the He ...
متن کاملOPTICAL SPECTROPOLARIMETRY AND ASPHERICITY OF TYPE Ic SN 2007
We present optical spectropolarimetric observations of Type Ic supernova (SN) 2007gr with Subaru telescope at 21 days after the maximum brightness (∼ 37 days after the explosion). Non-zero polarization as high as ∼ 3 % is observed at the absorption feature of Ca ii IR triplet. The polarization of the continuum light is ∼ 0.5% if we assume an interstellar polarization (ISP) with which SN photosp...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2013
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s174392131300971x