Late-Phase Observations of a Super-Chandrasekhar SN Ia
نویسندگان
چکیده
منابع مشابه
ON SN 2003fg: THE PROBABLE SUPER-CHANDRASEKHAR-MASS SN Ia
Howell et al. have reported the discovery of SN Ia SN 2003fg (SNLS-03D3bb) and conclude that SN 2003fg is very likely a super-Chandrasekhar-mass SN Ia perhaps with a mass∼ 2M⊙. Their work is the first strong evidence that has been presented for a super-Chandrasekhar SN Ia. We have performed an analysis of the SN 2003fg data using the Yoon & Langer binding energy formula for a rotating super-Cha...
متن کاملOn the Progenitors of Super-chandrasekhar Mass Type Ia Supernovae
Type Ia supernovae (SNe Ia) can be used as the standard candlelight to determine the cosmological distances because they are thought to have a uniform fuel amount. Recent observations of several overluminous SNe Ia suggest that the white dwarf masses at supernova explosion may significantly exceed the canonical Chandrasekhar mass limit. These massive white dwarfs may be supported by rapid diffe...
متن کامل‘ Super - Chandrasekhar ’ Type Ia Supernovae at nebular epochs ⋆
We present a first systematic comparison of superluminous Type Ia supernovae (SNe Ia) at late epochs, including previously unpublished photometric and spectroscopic observations of SN 2007if, SN 2009dc and SNF20080723-012. Photometrically, the objects of our sample show a diverse late-time behaviour, some of them fading quite rapidly after a light-curve break at ∼ 150–200d. The latter is likely...
متن کاملLate - time emission of type Ia supernovae : optical and near - infrared observations of SN 2001 el ⋆
Aims. To elucidate the nature of the late-phase emission of the normal type Ia supernova SN 2001el. Methods. We present optical and near-infrared light curves of SN 2001el from 310 to 445 days past maximum light, obtained with the Very Large Telescope. Results. The late-time optical (U BV RI) light curves decay in a nearly linear fashion with decay time scales of 1. In contrast, in the near-inf...
متن کاملOff - center explosions of Chandrasekhar - mass white dwarfs : an explanation of super - bright type Ia supernovae ?
Context. The recent discovery of a very bright type Ia supernova, SNLS-03D3bb (≡ SN 2003fg), in the Supernova Legacy Survey (SNLS) has raised the question of whether super-Chandrasekhar-mass white dwarf stars are needed to explain such explosions. In principle, such a progenitor could form by the mergers of two rather massive white dwarfs. Aims. Binary systems of two white dwarfs in close orbit...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2011
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921312015281