YOUNG AND MASSIVE BINARY PROGENITORS OF TYPE Ia SUPERNOVAE AND THEIR CIRCUMSTELLAR MATTER

Content Provider	Semantic Scholar
Author	Hachisu, Izumi Kato, Mariko
Copyright Year	2008
Abstract	We present new evolutionary models for Type Ia supernova (SN Ia) progenitors, introducing mass-stripping effect on a main-sequence (MS) or slightly evolved companio n star by winds from a mass-accreting white dwarf (WD). The mass-stripping attenuates the rate of mass t r nsfer from the companion to the WD. As a result, quite a massive MS companion can avoid forming a comm n envelope and increase the WD mass up to the SN Ia explosion. Including the mass-stripping effect , we follow binary evolutions of various WD + MS systems and obtain the parameter region in the initial donor mass – orbital period plane where SNe Ia occur. The newly obtained SN Ia region extends to donor masses of 6 − 7 M⊙, although its extension depends on the efficiency of mass-stripping effect. The stripped matte r would mainly be distributed on the orbital plane and form very massive circumstellar matter (CSM) around the SN Ia progenitor. It can explain massive CSM around SNe Ia/IIn(IIa) 2002ic and 2005gj as well as tenuous C SM around normal SN Ia 2006X. Our new model suggests the presence of very young ( . 108 yr) populations of SNe Ia, being consistent with recent observational indications of young population SNe Ia. Subject headings: binaries: close — circumstellar matter — stars: winds, outfl ws — supernovae: individual (SN2002ic, SN 2005gj, SN 2006X)
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://arxiv.org/pdf/0710.0319v2.pdf
Language	English
Access Restriction	Open
Subject Keyword	Command & Conquer:Yuri's Revenge Common Security Module Community Climate System Model DWARF Environmental Wind GUCY2C protein, human Leukoencephalopathies Matte display Medical Subject Headings Molecular orbital Pierre Robin Syndrome Population Parameter Stars, Celestial
Content Type	Text
Resource Type	Article