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dc.contributor.authorChapman, R.
dc.contributor.authorLevan, A.
dc.contributor.authorPriddey, R.
dc.contributor.authorTanvir, N.
dc.contributor.authorWynn, G.
dc.contributor.authorKing, A.R.
dc.contributor.authorDavies, M.B.
dc.date.accessioned2008-02-01T11:36:06Z
dc.date.available2008-02-01T11:36:06Z
dc.date.issued2007
dc.identifier.citationChapman , R , Levan , A , Priddey , R , Tanvir , N , Wynn , G , King , A R & Davies , M B 2007 , Soft Gamma Repeaters and Short Gamma Ray Bursts: Making Magnetars from WD WD Mergers . in In: 15th European Workshop on White Dwarfs - ASP Conf Series 372 . Astronomical Society of the Pacific , pp. 415-8 .
dc.identifier.isbn978-1-58381-239-6
dc.identifier.isbn978-1-58381-306-5
dc.identifier.otherPURE: 148955
dc.identifier.otherPURE UUID: c33bb6ab-9815-43d2-a9bb-d197a9a97a4a
dc.identifier.otherdspace: 2299/1510
dc.identifier.urihttp://hdl.handle.net/2299/1510
dc.descriptionOriginal paper can be found at: http://www.astrosociety.org/pubs/cs/361.html--Copyright Astronomical Society of the Pacific
dc.description.abstractRecent progress on the nature of short duration Gamma Ray Bursts (GRBs) has shown that a fraction of them originate in the local universe. These systems may well be the result of giant flares from Soft Gamma Repeaters (SGRs) believed to be magnetars (neutron stars with extremely large magnetic fields ≥ 1014G). If these magnetars are formed via the core collapse of massive stars, then it would be expected that the bursts should originate from predomi- nantly young stellar populations. However, correlating the positions of BATSE short bursts with structure in the local universe reveals a correlation with all galaxy types, including those with little or no ongoing star formation. This is a natural outcome if, in addition to magnetars forming via the core collapse of massive stars, they also form via accretion induced collapse following the merger of two white dwarfs (WDs), one of which is magnetic. We investigate this possi- bility and find that the rate of magnetar production via WD–WD mergers in the Milky Way is comparable to the rate of production via core collapse. However, while the rate of magnetar production by core collapse is proportional to the star formation rate, the rate of production via WD–WD mergers (which have long lifetimes) is proportional to the stellar mass density, which is concentrated in early-type systems. Therefore magnetars produced via WD–WD mergers may produce SGR giant flares which can be identified with early-type galaxies. We also comment on the possibility that this mechanism could produce a fraction of the observed short duration GRB population at low redshift.en
dc.language.isoeng
dc.publisherAstronomical Society of the Pacific
dc.relation.ispartofIn: 15th European Workshop on White Dwarfs - ASP Conf Series 372
dc.rightsOpen
dc.titleSoft Gamma Repeaters and Short Gamma Ray Bursts: Making Magnetars from WD WD Mergersen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted2007
rioxxterms.typeOther
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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