Mathematics – Logic
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3288l&link_type=abstract
ATNF proposal C1303, Semester: April, 2010
Mathematics
Logic
Late Stages Of Stellar Evolution (Excluding Pulsars And Supernovae), Supernovae / Supernovae Remnants, Atca
Scientific paper
We still lack knowledge about the origin of thermonuclear supernovae (SN Ia) despite their huge cosmological and galactochemical importance. It seems likely that the evolution leading up to the SN Ia explosion involves mass transfer from a companion star onto the progenitor white dwarf. Detecting the wind from a companion in such a binary system would offer a breakthrough in our understanding of the progenitors of SN Ia. We request observations using the ATCA array primarily at 3 cm of a nearby (D<20 Mpc) SN Ia, scheduled as soon as possible after its detection, making this a NAPA proposal. It is essential that initial observations are performed early after the explosion, because the dense circumstellar could be overtaken quickly, thus making the SN fade away rapidly. We require up to three runs of deep radio observations, each separated by roughly 2 weeks. We will coordinate our observations with programs in the optical, and for a few specific cases we may request late follow-ups.
Bjornsson Claes-Ingvar
Fransson Claes
Lundqvist Peter
Perez Torres Miguel Angel
Ryder Stuart
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