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The Subluminous Sup...
The Subluminous Supernova 2007qd : A Missing Link in a Family of Low-luminosity Type Ia Supernovae
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McClelland, Colin M. (author)
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Garnavich, Peter M. (author)
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Galbany, Lluís (author)
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Miquel, Ramon (author)
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Foley, Ryan J. (author)
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Filippenko, Alexei V. (author)
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Bassett, Bruce (author)
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Wheeler, J. Craig (author)
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- Goobar, Ariel (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),CoPS
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Jha, Saurabh W. (author)
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Sako, Masao (author)
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Frieman, Joshua A. (author)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Vinko, Jozsef (author)
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Schneider, Donald P. (author)
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(creator_code:org_t)
- 2010
- 2010
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 720:1, s. 704-716
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We present multi-band photometry and multi-epoch spectroscopy of the peculiar Type Ia supernova (SN Ia) 2007qd, discovered by the SDSS-II Supernova Survey. It possesses physical properties intermediate to those of the peculiar SN 2002cx and the extremely low-luminosity SN 2008ha. Optical photometry indicates that it had an extraordinarily fast rise time of lsim10 days and a peak absolute B magnitude of -15.4 ± 0.2 at most, making it one of the most subluminous SN Ia ever observed. Follow-up spectroscopy of SN 2007qd near maximum brightness unambiguously shows the presence of intermediate-mass elements which are likely caused by carbon/oxygen nuclear burning. Near maximum brightness, SN 2007qd had a photospheric velocity of only 2800 km s-1, similar to that of SN 2008ha but about 4000 and 7000 km s-1 less than that of SN 2002cx and normal SN Ia, respectively. We show that the peak luminosities of SN 2002cx like objects are highly correlated with both their light-curve stretch and photospheric velocities. Its strong apparent connection to other SN 2002cx like events suggests that SN 2007qd is also a pure deflagration of a white dwarf, although other mechanisms cannot be ruled out. It may be a critical link between SN 2008ha and the other members of the SN 2002cx like class of objects.
Keyword
- NATURAL SCIENCES
- NATURVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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McClelland, Coli ...
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Garnavich, Peter ...
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Galbany, Lluís
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Miquel, Ramon
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Foley, Ryan J.
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Filippenko, Alex ...
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show more...
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Bassett, Bruce
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Wheeler, J. Crai ...
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Goobar, Ariel
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Jha, Saurabh W.
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Sako, Masao
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Frieman, Joshua ...
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Sollerman, Jespe ...
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Vinko, Jozsef
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Schneider, Donal ...
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show less...
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Astrophysical Jo ...
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Stockholm University