The progenitors of subluminous type Ia supernovae

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We find that spectroscopically peculiar subluminous SNe Ia come from an old population. Of the thirteen subluminous SNe Ia known, nine are found in E/S0 galaxies, and the remainder are found in early-type spirals. The probability that this is a chance occurrence is only 0.1%. The finding that subluminous SNe Ia are associated with an older stellar population indicates that for a sufficiently large lookback time (already accessible in current high redshift searches) they will not be found. Due to a scarcity in old populations, hydrogen and helium main sequence stars and He red giant stars that undergo Roche lobe ... continued below

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Howell, D. Andrew February 1, 2001.

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We find that spectroscopically peculiar subluminous SNe Ia come from an old population. Of the thirteen subluminous SNe Ia known, nine are found in E/S0 galaxies, and the remainder are found in early-type spirals. The probability that this is a chance occurrence is only 0.1%. The finding that subluminous SNe Ia are associated with an older stellar population indicates that for a sufficiently large lookback time (already accessible in current high redshift searches) they will not be found. Due to a scarcity in old populations, hydrogen and helium main sequence stars and He red giant stars that undergo Roche lobe overflow are unlikely to be the progenitors of subluminous SNe Ia. Earlier findings that overluminous SNe Ia (DELTA m{sub 15} (B) < 0.94) come from a young progenitor population are confirmed. The fact that subluminous SNe Ia and overluminous SNe Ia come from different progenitor populations and also have different properties is a prediction of the CO white dwarf merger progenitor scenario.

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  • Journal Name: Astrophysical Journal , Letters; Journal Volume: 554; Journal Issue: 2, pt. 2; Other Information: Journal Publication Date: June 20, 2001

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  • Report No.: LBNL--47885
  • Grant Number: AC03-76SF00098
  • DOI: 10.1086/321702 | External Link
  • Office of Scientific & Technical Information Report Number: 787130
  • Archival Resource Key: ark:/67531/metadc720121

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  • February 1, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • April 5, 2016, 5:52 p.m.

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Howell, D. Andrew. The progenitors of subluminous type Ia supernovae, article, February 1, 2001; California. (digital.library.unt.edu/ark:/67531/metadc720121/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.