Constraining type Ia supernova progenitors

Evan Scannapieco, C. Raskin, M. Della Valle, C. Fryer, J. Rhoads, G. Rockefeller, Francis Timmes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present observational and theoretical studies constraining Type Ia supernova progenitors. First, we use a new observational technique to show that "prompt" SNe Ia that trace star-formation on cosmic timescales exhibit a significant delay time of 200-500 million years. This implies that either the majority of SNe Ia companion stars have main-sequence masses less than three solar masses, or that most SNe Ia arise from double-white dwarf binaries. Second we present a comprehensive study of white dwarf collisions as an avenue for creating SNe Ia. Using a smooth particle hydrodynamics code with a 13-isotope nuclear network, we show that several combinations of white dwarf masses and impact parameters produce enough 56Ni to result in luminosities ranging from those of sub-luminous to super-luminous SNe Ia, depending on the parameters of the collision. Finally, we conduct a simulation survey of double-degenerate white dwarf mergers with varying mass combinations. Unlike previous works, we do not add detonations by hand to our simulations, and we do not find any thermonuclear explosions during the mergers. Instead, all but one of our simulations forms a cold, degenerate core surrounded by a hot disk, while our least massive pair of stars forms only a hot disk. We characterize the remnants by core mass, rotational velocity, and half-mass radius, and discuss how we will evolve them further with simulations that incorporate dissipative processes. Such simulations may indeed lead to double-degenerate Type Ia explosions that occur many orbits after the mergers themselves.

Original languageEnglish (US)
Title of host publicationProceedings of the International Astronomical Union
Pages275-279
Number of pages5
Volume7
EditionS281
DOIs
StatePublished - Jul 2011

Publication series

NameProceedings of the International Astronomical Union
NumberS281
Volume7
ISSN (Print)17439213
ISSN (Electronic)17439221

Fingerprint

supernovae
simulation
thermonuclear explosions
companion stars
collisions
detonation
explosions
star formation
time lag
isotopes
hydrodynamics
luminosity
orbits
stars
radii

Keywords

  • Supernovae

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Scannapieco, E., Raskin, C., Valle, M. D., Fryer, C., Rhoads, J., Rockefeller, G., & Timmes, F. (2011). Constraining type Ia supernova progenitors. In Proceedings of the International Astronomical Union (S281 ed., Vol. 7, pp. 275-279). (Proceedings of the International Astronomical Union; Vol. 7, No. S281). https://doi.org/10.1017/S1743921312015190

Constraining type Ia supernova progenitors. / Scannapieco, Evan; Raskin, C.; Valle, M. Della; Fryer, C.; Rhoads, J.; Rockefeller, G.; Timmes, Francis.

Proceedings of the International Astronomical Union. Vol. 7 S281. ed. 2011. p. 275-279 (Proceedings of the International Astronomical Union; Vol. 7, No. S281).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Scannapieco, E, Raskin, C, Valle, MD, Fryer, C, Rhoads, J, Rockefeller, G & Timmes, F 2011, Constraining type Ia supernova progenitors. in Proceedings of the International Astronomical Union. S281 edn, vol. 7, Proceedings of the International Astronomical Union, no. S281, vol. 7, pp. 275-279. https://doi.org/10.1017/S1743921312015190
Scannapieco E, Raskin C, Valle MD, Fryer C, Rhoads J, Rockefeller G et al. Constraining type Ia supernova progenitors. In Proceedings of the International Astronomical Union. S281 ed. Vol. 7. 2011. p. 275-279. (Proceedings of the International Astronomical Union; S281). https://doi.org/10.1017/S1743921312015190
Scannapieco, Evan ; Raskin, C. ; Valle, M. Della ; Fryer, C. ; Rhoads, J. ; Rockefeller, G. ; Timmes, Francis. / Constraining type Ia supernova progenitors. Proceedings of the International Astronomical Union. Vol. 7 S281. ed. 2011. pp. 275-279 (Proceedings of the International Astronomical Union; S281).
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