The type Ia supernova width-luminosity relation

Philip A Pinto, Ronald G. Eastman

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Observations of type Ia supernovæ at high redshifts have become an important tool for studying the geometry of the universe. The relation between the duration of the peak phase of a type Ia supernova's lightcurve and its luminosity (broader is brighter) forms the cornerstone of this measurement, yet it is a purely empirical relation. In this paper we show that the relation is a natural consequence of the radiation transport in type Ia supernovae and suggest constraints on the nature of the explosions which arise from our interpretation of the observed relation. The principle parameter underlying the relation is the mass of radioactive 56Ni produced in the explosion. The relation is shown to be relatively insensitive to most other parameters in Chandrasekhar-mass explosions. Cosmological results are thus unlikely to suffer from systematic effects stemming from evolution in the explosions' progenitors.

Original languageEnglish (US)
Pages (from-to)307-319
Number of pages13
JournalNew Astronomy
Volume6
Issue number5
StatePublished - Aug 2001
Externally publishedYes

Fingerprint

Explosions
supernovae
explosions
explosion
Luminance
luminosity
radiation transport
universe
Radiation
geometry
Geometry
Supernovae
parameter

Keywords

  • 95.30.J
  • 97.60.B
  • 98.80
  • Distance scale
  • Radiative transfer
  • Supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

The type Ia supernova width-luminosity relation. / Pinto, Philip A; Eastman, Ronald G.

In: New Astronomy, Vol. 6, No. 5, 08.2001, p. 307-319.

Research output: Contribution to journalArticle

Pinto, PA & Eastman, RG 2001, 'The type Ia supernova width-luminosity relation', New Astronomy, vol. 6, no. 5, pp. 307-319.
Pinto, Philip A ; Eastman, Ronald G. / The type Ia supernova width-luminosity relation. In: New Astronomy. 2001 ; Vol. 6, No. 5. pp. 307-319.
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