A search for environmental effects on type Ia supernovae

Mario Hamuy, S. C. Trager, Philip A Pinto, M. M. Phillips, R. A. Schommer, Valentin Ivanov, Nicholas B. Suntzeff

Research output: Contribution to journalArticle

158 Citations (Scopus)

Abstract

We use integrated colors and B and V absolute magnitudes of Type Ia supernova (SN) host galaxies in order to search for environmental effects on the SN optical properties. With the new sample of 44 SNe we confirm the conclusion by Hamuy et al. that bright events occur preferentially in young stellar environments. We find also that the brightest SNe occur in the least luminous galaxies, a possible indication that metal-poor neighborhoods produce the more luminous events. The interpretation of these results is made difficult, however, because of the fact that galaxies with younger stellar populations are also lower in luminosity. In an attempt to remove this ambiguity, we use models for the line strengths in the absorption spectrum of five early-type galaxies, in order to estimate metallicities and ages of the SN host galaxies. With the addition of abundance estimates from nebular analysis of the emission spectra of three spiral galaxies, we find possible further evidence that luminous SNe are produced in metal-poor neighborhoods. Further spectroscopic observations of the SN host galaxies will be necessary to test these results and assist in disentangling the age and metallicity effects on Type Ia SNe.

Original languageEnglish (US)
Pages (from-to)1479-1486
Number of pages8
JournalAstronomical Journal
Volume120
Issue number3
StatePublished - Sep 2000

Fingerprint

environmental effect
supernovae
galaxies
young population
metal
absorption spectrum
optical property
metallicity
spiral galaxies
estimates
metals
ambiguity
indication
emission spectra
luminosity
absorption spectra
color
optical properties
test
effect

Keywords

  • Distance scale
  • Supernovae: general

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Hamuy, M., Trager, S. C., Pinto, P. A., Phillips, M. M., Schommer, R. A., Ivanov, V., & Suntzeff, N. B. (2000). A search for environmental effects on type Ia supernovae. Astronomical Journal, 120(3), 1479-1486.

A search for environmental effects on type Ia supernovae. / Hamuy, Mario; Trager, S. C.; Pinto, Philip A; Phillips, M. M.; Schommer, R. A.; Ivanov, Valentin; Suntzeff, Nicholas B.

In: Astronomical Journal, Vol. 120, No. 3, 09.2000, p. 1479-1486.

Research output: Contribution to journalArticle

Hamuy, M, Trager, SC, Pinto, PA, Phillips, MM, Schommer, RA, Ivanov, V & Suntzeff, NB 2000, 'A search for environmental effects on type Ia supernovae', Astronomical Journal, vol. 120, no. 3, pp. 1479-1486.
Hamuy M, Trager SC, Pinto PA, Phillips MM, Schommer RA, Ivanov V et al. A search for environmental effects on type Ia supernovae. Astronomical Journal. 2000 Sep;120(3):1479-1486.
Hamuy, Mario ; Trager, S. C. ; Pinto, Philip A ; Phillips, M. M. ; Schommer, R. A. ; Ivanov, Valentin ; Suntzeff, Nicholas B. / A search for environmental effects on type Ia supernovae. In: Astronomical Journal. 2000 ; Vol. 120, No. 3. pp. 1479-1486.
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