2005/09/30 by Brian J. Barris, John L. Tonry · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/498292
published as Astrophys.J.637:427-438,2006 · 37 pages, 9 figures, accepted for publication in Astrophysical Journal. Figures 7-9 corrected
arxiv created 2005/12/02 · openalex publication_date 2006/01/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We derive the rates of Type Ia supernovae (SNe Ia) over a wide range of redshifts using a complete sample from the IfA Deep Survey. This sample of more than 100 SNe Ia is the largest set ever collected from a single survey and therefore uniquely powerful for a detailed supernova rate (SNR) calculation. Measurements of the SNR as a function of cosmological time offer a glimpse into the relationship between the star formation rate (SFR) and Type Ia SNR and may provide evidence for the progenitor pathway. We observe a progressively increasing Type Ia SNR between redshifts z ≈ 0.3 and 0.8. The Type Ia SNR measurements are consistent with a short time delay ( t ≈ 1 Gyr) with respect to the SFR, indicating a fairly prompt evolution of SN Ia progenitor systems. We derive a best-fit value of SFR/SNR ≈ 580 h M ☉ per SN Ia for the conversion factor between the star formation and the SN Ia rates, as determined for a delay time of t ≈ 1 Gyr between the SFR and the Type Ia SNR. More complete measurements of the Type Ia SNR at z > 1 are necessary to conclusively determine the SFR-SNR relationship and constrain SN Ia evolutionary pathways.