The Multi-Epoch Nearby Cluster Survey: Type Ia supernova rate measurement in z 0.1 clusters and the late-time delay time distribution

David J. Sand, Melissa L. Graham, Chris Bildfell, Dennis F Zaritsky, Chris Pritchet, Henk Hoekstra, Dennis W. Just, Stéphane Herbert-Fort, Suresh Sivanandam, Ryan J. Foley, Andisheh Mahdavi

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Abstract

We describe the Multi-Epoch Nearby Cluster Survey, designed to measure the cluster Type Ia supernova (SN Ia) rate in a sample of 57 X-ray selected galaxy clusters, with redshifts of 0.05 < z < 0.15. Utilizing our real-time analysis pipeline, we spectroscopically confirmed twenty-three cluster SNe Ia, four of which were intracluster events. Using our deep Canada-France-Hawaii Telescope/MegaCam imaging, we measured total stellar luminosities in each of our galaxy clusters, and we performed detailed supernova (SN) detection efficiency simulations. Bringing these ingredients together, we measure an overall cluster SN Ia rate within R200 (1Mpc) of 0.042+0.012 -0.010 +0.010-0.008 SNuM (0.049 +0.016-0.014 +0.005-0.004 SNuM) and an SN Ia rate within red-sequence galaxies of 0.041+0.015 -0.015 +0.005-0.010 SNuM (0.041 +0.019-0.015 +0.005-0.004 SNuM). The red-sequence SN Ia rate is consistent with published rates in early-type/elliptical galaxies in the "field." Using our red-sequence SN Ia rate, and other cluster SN measurements in early-type galaxies up to z 1, we derive the late-time (>2Gyr) delay time distribution (DTD) of SN Ia assuming a cluster early-type galaxy star formation epoch of zf = 3. Assuming a power-law form for the DTD, Ψ(t)ts , we find s = -1.62 0.54. This result is consistent with predictions for the double degenerate SN Ia progenitor scenario (s ∼ -1) and is also in line with recent calculations for the double detonation explosion mechanism (s ∼ -2). The most recent calculations of the single degenerate scenario DTD predicts an order-of-magnitude drop-off in SN Ia rate ∼6-7Gyr after stellar formation, and the observed cluster rates cannot rule this out.

Original languageEnglish (US)
Article number163
JournalAstrophysical Journal
Volume746
Issue number2
DOIs
StatePublished - Feb 20 2012

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supernovae
time lag
time measurement
explosion
galaxies
power law
detonation
explosions
star formation
prediction
rate
distribution
predictions
calculation
x rays

Keywords

  • galaxies: clusters: general
  • supernovae: general

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

The Multi-Epoch Nearby Cluster Survey : Type Ia supernova rate measurement in z 0.1 clusters and the late-time delay time distribution. / Sand, David J.; Graham, Melissa L.; Bildfell, Chris; Zaritsky, Dennis F; Pritchet, Chris; Hoekstra, Henk; Just, Dennis W.; Herbert-Fort, Stéphane; Sivanandam, Suresh; Foley, Ryan J.; Mahdavi, Andisheh.

In: Astrophysical Journal, Vol. 746, No. 2, 163, 20.02.2012.

Research output: Contribution to journalArticle

Sand, DJ, Graham, ML, Bildfell, C, Zaritsky, DF, Pritchet, C, Hoekstra, H, Just, DW, Herbert-Fort, S, Sivanandam, S, Foley, RJ & Mahdavi, A 2012, 'The Multi-Epoch Nearby Cluster Survey: Type Ia supernova rate measurement in z 0.1 clusters and the late-time delay time distribution', Astrophysical Journal, vol. 746, no. 2, 163. https://doi.org/10.1088/0004-637X/746/2/163
Sand, David J. ; Graham, Melissa L. ; Bildfell, Chris ; Zaritsky, Dennis F ; Pritchet, Chris ; Hoekstra, Henk ; Just, Dennis W. ; Herbert-Fort, Stéphane ; Sivanandam, Suresh ; Foley, Ryan J. ; Mahdavi, Andisheh. / The Multi-Epoch Nearby Cluster Survey : Type Ia supernova rate measurement in z 0.1 clusters and the late-time delay time distribution. In: Astrophysical Journal. 2012 ; Vol. 746, No. 2.
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