The rate of Type-Ia supernovae in galaxy clusters and the delay-time distribution out to redshift 1.75

被引：38

作者：

Friedmann, Matan ^{[1
]}

Maoz, Dan ^{[1
]}

机构：

[1] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 479卷 / 03期

基金：

以色列科学基金会;

关键词：

surveys; supernovae: general; galaxies: clusters; INITIAL MASS FUNCTION; SPT-CL J2040-4451; STAR-FORMATION; RED-SEQUENCE; COSMOLOGICAL CONSTRAINTS; EARLY UNIVERSE; LEGACY SURVEY; SDSS-II; HUBBLE; FIELD;

D O I：

10.1093/mnras/sty1664

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The observed delay-time distribution (DTD) of Type-Ia supernovae (SNe Ia) is a valuable probe of SN Ia progenitors and physics, and of the role of SNe Ia in cosmic metal enrichment. The SN Ia rate in galaxy clusters as a function of cluster redshift is an almost-direct measure of the DTD, but current estimates have been limited out to a mean redshift < z > = 1.1, corresponding to time delays, after cluster star formation, of greater than or similar to 3.2Gyr. We analyze data from a Hubble Space Telescope monitoring project of 12 galaxy clusters at z = 1.13-1.75, where we discover 29 SNe, and present their multiband light curves. Based on the SN photometry and the apparent host galaxies, we assess cluster membership and SN type, finding 11 cases that are likely SNe Ia in cluster galaxies and 4 more cases, which are possible but not certain cluster SNe Ia. We conduct simulations to estimate the SN detection efficiency, the experiment's completeness, and the photometric errors, and perform photometry of the cluster galaxies to derive the cluster stellar masses. With this input, we obtain a mean < z > = 1.35 cluster rest-frame SN Ia rate per unit formed stellar mass of R-Ia,R- m* = 2.6(-1.5)(+3.2) x 10(-13) yr(-1) M-circle dot(-1). Separating the cluster sample into high-z and low-z bins, the rates are 2.2(-1.3)(+2.6) x 10(-13) yr(-1) M-circle dot(-1) at < z > = 1.25, and 3.5(-2.8)(+6.6) x 10(-13) yr(-1) M-circle dot(-1) at < z > = 1.58. Combining our results with previous cluster SN Ia rates, we fit the DTD, now down to delays of 1.5 Gyr, with a power-law dependence, t(alpha), with alpha = -1.30(-0.16)(+0.23). We confirm previous indications for a SN Ia production efficiency that is several times higher in galaxy clusters than in the field, perhaps caused by a peculiar stellar initial mass function in clusters, or by a higher incidence of binaries that will evolve into SNe Ia.

引用

页码：3563 / 3581

页数：19

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