SUBLUMINOUS TYPE Ia SUPERNOVAE AT HIGH REDSHIFT FROM THE SUPERNOVA LEGACY SURVEY

被引：29

作者：

Gonzalez-Gaitan, S. ^{[1
]}

Perrett, K. ^{[1
,2
]}

Sullivan, M. ^{[3
]}

Conley, A. ^{[1
,4
]}

Howell, D. A. ^{[5
,6
]}

Carlberg, R. G. ^{[1
]}

Astier, P. ^{[7
]}

Balam, D. ^{[8
]}

Balland, C. ^{[7
]}

Basa, S. ^{[9
]}

Fouchez, D. ^{[10
,11
]}

Guy, J. ^{[7
]}

Hardin, D. ^{[7
]}

Hook, I. M. ^{[8
,12
]}

Pain, R. ^{[7
]}

Pritchet, C. J. ^{[13
]}

Regnault, N. ^{[7
]}

Rich, J. ^{[14
]}

Lidman, C. ^{[15
]}

机构：

[1] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada

[2] DRDC Ottawa, Network Informat Operat, Ottawa, ON K1A 0Z4, Canada

[3] Univ Oxford, Dept Phys Astrophys, DWB, Oxford OX1 3RH, England

[4] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA

[5] Las Cumbres Observ Global Telescope Network, Goleta, CA 93117 USA

[6] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[7] Univ Paris 07, Univ Paris 06, LPNHE, CNRS,IN2P3, F-75252 Paris 05, France

[8] Herzberg Inst Astrophys, Dominion Astrophys Observ, Victoria, BC V9E 2E7, Canada

[9] Lab Astrophys Marseille, F-13388 Marseille 13, France

[10] CNRS IN2P3, CPPM, F-13288 Marseille 9, France

[11] Univ Aix Marseille 2, F-13288 Marseille 9, France

[12] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, RM, Italy

[13] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada

[14] CEA Saclay, DSM IRFU SPP, F-91191 Gif Sur Yvette, France

[15] Australian Astron Observ, Epping, NSW 1710, Australia

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 727卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

supernovae:; general; DELAY-TIME DISTRIBUTION; WHITE-DWARFS; LIGHT CURVES; OBSERVATIONAL CONSTRAINTS; OPTICAL PHOTOMETRY; CARBON IGNITION; STAR-FORMATION; MASSIVE STARS; NEUTRON-STARS; DEEP SURVEY;

D O I：

10.1088/0004-637X/727/2/107

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The rate evolution of subluminous Type Ia supernovae (SNe Ia) is presented using data from the Supernova Legacy Survey. This sub-sample represents the faint and rapidly declining light curves of the observed SN Ia population here defined by low-stretch values (s <= 0.8). Up to redshift z = 0.6, we find 18 photometrically identified subluminous SNe Ia, of which six have spectroscopic redshift (and three are spectroscopically confirmed SNe Ia). The evolution of the subluminous volumetric rate is constant or slightly decreasing with redshift, in contrast to the increasing SN Ia rate found for the normal stretch population, although a rising behavior is not conclusively ruled out. The subluminous sample is mainly found in early-type galaxies with little or no star formation, so that the rate evolution is consistent with a galactic mass-dependent behavior: r(z) = A x M-g, with A = (1.1 +/- 0.3) x 10(-14) SNe yr(-1)M(circle dot)(-1).

引用

页数：18

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