The Hubble Space Telescope Cluster Supernova Survey: VI. The Volumetric Type Ia Supernova Rate

Дата и время публикации : 2011-10-28T20:00:02Z

Авторы публикации и институты :
K. Barbary
G. Aldering
R. Amanullah
M. Brodwin
N. Connolly
K. S. Dawson
M. Doi
P. Eisenhardt
L. Faccioli
V. Fadeyev
H. K. Fakhouri
A. S. Fruchter
D. G. Gilbank
M. D. Gladders
G. Goldhaber
A. Goobar
T. Hattori
E. Hsiao
X. Huang
Y. Ihara
N. Kashikawa
B. Koester
K. Konishi
M. Kowalski
C. Lidman
L. Lubin
J. Meyers
T. Morokuma
T. Oda
N. Panagia
S. Perlmutter
M. Postman
P. Ripoche
P. Rosati
D. Rubin
D. J. Schlegel
A. L. Spadafora
S. A. Stanford
M. Strovink
N. Suzuki
N. Takanashi
K. Tokita
N. Yasuda
for the Supernova Cosmology Project

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 11 pages, 7 figures. Submitted to the Astrophysical Journal. Revised version following referee comments. See the HST Cluster SN Survey website at http://supernova.lbl.gov/2009ClusterSurvey for control time simulations in a machine-readable table and a complete listing of transient candidates from the survey
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO

Краткий обзор статьи: We present a measurement of the volumetric Type Ia supernova (SN Ia) rate out to z ~ 1.6 from the Hubble Space Telescope Cluster Supernova Survey. In observations spanning 189 orbits with the Advanced Camera for Surveys we discovered 29 SNe, of which approximately 20 are SNe Ia. Twelve of these SNe Ia are located in the foregrounds and backgrounds of the clusters targeted in the survey. Using these new data, we derive the volumetric SN Ia rate in four broad redshift bins, finding results consistent with previous measurements at z > 1 and strengthening the case for a SN Ia rate that is equal to or greater than ~0.6 x 10^-4/yr/Mpc^3 at z ~ 1 and flattening out at higher redshift. We provide SN candidates and efficiency calculations in a form that makes it easy to rebin and combine these results with other measurements for increased statistics. Finally, we compare the assumptions about host-galaxy dust extinction used in different high-redshift rate measurements, finding that different assumptions may induce significant systematic differences between measurements.

Category: Physics