Issue |
A&A
Volume 405, Number 3, July III 2003
|
|
---|---|---|
Page(s) | 859 - 866 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20030648 | |
Published online | 30 June 2003 |
Massive galaxy clusters as gravitational telescopes for distant supernovae
Department of Physics, Stockholm University, AlbaNova, 106 91 Stockholm, Sweden
Corresponding author: C. Gunnarsson, cg@physto.se
Received:
21
November
2002
Accepted:
24
April
2003
We investigate the potential of using massive clusters as
gravitational telescopes for searches and studies of supernovae of
Type Ia and Type II
in optical and near-infrared bands at central wavelengths in the interval
0.8–1.25 μm.
Using high-redshift supernova rates derived from the measured star
formation rate,
we find the most interesting effects for the detection of
core-collapse SNe in
searches at limiting magnitudes mag, where
the total detection rate could be significantly enhanced and the
number of detectable events is
considerable even in a small field. For shallower searches, ~24 mag,
a net gain factor of up to 3 in the discovery rate could be obtained, and yet
a much larger factor for very high source redshifts. For programs
such as the GOODS/ACS transient survey, the discovery rate of supernovae
beyond
could be significantly increased if the observations were done
in the direction of massive clusters.
For extremely deep observations,
mag, or for very
bright SNe (e.g. Type Ia) the
competing effect of field reduction by lensing dominates, and fewer supernovae
are likely to be discovered behind foreground clusters.
Key words: cosmology: gravitational lensing / cosmology: distance scale / galaxies: clusters: general / stars: supernovae: general
© ESO, 2003
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