Issue |
A&A
Volume 433, Number 3, April III 2005
|
|
---|---|---|
Page(s) | 807 - 814 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20041411 | |
Published online | 29 March 2005 |
The supernova rate per unit mass
1
CNR – IRA, Largo E. Fermi 5, 50125 Firenze, Italy e-mail: filippo@arcetri.astro.it
2
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
3
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
4
INAF, Osservatorio Astronomico di Capodimonte, salita Moiariello a Capodimonte 16, 80131 Napoli, Italy
5
Dipartimento di Astronomia, Universitá di Firenze, Largo E. Fermi 5, 50125, Firenze, Italy
6
Byurakan Astrophysical Observatory and Isaac Newton Institute of Chile, Armenian Branch, Byurakan 378433, Armenia
7
INAF, Osservatorio Astronomico di Padova, vicolo dell'Osservatorio 5, 35122 Padova, Italy
Received:
4
June
2004
Accepted:
17
November
2004
We compute the rate of supernovae (SNe) of different types
along the Hubble sequence normalized to the near-infrared luminosity
and to the stellar mass of the parent galaxies. This is made possible
by the new complete catalog of near-infrared galaxy magnitudes
obtained by 2MASS. We find that the rates of all SN types, including
Ia, Ib/c and II, show a sharp dependence on both the morphology and
the () colors of the parent galaxies and, therefore, on the
star formation activity. In particular we find, with a high
statistical significance, that the type Ia rate in late type galaxies
is a factor ~20 higher than in E/S0. Similarly, the type Ia rate
in the galaxies bluer than
is about a factor of 30 larger
than in galaxies with
. These findings can be explained by
assuming that a significant fraction of Ia events in late
spirals/irregulars originates in a relatively young stellar component.
Key words: stars: supernovae: general / infrared: galaxies
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.