Astronomy and Astrophysics, volume 401, 519-530 (2003/4-2)
The infrared supernova rate in starburst galaxies.
MANNUCCI F., MAIOLINO R., CRESCI G., DELLA VALLE M., VANZI L., GHINASSI F., IVANOV V.D., NAGAR N.M. and ALONSO-HERRERO A.
Abstract (from CDS):
We report the results of our ongoing search for extincted supernovae (SNe) at near-infrared wavelengths. We have monitored at 2.2µm a sample of 46 Luminous Infrared Galaxies and detected 4 SNe. The number of detections is still small but sufficient to provide the first estimate of supernova rate at near-infrared wavelengths. We measure a SN rate of SNNIRr=7.6±3.8 SNu which is an order of magnitude larger than observed in quiescent galaxies. On the other hand, the observed near-infrared rate is still a factor 3-10 smaller than that estimated from the far-infrared luminosity of the galaxies. Among various possibilities, the most likely scenario is that dust extinction is so high (AV>30) to obscure most SNe even in the near-IR. The role of type Ia SNe is also discussed within this context. We derive the type Ia SN rate as a function of the stellar mass of the galaxy and find a sharp increase toward galaxies with higher activity of star formation. This suggests that a significant fraction of type Ia SNe are associated with young stellar populations. Finally, as a by-product, we give the average K-band light curve of core-collapse SNe based on all the existing data, and review the relation between SN rate and far-infrared luminosity.
supernovae: general - supernovae: individual: SN 1999gd - supernovae: individual: SN 2000bg - infrared: stars