Unveiling the dominant gas heating mechanism in local LIRGs and ULIRGs

Details Unveiling the dominant gas heating mechanism in local LIRGs and ULIRGs Unveiling the dominant gas heating mechanism in local LIRGs and ULIRGs

2008-12-17

arxiv.org/abs/0812.3280v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, uses PoS.cls. To appear in Proceedings of Science, Proc. of the 9th European VLBI Network Symposium on the

Scientific paper

We show preliminary results from a sample of Luminous and Ultra-Luminous Infrared Galaxies (LIRGs and ULIRGs, respectively) in the local universe, obtained from observations using the Very Large Array (VLA), the Multi-Element Radio Link Interferometer Network (MERLIN), and the European VLBI Network (EVN). The main goal of our high-resolution, high-sensitivity radio observations is to unveil the dominant gas heating mechanism in the central regions of local (U)LIRGs. The main tracer of recent star-formation in (U)LIRGs is the explosion of core-collapse supernovae (CCSNe), which are the endproducts of the explosion of massive stars and yield bright radio events. Therefore, our observations will not only allow us to answer the question of the dominant heating mechanism in (U)LIRGs, but will yield also the CCSN rate and the star-formation rate (SFR) for the galaxies of the sample.

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