Understanding the clumpy star-formation in local (U)LIRGs: A near-IR IFS perspective
Abstract
The importance of Luminous and Ultraluminous Infrared Galaxies (U/LIRGs) in the context of the cosmological evolution of the star formation has been well established in the last decades. In particular, the study of local U/LIRGs using near-IR integral field spectroscopic techniques allows us to disentangle the 2D distribution of the star-formation using high spatial resolution, and characterise dust-enshrouded, spatially-resolved star-forming regions with great amount of detail. We present a comprehensive 2D IFS near-IR study of the extinction-corrected star-formation in a local sample of 10 LIRGs and 7 ULIRGs, based on VLT-SINFONI observations. We investigate the spatially-resolved distribution of the extinction-corrected star-formation rate (SFR) and star-formation rate surface density (Σ_{SFR}) by analysing the Brγ and Paα emission of the galaxies of the sample. We also obtained integrated measurements of the SFR and Σ_{SFR}, and identified a sample of 95 individual star-forming regions, characterised in terms of their size and Paα luminosity. These measurements will be discussed and compared with other SFR tracers like Hα, 24μm, and L_{IR}, and other local and high-z samples of star-forming clumps.
- Publication:
-
Highlights on Spanish Astrophysics IX
- Pub Date:
- March 2017
- Bibcode:
- 2017hsa9.conf..205P