The impact of kinematics on the star formation process of galaxies
Abstract
The Herschel Reference Survey (HRS) is a complete K-band-selected, volume-limited sample of 323 nearby galaxies spanning a wide range in morphological type and stellar mass. We are gathering and analyzing high-resolution 2D Fabry-Perot spectroscopic Hα data for 261 star forming objects of the HRS in order to provide a complementary kinematical information to the sample. We have been actively participating in a long-term observing campaign started in December 2015 using two different instruments: GHASP at the OHP 1.93m telescope, and PUMA at the SPM 2.1m telescope. Combined with multifrequency data spanning the whole electromagnetic spectrum (from UV GALEX to FIR Herschel, including HI and CO), and multizone chemo-spectrophotometric models of galaxy evolution as well as with the CIGALE SED fitting code, the Fabry-Perot data will be used to study the role played by velocity rotation and turbulence down to kpc scales in the process of star formation occurring in normal late-type galaxies. This will be done by comparing the radial variations of the star formation activity of galaxies, corrected for dust attenuation, and modulated by the variation of the rotational velocity, to the gas surface density of the galaxies. The multifrequency dataset in hour hands allow us to determine in a self consistent way, and with unprecedented precision, the 2D-distribution of the different galaxy components (atomic, molecular, dust masses), the dust attenuation, the typical age and metallicity of the different stellar populations and several other properties critical for the study of the radial variation of the star formation history of these galaxies.
- Publication:
-
SF2A-2018: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics
- Pub Date:
- December 2018
- Bibcode:
- 2018sf2a.conf..363G
- Keywords:
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- Galaxies: spiral;
- irregular;
- dwarf;
- star forming;
- Galaxies: kinematics anddynamics;
- HRS: Herschel Reference Survey