Stellar Population Synthesis of star forming clumps in galaxy pairs and non-interacting spiral galaxies
| Autor: | Artemi Camps-Fariña, John E. Beckman, Margarita Rosado, Joan Font, Isaiah S. Cox, Javier Zaragoza-Cardiel, Beverly J. Smith, Theodoros Bitsakis |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Spiral galaxy Stellar mass Stellar population 010308 nuclear & particles physics Star formation Infrared FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Star (graph theory) 01 natural sciences Astrophysics - Astrophysics of Galaxies Galaxy Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Spectral energy distribution Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| DOI: | 10.48550/arxiv.1712.05408 |
| Popis: | We have identified 1027 star forming complexes in a sample of 46 galaxies from the Spirals, Bridges, and Tails (SB&T) sample of interacting galaxies, and 693 star forming complexes in a sample of 38 non-interacting spiral (NIS) galaxies in $8\rm{��m}$ observations from the Spitzer Infrared Array Camera. We have used archival multi-wavelength UV-to IR observations to fit the observed spectral energy distribution (SED) of our clumps with the Code Investigating GALaxy Emission (CIGALE) using a double exponentially declined star formation history (SFH). We derive SFRs, stellar masses, ages and fractions of the most recent burst, dust attenuation, and fractional emission due to an AGN for these clumps. The resolved star formation main sequence holds on 2.5kpc scales, although it does not hold on 1kpc scales. We analyzed the relation between SFR, stellar mass, and age of the recent burst in the SB&T and NIS samples, and we found that the SFR per stellar mass is higher in the SB&T galaxies, and the clumps are younger in the galaxy pairs. We analyzed the SFR radial profile and found that SFR is enhanced through the disk and in the tidal features relative to normal spirals. Accepted for publication in ApJS. 20 pages, 10 figures, 6 tables |
| Databáze: | OpenAIRE |
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