The AGN contribution to the UV-FIR luminosities of interacting galaxies and its role in identifying the Main Sequence
| Autor: | Juan Rafael Martínez-Galarza, Andrés F. Ramos Padilla, Matthew L. N. Ashby, Aaron S Weiner, Aliza G. Beverage, Mario-A. Higuera-G., Howard A. Smith, Jeremy Dietrich |
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| Přispěvatelé: | Astronomy |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
ACTIVE GALACTIC NUCLEI
Active galactic nucleus SPECTRAL IRRADIANCE CALIBRATION Stellar mass Infrared Astrophysics::High Energy Astrophysical Phenomena Techniques: spectroscopic FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Luminosity 0103 physical sciences STAR-FORMING GALAXIES Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Physics 010308 nuclear & particles physics Star formation ENERGY-DISTRIBUTION Galaxies: evolution Astronomy and Astrophysics Galaxies: active Astrophysics - Astrophysics of Galaxies Galaxy Galaxies: interactions Interstellar medium Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) MULTIBAND IMAGING PHOTOMETER Spectral energy distribution DIGITAL SKY SURVEY INFRARED LUMINOSITY Galaxies: starburst ABSOLUTE CALIBRATION Techniques: photometric HIGH-RESOLUTION SPECTROSCOPY MIDINFRARED PROPERTIES |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 499(3), 4325-4369. Oxford University Press |
| ISSN: | 0035-8711 |
| Popis: | Emission from active galactic nuclei (AGNs) is known to play an important role in the evolution of many galaxies including luminous and ultraluminous systems (U/LIRGs), as well as merging systems. However, the extent, duration, and exact effects of its influence are still imperfectly understood. To assess the impact of AGNs on interacting systems, we present a Spectral Energy Distribution (SED) analysis of a sample of 189 nearby galaxies. We gather and systematically re-reduce archival broad-band imaging mosaics from the ultraviolet to the far-infrared using data from GALEX, SDSS, 2MASS, IRAS, WISE, Spitzer and Herschel. We use spectroscopy from Spitzer/IRS to obtain fluxes from fine-structure lines that trace star formation and AGN activity. Utilizing the SED modelling and fitting tool CIGALE, we derive the physical conditions of the ISM, both in star-forming regions and in nuclear regions dominated by the AGN in these galaxies. We investigate how the star formation rates (SFRs) and the fractional AGN contributions ($f_{\rm{AGN}}$) depend on stellar mass, galaxy type, and merger stage. We find that luminous galaxies more massive than about $10^{10} \rm{M}_{*}$ are likely to deviate significantly from the conventional galaxy main-sequence relation. Interestingly, infrared AGN luminosity and stellar mass in this set of objects are much tighter than SFR and stellar mass. We find that buried AGNs may occupy a locus between bright starbursts and pure AGNs in the $f_{\rm{AGN}}$-[Ne V]/[Ne II] plane. We identify a modest correlation between $f_{\rm{AGN}}$ and mergers in their later stages. Accepted for publication in MNRAS; 24 pages, 15 figures, 3 tables (plus appendix) |
| Databáze: | OpenAIRE |
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