JINGLE - V. Dust properties of nearby galaxies derived from hierarchical Bayesian SED fitting
| Autor: | Gioacchino Accurso, Jong Chul Lee, Ting Xiao, Lihwai Lin, Isabella Lamperti, Ho Seong Hwang, Michał J. Michałowski, Matthew Smith, Amélie Saintonge, Elias Brinks, Toby Brown, Ilse De Looze, Christine D. Wilson, Thomas G. Williams, David L. Clements, Christopher J. R. Clark, David Henry william Glass, C. Yang, Martin Bureau, Mark Sargent, Stephen Anthony Eales |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Stellar mass
INFRARED-EMISSION Extinction (astronomy) FOS: Physical sciences F500 Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astronomy & Astrophysics 01 natural sciences 0103 physical sciences 0201 Astronomical and Space Sciences Emissivity Astrophysics::Solar and Stellar Astrophysics Black-body radiation ISM [submillimetre] COLD DUST MAIN-SEQUENCE 010303 astronomy & astrophysics evolution [galaxies] Astrophysics::Galaxy Astrophysics QB Cosmic dust Physics Science & Technology ISM [galaxies] extinction 010308 nuclear & particles physics Star formation JCMT LEGACY SURVEY Astronomy and Astrophysics HERSCHEL-ATLAS Astrophysics - Astrophysics of Galaxies Galaxy submillimetre: ISM MODEL SPECTRAL ENERGY-DISTRIBUTION Physics and Astronomy TEMPERATURE-DEPENDENCE Space and Planetary Science GAS Astrophysics of Galaxies (astro-ph.GA) Physical Sciences Spectral energy distribution dust Astrophysics::Earth and Planetary Astrophysics dust extinction galaxies: evolution galaxies: ISM INTERSTELLAR DUST |
| Zdroj: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
| ISSN: | 0035-8711 1365-2966 |
| Popis: | We study the dust properties of 192 nearby galaxies from the JINGLE survey using photometric data in the 22-850micron range. We derive the total dust mass, temperature T and emissivity index beta of the galaxies through the fitting of their spectral energy distribution (SED) using a single modified black-body model (SMBB). We apply a hierarchical Bayesian approach that reduces the known degeneracy between T and beta. Applying the hierarchical approach, the strength of the T-beta anti-correlation is reduced from a Pearson correlation coefficient R=-0.79 to R=-0.52. For the JINGLE galaxies we measure dust temperatures in the range 17-30 K and dust emissivity indices beta in the range 0.6-2.2. We compare the SMBB model with the broken emissivity modified black-body (BMBB) and the two modified black-bodies (TMBB) models. The results derived with the SMBB and TMBB are in good agreement, thus applying the SMBB, which comes with fewer free parameters, does not penalize the measurement of the cold dust properties in the JINGLE sample. We investigate the relation between T and beta and other global galaxy properties in the JINGLE and Herschel Reference Survey (HRS) sample. We find that beta correlates with the stellar mass surface density (R=0.62) and anti-correlates with the HI mass fraction (M(HI)/M*, R=-0.65), whereas the dust temperature correlates strongly with the SFR normalized by the dust mass (R=0.73). These relations can be used to estimate T and beta in galaxies with insufficient photometric data available to measure them directly through SED fitting. MNRAS in press, 31 pages |
| Databáze: | OpenAIRE |
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