Decoding the IRX-β dust attenuation relation in star-forming galaxies at intermediate redshift

被引：4

作者：

Hamed, M. ^{[1
]}

Pistis, F. ^{[1
]}

Figueira, M. ^{[1
,4
]}

Malek, K. ^{[1
,2
]}

Nanni, A. ^{[1
,5
]}

Buat, V. ^{[2
]}

Pollo, A. ^{[1
,3
]}

Vergani, D. ^{[6
]}

Bolzonella, M. ^{[6
]}

Junais, J. ^{[1
]}

Krywult, J. ^{[7
]}

Takeuchi, T. ^{[8
]}

Riccio, G. ^{[1
]}

Moutard, T. ^{[2
]}

机构：

[1] Natl Ctr Nucl Res, Uul Pasteura 7, PL-02093 Warsaw, Poland

[2] Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France

[3] Jagiellonian Univ, Astron Observ, Ul Orla 171, PL-30244 Krakow, Poland

[4] UMK, Inst Astron, Fac Phys Astron & Informat, Ul Grudzidzka 5, PL-87100 Torun, Poland

[5] INAF Osservatorio Astron Abruzzo, Via Maggini Snc, I-64100 Teramo, Italy

[6] INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Piero Gobetti 93-3, I-40129 Bologna, Italy

[7] Jan Kochanowski Univ, Inst Phys, Ul Swietokrzyska 15, PL-25406 Kielce, Poland

[8] Nagoya Univ, Div Particle & Astrophys Sci, Furo Cho,Chikusa Ku, Nagoya, Aichi 4648602, Japan

来源：

ASTRONOMY & ASTROPHYSICS | 2023年 / 679卷

关键词：

galaxies: evolution; galaxies: ISM; galaxies: photometry; galaxies: star formation; ultraviolet: galaxies; infrared: galaxies; LYMAN-BREAK GALAXIES; STELLAR POPULATION SYNTHESIS; SURVEY VIPERS; PHOTOMETRIC REDSHIFTS; MASSIVE GALAXIES; LINE SPECTRA; SURVEY I; ULTRAVIOLET; HERSCHEL; EVOLUTION;

D O I：

10.1051/0004-6361/202346976

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. We aim to understand what drives the IRX-beta dust attenuation relation at intermediate redshifts (0.5 < z < 0.8) in star-forming galaxies. We investigate the role of various galaxy properties in shaping this observed relation.Methods. We used robust [O II]lambda 3727, [O III]lambda lambda 4959,5007, and H beta line detections of our statistical sample of 1049 galaxies to estimate the gas-phase metallicities. We derived key physical properties that are necessary to study galaxy evolution, such as the stellar masses and the star formation rates, using the spectral energy distribution fitting tool CIGALE. Equivalently, we studied the effect of galaxy morphology (mainly the Sersic index n and galaxy inclination) on the observed IRX-beta scatter. We also investigated the role of the environment in shaping dust attenuation in our sample.Results. We find a strong correlation with respect to the IRX-beta relation on the gas-phase metallicity in our sample, as well as a strong correlation with galaxy compactness characterized by the Sersic indexes. With higher metallicities, galaxies move along the track of the IRX-beta relation towards higher IRX. Correlations are also seen with the stellar masses, specific star formation rates, and the stellar ages of our sources. Metallicity is strongly correlated with the IRX-beta scatter, which also results from the presence of older stars and higher masses at higher beta values. Galaxies with higher metallicities show higher IRX and beta values. The correlation with specific dust mass strongly shifts the galaxies away from the IRX-beta relation towards lower beta values. We find that more compact galaxies go through a greater amount of attenuation than less compact galaxies. There is a subtle variation in the dust attenuation scatter between edge-on and face-on galaxies, but the difference is not statistically significant. Galaxy environments do not significantly affect dust attenuation in our sample of star-forming galaxies at intermediate redshift.

引用

页数：14

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