Dust attenuation up to z ≃ 2 in the AKARI North Ecliptic Pole Deep Field

Aims. We aim to study the evolution of dust attenuation in galaxies selected in the infrared (IR) in the redshift range in which they are known to dominate the star formation activity in the universe. The comparison with other measurements of dust attenuation in samples selected using different crit...

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Published in:Astronomy and astrophysics (Berlin) 2015-05, Vol.577, p.A141
Main Authors: Buat, V., Oi, N., Heinis, S., Ciesla, L., Burgarella, D., Matsuhara, H., Malek, K., Goto, T., Malkan, M., Marchetti, L., Ohyama, Y., Pearson, C., Serjeant, S., Miyaji, T., Krumpe, M., Brunner, H.
Format: Article
Language:English
Subjects:
Active galactic nuclei
Asymptotic properties
Attenuation
Cosmic dust
Ecliptic
Galaxies
galaxies: evolution
galaxies: ISM
galaxies: photometry
infrared: galaxies
Luminosity
Red shift
surveys
ultraviolet: galaxies
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Summary:Aims. We aim to study the evolution of dust attenuation in galaxies selected in the infrared (IR) in the redshift range in which they are known to dominate the star formation activity in the universe. The comparison with other measurements of dust attenuation in samples selected using different criteria will give us a global picture of the attenuation at work in star-forming galaxies and its evolution with redshift. Methods. We selected galaxies in the mid-IR from the deep survey of the North Ecliptic Field performed by the AKARI satellite. Using multiple filters of IRC instrument, we selected more than 4000 galaxies from their rest-frame emission at 8 μm, from z ≃ 0.2 to ~2. We built spectral energy distributions from the rest-frame ultraviolet (UV) to the far-IR by adding ancillary data in the optical-near IR and from GALEX and Herschel surveys. We fit spectral energy distributions with the physically-motivated code CIGALE. We test different templates for active galactic nuclei (AGNs) and recipes for dust attenuation and estimate stellar masses, star formation rates, amount of dust attenuation, and AGN contribution to the total IR luminosity. We discuss the uncertainties affecting these estimates on a subsample of galaxies with spectroscopic redshifts. We also define a subsample of galaxies with an IR luminosity close to the characteristic IR luminosity at each redshift and study the evolution of dust attenuation of this selection representative of the bulk of the IR emission. Results. The AGN contribution to the total IR luminosity is found to be on average approximately 10%, with a slight increase with redshift. The determination of AGN contribution does not depend significantly on the assumed AGN templates except for galaxies detected in X-ray. The choice of attenuation law has a marginal impact on the determination of stellar masses and star formation rates. Dust attenuation in galaxies dominating the IR luminosity function is found to increase from z = 0 to z = 1 and to remain almost constant from z = 1 to z = 1.5. Conversely, when galaxies are selected at a fixed IR luminosity, their dust attenuation slightly decreases as redshift increases but with a large dispersion, confirming previous results obtained at lower redshift.The attenuation in our mid-IR selected sample is found ~2 mag higher than that found globally in the universe or in UV and Hα line selections in the same redshift range. This difference is well explained by an increase of dust at
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/201425399