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Dust attenuation on and off the galaxy Main Sequence at z⩾1

Published online by Cambridge University Press:  10 June 2020

Annagrazia Puglisi
Affiliation:
Laboratoire AIM-Paris-Saclay, CEA/DSM-CNRS-Université Paris Diderot, Irfu/Service d’Astrophysique CEA Saclay, Orme des Merisiers, 91191 Gif sur Yvette, France email: annagrazia.puglisi@cea.frl
Corresponding

Abstract

Stellar masses are crucial ingredients for putting galaxies in the context of galaxy evolution and are commonly evaluated via Spectral Energy Distribution (SED)-fitting analyses which are hampered by dust attenuation. Observational constraints of attenuation in various galaxy classes provide key inputs for fitting a SED. I will present recent results about the attenuation properties of a sample of Herschel-selected galaxies at 0.7 ⩽ z ⩽ 1.6 widely spanning the star-forming Main Sequence (MS). I will show that far-IR selected galaxies on the MS are well described with local attenuation recipes. Conversely, common recipes cannot recover the SFR of far-IR selected starburst galaxies well above the MS. The SFR of these outliers appears to be hidden by the ∼90% in optically thick cores. These findings pose challenges for SED-fitting codes based on energy balance assumptions that might break in these peculiar sources.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

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Dust attenuation on and off the galaxy Main Sequence at z⩾1
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