DustKING - the story continues: dust attenuation in NGC 628
Marjorie Decleir,
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, 9000 Gent, Belgium, Marjorie.Decleir@UGent.be
Ilse De Looze,
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, 9000 Gent, Belgium and Dept. of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, UK
Médéric Boquien,
Univ. de Antofagasta, Centro de Astronomía, Avenida Angamos 601, Antofagasta 1270300, Chile
Maarten Baes,
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, 9000 Gent, Belgium
Abstract
Dust attenuation is a crucial but highly uncertain parameter that hampers the determination of intrinsic galaxy properties, such as stellar masses, star formation rates and star formation histories. The shape of the dust attenuation law is not expected to be uniform between galaxies, nor within a galaxy. Our DustKING project was introduced at the first BINA workshop in 2016 and aims to study the variations of dust attenuation curves in nearby galaxies. At the second BINA workshop in 2018, I presented the results of our pilot study for the spiral galaxy NGC 628. We find that the average attenuation law of this galaxy is characterised by a MW-like bump and a steep UV slope. Furthermore, we observe intriguing variations within the galaxy, with regions of high AV exhibiting a shallower attenuation curve. Finally, we discuss how our work might benefit from data taken with the UVIT from the Indian AstroSat mission.
Keywords : galaxies, ISM, individual, NGC 628, dust, extinction
Pour citer cet article
Marjorie Decleir, Ilse De Looze, Médéric Boquien & Maarten Baes, «DustKING - the story continues: dust attenuation in NGC 628», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 88 - Année 2019, Actes de colloques, 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium, 307 - 314 URL : https://popups.uliege.be/0037-9565/index.php?id=9015.
