Dust Attenuation Curve for Local Subgalactic Star-forming Regions

Berzaf B. Teklu; Zesen Lin; Xu Kong; Enci Wang; Yulong Gao; Qing Liu; Ning Hu; Haiyang Liu

doi:10.3847/1538-4357/ab7f27

paper

Dust Attenuation Curve for Local Subgalactic Star-forming Regions

arXiv:2003.04814 · doi:10.3847/1538-4357/ab7f27

Abstract

We compile a sample of about 157,000 spaxels from the Mapping Nearby Galaxies at the Apache Point Observatory survey to derive the average dust attenuation curve for subgalactic star-forming regions of local star-forming galaxies (SFGs) in the optical wavelength, following the method of \cite{Calzetti1994}. We obtain a $D_{n} (4000)$ -independent average attenuation curve for spaxels with $1.1 \leq D_{n} (4000) < 1.3$ , which is similar to the one derived from either local starbursts or normal SFGs. We examine whether and how the shape of the average attenuation curve changes with several local and global physical properties. For spaxels with $1.2 \leq D_{n} (4000) < 1.3$ , we find no dependence on either local or global physical properties for the shape of the average attenuation curve. However, for spaxels with younger stellar population ( $1.1 \leq D_{n} (4000) < 1.2$ ), shallower average attenuation curves are found for star-forming regions with smaller stellar mass surface density, smaller star formation rate surface density, or those residing in the outer region of galaxies. These results emphasize the risk of using one single attenuation curve to correct the dust reddening for all types of star-forming regions, especially for those with fairly young stellar population.

arXiv commentAccepted for publication in ApJ

Dust Attenuation Curve for Local Subgalactic Star-forming Regions

Abstract

References in corpus (46)

Cited by in corpus (4)