Bell, CPM, Cioni, M-RL, Wright, AH, Rubele, S, Nidever, DL, Tatton, BL, van Loon, JT, Zaritsky, D, Choi, Y, Choudhury, S, Clementini, G, de Grijs, R, Ivanov, VD, Majewski, SR, Marconi, M, Martínez-Delgado, D, Massana, P, Muñoz, RR, Niederhofer, F, Noël, NED, Oliveira, JM, Olsen, K, Pennock, CM, Ripepi, V, Subramanian, S and Vivas, AK (2020) The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – II. The Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 499 (1). 993 -1004. ISSN 0035-8711

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We present a map of the total intrinsic reddening across ≃ 34 deg2 of the Small Magellanic Cloud (SMC) derived using optical (ugriz) and near-infrared (IR; YJKs) spectral energy distributions (SEDs) of background galaxies. The reddening map is created using a subsample of 29,274 galaxies with low levels of intrinsic reddening based on the lephare χ2 minimisation SED-fitting routine. We find statistically significant enhanced levels of reddening associated with the main body of the SMC compared with regions in the outskirts [ΔE(B − V) ≃ 0.3 mag]. A comparison with literature reddening maps of the SMC shows that, after correcting for differences in the volume of the SMC sampled, there is good agreement between our results and maps created using young stars. In contrast, we find significant discrepancies between our results and maps created using old stars or based on longer wavelength far-IR dust emission that could stem from biased samples in the former and uncertainties in the far-IR emissivity and the optical properties of the dust grains in the latter. This study represents one of the first large-scale categorisations of extragalactic sources behind the SMC and as such we provide the lephare outputs for our full sample of ∼ 500,000 sources.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2020 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: surveys – dust, extinction – galaxies: ISM – Magellanic Clouds – galaxies: photometry.
Subjects: Q Science > QB Astronomy > QB799 Stars
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 19 Oct 2020 17:53
Last Modified: 16 Mar 2021 12:27

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