The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – II. The Small Magellanic Cloud
Abstract
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 minimization 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 categorizations of extragalactic sources behind the SMC and as such we provide the lephare outputs for our full sample of ∼500 000 sources.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 21, 2020
- Source ID
- 10.1093/mnras/staa2786
Entities
People
- Angus H. Wright
- Ben L Tatton
- Cameron P. M. Bell
- Clara M Pennock
- David Martínez-Delgado
- David Nidever
- Dennis Zaritsky
- Florian Niederhofer
- Gisella Clementini
- J. M. Oliveira
- Jacobus van Loon
- Kathy Vivas
- Knut Olsen
- Marcella Marconi
- Maria-Rosa L. Cioni
- N. E. D. Noël
- Pol Massana
- Ricardo R. Muñoz
- Richard de Grijs
- S. Subramanian
- Samyaday Choudhury
- Stefano Rubele
- Steven Majewski
- V. Ripepi
- Valentin Ivanov
- Yumi Choi
Organizations
- Cerro Tololo Inter-American Observatory
- European Commission
- European Regional Development Fund
- European Research Council
- European Southern Observatory
- Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica
- Indian Institute of Astrophysics
- International Space Science Institute
- Leibniz Institute for Astrophysics Potsdam
- Macquarie University
- Montana State University
- National Institute for Astrophysics
- National Optical Astronomy Observatory
- National Science Foundation
- Ruhr University Bochum
- Science and Engineering Research Board
- Science and Technology Facilities Council
- Space Telescope Science Institute
- Spanish National Research Council
- University of Arizona
- University of Keele
- University of Padua
- University of Surrey
- University of Virginia