Small Magellanic Cloud's background galaxies

We present a map of the total intrinsic reddening across ~34deg^2^ of the Small Magellanic Cloud (SMC) derived using optical (ugriz) and near-infrared (IR; YJK_s_) spectral energy distributions (SEDs) of background galaxies. The reddening map is created using a subsample of 29274 galaxies with low levels of intrinsic reddening based on the LEPHARE {chi}^2^ 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 [{Delta}E(B-V)~0.3mag]. 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 ~500000 sources.

Cone search capability for table J/MNRAS/499/993/table1 (A the lephare output for the 497577 sources in the full SMC sample)

Cone search capability for table J/MNRAS/499/993/table3 (Comparison between the spectroscopically determined and calculated photometric redshifts for QSOs behind the SMC)

Cone search capability for table J/MNRAS/499/993/table4 (Median reddening values, standard deviations and the number of galaxies in each of the 343 bins covering the combined SMASH-VMC footprint of the SMC)

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Creator Bell C.P.M.; Cioni M.-R.L.; Wright A.H.; Rubele S.; Nidever D.L.,Tatton B.L.; van Loon J.T.; Zaritsky D.; Choi Y.; Choudhury S.,Clementini G.; de Grijs R.; Ivanov V.D.; Majewski S.R.; Marconi M.,Martinez-Delgado D.; Massana P.; Munoz R.R.; Niederhofer F.; Noel N.E.D.,Oliveira J.M.; Olsen K.; Pennock C.M.; Ripepi V.; Subramanian S.,Vivas A.K.
Publisher CDS
Publication Year 2023
OpenAccess true
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Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics