Tanoglidis, D;
Drlica-Wagner, A;
Wei, K;
Li, TS;
Sanchez, J;
Zhang, Y;
Peter, AHG;
... Walker, AR; + view all
(2021)
Shadows in the Dark: Low-surface-brightness Galaxies Discovered in the Dark Energy Survey.
The Astrophysical Journal Supplement Series
, 252
(2)
, Article 18. 10.3847/1538-4365/abca89.
Preview |
Text
Tanoglidis_2021_ApJS_252_18.pdf - Published Version Download (9MB) | Preview |
Abstract
We present a catalog of 23,790 extended low-surface-brightness galaxies (LSBGs) identified in $\sim 5000\,{\deg }^{2}$ from the first three years of imaging data from the Dark Energy Survey (DES). Based on a single-component Sérsic model fit, we define extended LSBGs as galaxies with g-band effective radii ${R}_{\mathrm{eff}}(g)\gt 2\buildrel{\prime\prime}\over{.} 5$ and mean surface brightness ${\bar{\mu }}_{\mathrm{eff}}(g)\gt 24.2\,\mathrm{mag}\,{\mathrm{arcsec}}^{-2}$. We find that the distribution of LSBGs is strongly bimodal in (g − r) versus (g − i) color space. We divide our sample into red (g − i ≥ 0.60) and blue (g − i < 0.60) galaxies and study the properties of the two populations. Redder LSBGs are more clustered than their blue counterparts and are correlated with the distribution of nearby (z < 0.10) bright galaxies. Red LSBGs constitute ~33% of our LSBG sample, and $\sim 30 \% $ of these are located within 1° of low-redshift galaxy groups and clusters (compared to ~8% of the blue LSBGs). For nine of the most prominent galaxy groups and clusters, we calculate the physical properties of associated LSBGs assuming a redshift derived from the host system. In these systems, we identify 41 objects that can be classified as ultradiffuse galaxies, defined as LSBGs with projected physical effective radii ${R}_{\mathrm{eff}}\gt 1.5\,\mathrm{kpc}$ and central surface brightness ${\mu }_{0}(g)\gt 24.0\,\mathrm{mag}\,{\mathrm{arcsec}}^{-2}$. The wide-area sample of LSBGs in DES can be used to test the role of environment on models of LSBG formation and evolution.
| Type: | Article |
|---|---|
| Title: | Shadows in the Dark: Low-surface-brightness Galaxies Discovered in the Dark Energy Survey |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-4365/abca89 |
| Publisher version: | https://doi.org/10.3847/1538-4365/abca89 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, DIGITAL SKY SURVEY, ULTRA-DIFFUSE GALAXIES, MATTER HALOES, COMA CLUSTER, LUMINOSITY, COLOR, POPULATION, DEPENDENCE, EVOLUTION, CATALOG |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10123090 |
Archive Staff Only
 |
View Item |
