Wiseman, P;
Smith, M;
Childress, M;
Kelsey, L;
Moller, A;
Gupta, RR;
Swann, E;
... Wilkinson, RD; + view all
(2020)
Supernova host galaxies in the dark energy survey: I. Deep coadds, photometry, and stellar masses.
Monthly Notices of the Royal Astronomical Society
, 495
(4)
pp. 4040-4060.
10.1093/mnras/staa1302.
Preview |
Text
staa1302.pdf - Published Version Download (6MB) | Preview |
Abstract
The 5-yr Dark Energy Survey Supernova Programme (DES-SN) is one of the largest and deepest transient surveys to date in terms of volume and number of supernovae. Identifying and characterizing the host galaxies of transients plays a key role in their classification, the study of their formation mechanisms, and the cosmological analyses. To derive accurate host galaxy properties, we create depth-optimized coadds using single-epoch DES-SN images that are selected based on sky and atmospheric conditions. For each of the five DES-SN seasons, a separate coadd is made from the other four seasons such that each SN has a corresponding deep coadd with no contaminating SN emission. The coadds reach limiting magnitudes of order ∼27 in g band, and have a much smaller magnitude uncertainty than the previous DES-SN host templates, particularly for faint objects. We present the resulting multiband photometry of host galaxies for samples of spectroscopically confirmed type Ia (SNe Ia), core-collapse (CCSNe), and superluminous (SLSNe) as well as rapidly evolving transients (RETs) discovered by DES-SN. We derive host galaxy stellar masses and probabilistically compare stellar-mass distributions to samples from other surveys. We find that the DES spectroscopically confirmed sample of SNe Ia selects preferentially fewer high-mass hosts at high-redshift compared to other surveys, while at low redshift the distributions are consistent. DES CCSNe and SLSNe hosts are similar to other samples, while RET hosts are unlike the hosts of any other transients, although these differences have not been disentangled from selection effects.
| Type: | Article |
|---|---|
| Title: | Supernova host galaxies in the dark energy survey: I. Deep coadds, photometry, and stellar masses |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/staa1302 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/staa1302 |
| 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: | techniques: image processing, catalogues, supernovae: general |
| 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/10106571 |
Archive Staff Only
 |
View Item |
