2021MNRAS.508.3860G

Query : 2021MNRAS.508.3860G

2021MNRAS.508.3860G - Mon. Not. R. Astron. Soc., 508, 3860-3876 (2021/December-2)

Emission line galaxies in the SHARDS Frontier Fields - I. Candidate selection and the discovery of bursty Hα emitters.

GRIFFITHS A., CONSELICE C.J., FERREIRA L., CEVERINO D., ROSA-GONZALEZ D., HUERTAS-COMPANY M., ALCALDE PAMPLIEGA B., PEREZ-GONZALEZ P.G., DOMINGUEZ SANCHEZ H. and VEGA O.

Abstract (from CDS):

Emission line galaxies provide a crucial tool for the study of galaxy formation and evolution, providing a means to trace a galaxy's star formation history or metal enrichment, and to identify galaxies at a range of stellar masses. In this paper, we present a study of emission line galaxies in the Survey for High-z Absorption Red and Dead Sources (SHARDS) Frontier Fields (FF) medium-band survey. Through detailed flux calibrations we combine the first results of the SHARDS-FF survey with existing Hubble Frontier Field data to select 1098 candidate emission line galaxies from the Hubble Frontier Filed clusters Abell 370 and MACS J1149.5+2223. Furthermore, we implement this deep medium-band imaging to update photometric redshift estimates and stellar population parameters and discover 38 predominantly low-mass Hα emitters at redshifts 0.24 < z < 0.46. Overall, 27 of these sources have corresponding ultraviolet (UV) data from the Hubble Space Telescope that allow us to distinguish these sources and investigate the burstiness of their star formation histories. We find that more than 50 per cent of our sample shows an enhancement in Hα over UV, suggesting recent bursts in star formation on time-scales of a few to tens of Myr. We investigate these sources and find that they are typically low-mass discy galaxies with normal sizes. Their structures and star formation suggest that they are not undergoing mergers but are bursting due to alternative causes, such as gas accretion.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: clusters: general - dark ages, reionization, first stars - ultraviolet: galaxies

Simbad objects: 41

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Number of rows : 41
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [SLM2018] A370-clu 1796 EmG 02 39 46.3888 -01 35 18.636           ~ 1 0
2 [SLM2018] A370-clu 1706 EmG 02 39 49.0538 -01 35 21.765           ~ 1 0
3 [LRB2019] 5464 EmG 02 39 49.81 -01 35 11.3   25.965     22.855 ~ 3 0
4 [SLM2018] A370-clu 4476 EmG 02 39 49.9291 -01 34 02.823           ~ 1 0
5 [LRB2019] 6203 EmG 02 39 49.95 -01 35 01.3   27.343     24.632 ~ 3 0
6 [LRB2019] 11961 EmG 02 39 50.0801 -01 33 58.841   27.272     24.575 ~ 2 0
7 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 825 0
8 [LRB2019] 7055 EmG 02 39 51.60 -01 34 53.8   26.439     23.422 ~ 3 0
9 [LRB2019] 9884 EmG 02 39 52.2341 -01 34 24.243   25.971     22.818 ~ 4 0
10 [LRB2019] 7414 EmG 02 39 52.8338 -01 34 50.722   25.598     23.307 ~ 4 0
11 [SLM2018] A370-clu 5867 EmG 02 39 52.9826 -01 33 14.823           ~ 1 0
12 [LRB2019] 8850 EmG 02 39 53.09 -01 34 33.0   26.673     24.116 ~ 3 0
13 [LRB2019] 10554 EmG 02 39 53.11 -01 34 15.5   26.202     23.123 ~ 3 0
14 [LRB2019] 9736 EmG 02 39 53.45 -01 34 23.4   27.856     24.971 ~ 3 0
15 [SLM2018] A370-clu 6212 EmG 02 39 53.5066 -01 32 58.829           ~ 1 0
16 [LRB2019] 7363 EmG 02 39 53.58 -01 34 49.2   27.512     24.750 ~ 3 0
17 [SLM2018] A370-clu 2485 EmG 02 39 53.5879 -01 34 56.898           ~ 1 0
18 [LRB2019] 3402 EmG 02 39 53.7813 -01 35 40.219   24.531     23.693 ~ 4 0
19 [SLM2018] A370-clu 6497 EmG 02 39 54.2604 -01 32 45.704           ~ 1 0
20 [SLM2018] A370-clu 5615 EmG 02 39 54.6396 -01 33 24.176           ~ 1 0
21 [LRB2019] 11950 EmG 02 39 54.90 -01 34 00.0   27.123     24.285 ~ 3 0
22 [LRB2019] 12234 EmG 02 39 54.99 -01 33 55.6   26.608     26.077 ~ 3 0
23 [LRB2019] 11269 EmG 02 39 55.48 -01 34 08.3   26.295     23.179 ~ 3 0
24 [LRB2019] 5325 EmG 02 39 55.72 -01 35 14.5   25.462     24.463 ~ 3 0
25 [LRB2019] 9773 EmG 02 39 55.82 -01 34 23.4   25.066     23.921 ~ 3 0
26 [SLM2018] A370-clu 1060 EmG 02 39 56.2750 -01 35 45.096           ~ 1 0
27 [LRB2019] 8618 EmG 02 39 56.60 -01 34 36.0   27.505     24.547 ~ 3 0
28 [SLM2018] A370-clu 3328 EmG 02 39 56.7569 -01 34 34.908           ~ 1 0
29 [SLM2018] A370-clu 1612 EmG 02 39 57.5483 -01 35 25.141           ~ 1 0
30 [SLM2018] A370-clu 4033 EmG 02 39 58.5885 -01 34 15.804           ~ 1 0
31 [SLM2018] A370-par 492 EmG 02 40 10.0873 -01 38 50.510           ~ 1 0
32 [SLM2018] A370-par 466 EmG 02 40 13.4737 -01 39 01.574           ~ 1 0
33 [SLM2018] A370-par 443 EmG 02 40 14.3435 -01 38 56.274           ~ 1 0
34 [SLM2018] A370-par 3265 EmG 02 40 20.4933 -01 37 27.654           ~ 1 0
35 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
36 [MAT2017] MACS1149CLS 1024 EmG 11 49 34.2194 +22 24 44.377           ~ 2 0
37 CLASHVLT J114935.26+222505.2 EmG 11 49 35.260 +22 25 05.17         23.50 ~ 5 0
38 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 546 0
39 [MAT2017] MACS1149CLS 1383 EmG 11 49 38.7664 +22 24 18.829           ~ 2 0
40 [GKS2016] c271 EmG 11 49 39.0042 +22 22 57.091           ~ 3 0
41 [GKS2016] c293 EmG 11 49 40.366 +22 23 57.60           ~ 2 0

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