2023ApJ...951..138L

Query : 2023ApJ...951..138L

2023ApJ...951..138L - Astrophys. J., 951, 138 (2023/July-2)

Low-metallicity Galaxies from the Dark Energy Survey.

LIN Y.-H., SCARLATA C., MEHTA V., SKILLMAN E., HAYES M., McQUINN K.B.W., FORTSON L., CHWOROWSKY K. and CLARKE L.

Abstract (from CDS):

We present a new selection of 358 blue compact dwarf galaxies (BCDs) from 5000 square degrees in the Dark Energy Survey, and the spectroscopic follow-up of a subsample of 68 objects. For the subsample of 34 objects with deep spectra, we measure the metallicity via the direct Te method using the auroral [O III]λ 4363 emission line. These BCDs have an average oxygen abundance of 12+log(O/H) = 7.8, with stellar masses between 107 and 108M⊙ and specific star-formation rates between ∼10–9 and 10–7 yr–1. We compare the position of our BCDs with the mass-metallicity (M-Z) and luminosity-metallicity (L-Z) relation derived from the Local Volume Legacy sample. We find the scatter about the M-Z relation is smaller than the scatter about the L-Z relation. We identify a correlation between the offsets from the M-Z and L-Z relation that we suggest is due to the contribution of metal-poor inflows. Finally, we explore the validity of the mass-metallicity-SFR fundamental plane in the mass range probed by our galaxies. We find that BCDs with stellar masses smaller than 108M⊙ do not follow the extrapolation of the fundamental plane. This result suggests that mechanisms other than the balance between inflows and outflows may be at play in regulating the position of low-mass galaxies in the M-Z-SFR space.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galaxy chemical evolution - Dwarf galaxies - Compact dwarf galaxies - Scaling relations - Galaxy properties - Metallicity

Simbad objects: 65

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Number of rows : 65
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 DES J000652.47-591113.0 bCG 00 06 52.472640 -59 11 13.00560           ~ 1 0
2 DES J001915.17-593716.4 bCG 00 19 15.171120 -59 37 16.40640           ~ 1 0
3 DES J020603.93-612541.4 bCG 02 06 03.935760 -61 25 41.46960           ~ 1 0
4 DES J021258.59-323104.4 bCG 02 12 58.593120 -32 31 04.48320           ~ 1 0
5 DES J021703.13-143610.0 bCG 02 17 03.132960 -14 36 10.06200           ~ 1 0
6 DES J021805.51-194607.8 bCG 02 18 05.510400 -19 46 07.84920           ~ 1 0
7 SDSS J021852.90-091218.7 bCG 02 18 52.9115851920 -09 12 18.816216012           ~ 13 0
8 DES J021900.89-641311.7 bCG 02 19 00.896880 -64 13 11.75520           ~ 1 0
9 DES J021911.12-571404.0 bCG 02 19 11.123040 -57 14 04.08480           ~ 1 0
10 DES J023939.33-165102.0 bCG 02 39 39.339840 -16 51 02.00520           ~ 1 0
11 DES J024201.52-514937.0 bCG 02 42 01.529520 -51 49 37.08480           ~ 1 0
12 DES J024855.90-204603.5 bCG 02 48 55.902960 -20 46 03.55440           ~ 1 0
13 [VV2003c] J024939.7-011150 Sy1 02 49 39.7392929448 -01 11 51.322950600   18.76       ~ 6 0
14 DES J030250.27-113615.9 bCG 03 02 50.276880 -11 36 15.90480           ~ 1 0
15 CPD-69 177 WD* 03 10 31.0195960176 -68 36 03.380768388 10.757 11.413 11.394 11.47 11.558 DA3.0 299 0
16 DES J031144.14-134136.3 bCG 03 11 44.149200 -13 41 36.35880           ~ 1 0
17 DES J032244.43-353955.9 bCG 03 22 44.436720 -35 39 55.97640           ~ 1 0
18 DES J034231.45-381616.7 bCG 03 42 31.456800 -38 16 16.75200           ~ 1 0
19 DES J034844.47-563636.8 bCG 03 48 44.470320 -56 36 36.85680           ~ 1 0
20 DES J035629.65-365126.6 bCG 03 56 29.655840 -36 51 26.63280           ~ 1 0
21 DES J040123.86-450610.6 bCG 04 01 23.863200 -45 06 10.67760           ~ 1 0
22 DES J042312.33-420552.4 bCG 04 23 12.338160 -42 05 52.40400           ~ 1 0
23 DES J042603.92-541050.0 bCG 04 26 03.928320 -54 10 50.03040           ~ 1 0
24 DES J044646.70-485442.5 bCG 04 46 46.708560 -48 54 42.50160           ~ 1 0
25 DES J045038.39-542927.3 bCG 04 50 38.399280 -54 29 27.38400           ~ 1 0
26 DES J045236.57-441128.0 bCG 04 52 36.571200 -44 11 28.05000           ~ 1 0
27 DES J045345.51-321938.5 bCG 04 53 45.513360 -32 19 38.58240           ~ 1 0
28 DES J050018.70-274352.1 bCG 05 00 18.700080 -27 43 52.19040           ~ 1 0
29 DES J050024.59-320411.0 bCG 05 00 24.596640 -32 04 11.06040           ~ 1 0
30 DES J052004.06-511137.7 bCG 05 20 04.064400 -51 11 37.79880           ~ 1 0
31 DES J052035.90-194601.9 bCG 05 20 35.903280 -19 46 01.90200           ~ 1 0
32 DES J052237.37-225131.8 bCG 05 22 37.370400 -22 51 31.82400           ~ 1 0
33 DES J052424.15-204119.0 bCG 05 24 24.155280 -20 41 19.05360           ~ 1 0
34 DES J052705.68-270406.7 bCG 05 27 05.684160 -27 04 06.74400           ~ 1 0
35 DES J052833.39-435147.3 bCG 05 28 33.395040 -43 51 47.36160           ~ 1 0
36 DES J054132.48-605953.7 bCG 05 41 32.487360 -60 59 53.79000           ~ 1 0
37 DES J054620.38-354459.3 bCG 05 46 20.389920 -35 44 59.32680           ~ 1 0
38 DES J061752.65-495450.8 bCG 06 17 52.657680 -49 54 50.88240           ~ 1 0
39 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
40 NAME Leo P BiC 10 21 45.123 +18 05 16.89           ~ 268 0
41 CD-34 6792 PM* 10 32 13.6185546336 -35 37 41.711776068   12.84 11.84     F:wl: 158 0
42 WG 22 WD* 12 38 49.7811220835 -49 48 00.219515411   14.14 13.96     DA4.2 245 0
43 SDSS J124753.79-111209.1 bCG 12 47 53.79930 -11 12 09.1821           ~ 1 0
44 SDSS J140334.28+015117.5 bCG 14 03 34.28935 +01 51 17.5536           ~ 1 0
45 SDSS J140947.30+011611.4 bCG 14 09 47.301 +01 16 11.46           ~ 4 0
46 SDSS J145107.11+023125.0 bCG 14 51 07.11704 +02 31 25.0288           ~ 2 0
47 SDSS J145107.42+024328.1 bCG 14 51 07.422 +02 43 28.14           ~ 5 0
48 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 222 0
49 DES J201423.68-534803.5 bCG 20 14 23.684880 -53 48 03.51360           ~ 1 0
50 DES J203054.89-471941.6 bCG 20 30 54.898560 -47 19 41.70000           ~ 1 0
51 DES J203609.85-491838.2 bCG 20 36 09.856320 -49 18 38.22840           ~ 1 0
52 DES J204402.95-573102.1 bCG 20 44 02.952000 -57 31 02.15040           ~ 1 0
53 DES J205137.73-455924.6 bCG 20 51 37.737600 -45 59 24.60120           ~ 1 0
54 DES J205240.44-451747.1 bCG 20 52 40.445760 -45 17 47.10120           ~ 1 0
55 DES J205556.72-540559.1 bCG 20 55 56.725440 -54 05 59.11440           ~ 1 0
56 DES J210953.42-522836.5 bCG 21 09 53.429040 -52 28 36.53760           ~ 1 0
57 DES J211749.95-592030.9 bCG 21 17 49.953840 -59 20 30.91200           ~ 1 0
58 DES J212009.20-505430.1 bCG 21 20 09.209280 -50 54 30.17520           ~ 1 0
59 DES J220303.95-401303.5 bCG 22 03 03.952080 -40 13 03.52920           ~ 1 0
60 DES J220504.95-630328.7 bCG 22 05 04.950480 -63 03 28.79640           ~ 1 0
61 DES J220540.77-421825.2 bCG 22 05 40.776480 -42 18 25.25040           ~ 1 0
62 DES J221234.77-452736.8 bCG 22 12 34.772640 -45 27 36.88920           ~ 1 0
63 DES J221331.82-432038.1 bCG 22 13 31.825200 -43 20 38.15520           ~ 1 0
64 DES J223724.75-484528.1 bCG 22 37 24.752160 -48 45 28.14480           ~ 1 0
65 DES J232613.47-452359.7 bCG 23 26 13.477200 -45 23 59.79120           ~ 1 0

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