2014A&A...568L...8A


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST03:45:24

2014A&A...568L...8A - Astronomy and Astrophysics, volume 568, L8-8 (2014/8-1)

Discovering extremely compact and metal-poor, star-forming dwarf galaxies out to z ∼ 0.9 in the VIMOS Ultra-Deep Survey.

AMORIN R., SOMMARIVA V., CASTELLANO M., GRAZIAN A., TASCA L.A.M., FONTANA A., PENTERICCI L., CASSATA P., GARILLI B., LE BRUN V., LE FEVRE O., MACCAGNI D., THOMAS R., VANZELLA E., ZAMORANI G., ZUCCA E., BARDELLI S., CAPAK P., CASSARA L.P., CIMATTI A., CUBY J.G., CUCCIATI O., DE LA TORRE S., DURKALEC A., GIAVALISCO M., HATHI N.P., ILBERT O., LEMAUX B.C., MOREAU C., PALTANI S., RIBEIRO B., SALVATO M., SCHAERER D., SCODEGGIO M., TALIA M., TANIGUCHI Y., TRESSE L., VERGANI D., WANG P.W., CHARLOT S., CONTINI T., FOTOPOULOU S., LOPEZ-SANJUAN C., MELLIER Y. and SCOVILLE N.

Abstract (from CDS):

We report the discovery of 31 low-luminosity (-14.5>MAB(B)>-18.8), extreme emission line galaxies (EELGs) at 0.2≲z≲0.9 identified by their unusually high rest-frame equivalent widths (100≤EW[OIII]≤1700Å) as part of the VIMOS Ultra Deep Survey (VUDS). VIMOS optical spectra of unprecedented sensitivity (IAB∼25mag) along with multiwavelength photometry and HST imaging are used to investigate spectrophotometric properties of this unique sample and to explore, for the first time, the very low stellar mass end (M*≲108M ) of the luminosity-metallicity (LZR) and mass-metallicity (MZR) relations at z<1. Characterized by their extreme compactness (R50<1kpc), low stellar mass and enhanced specific star formation rates (sSFR=SFR/M *∼10–9-10–7/yr), the VUDS EELGs are blue dwarf galaxies likely experiencing the first stages of a vigorous galaxy-wide starburst. Using Te-sensitive direct and strong-line methods, we find that VUDS EELGs are low-metallicity (7.5≲12+log(O/H)≲8.3) galaxies with high ionization conditions (log(qion)>8cm/s), including at least three EELGs showing HeIIλ4686Å emission and four extremely metal-poor (≲10% solar) galaxies. The LZR and MZR followed by VUDS EELGs show relatively large scatter, being broadly consistent with the extrapolation toward low luminosity and mass from previous studies at similar redshift. However, we find evidence that galaxies with younger and more vigorous star formation - as characterized by their larger EWs, ionization and sSFR - tend to be more metal poor at a given stellar mass.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: high-redshift - galaxies: starburst - galaxies: abundances - galaxies: dwarf - galaxies: fundamental parameters

VizieR on-line data: <Available at CDS (J/A+A/568/L8): table1.dat table2.dat>

Simbad objects: 33

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Number of rows : 33

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 VUDS 520276545 EmG 02 25 09.248 -04 30 01.49         24.895 ~ 2 0
2 VUDS 520281627 EmG 02 25 19.841 -04 29 34.12         23.589 ~ 2 0
3 VUDS 520290391 EmG 02 25 33.706 -04 28 36.83         24.928 ~ 2 0
4 VUDS 520246239 EmG 02 25 56.554 -04 33 08.01         24.244 ~ 2 0
5 VUDS 520327062 EmG 02 26 22.225 -04 24 51.78         23.929 ~ 2 0
6 VUDS 520388031 EmG 02 26 28.284 -04 18 37.75         24.194 ~ 2 0
7 VUDS 520420821 EmG 02 26 34.426 -04 15 16.54         23.537 ~ 2 0
8 VUDS 520349673 EmG 02 26 39.926 -04 22 34.80         23.623 ~ 2 0
9 VUDS 520316717 EmG 02 26 52.599 -04 25 57.40         24.213 ~ 2 0
10 VUDS 520433508 EmG 02 27 07.877 -04 13 51.39         24.777 ~ 2 0
11 VUDS 520344687 EmG 02 27 15.165 -04 23 03.16         24.974 ~ 2 0
12 VUDS 530076899 EmG 03 31 55.468 -27 35 02.27         25.388 ~ 2 0
13 VUDS 530076254 EmG 03 32 13.640 -27 35 17.58         24.545 ~ 2 0
14 VUDS 530080539 EmG 03 32 15.087 -27 33 39.18         24.426 ~ 2 0
15 PEARS s112157 EmG 03 32 15.829 -27 43 51.30   24.61 23.94   24.330 ~ 8 0
16 VUDS 530046029 EmG 03 32 20.499 -27 46 21.05         24.577 ~ 4 0
17 VUDS 530048721 EmG 03 32 40.381 -27 45 23.42         25.186 ~ 4 0
18 VUDS 530043711 EmG 03 32 59.018 -27 47 10.57         24.136 ~ 2 0
19 VUDS 530079125 EmG 03 33 01.563 -27 34 09.70         25.204 ~ 2 0
20 [PBT2001] SBSG 0335-052 W G 03 37 38.40 -05 02 37.5   19.14     18.85 ~ 97 1
21 SBSG 0335-052B G 03 37 44.04 -05 02 40.2   16.77 16.65   16.79 ~ 140 1
22 VUDS 510830468 EmG 09 59 09.269 +02 01 52.50         24.302 ~ 2 0
23 VUDS 510146174 EmG 09 59 09.658 +01 59 17.71         24.995 ~ 2 0
24 VUDS 511475480 EmG 09 59 43.09 +02 33 56.9   25.566 25.593   24.336 ~ 2 0
25 VUDS 510573089 EmG 09 59 44.22 +01 56 14.2 25.31 25.00 24.35 24.08 23.45 ~ 3 0
26 VUDS 510809459 EmG 09 59 52.20 +02 00 03.8   25.410 25.339   24.449 ~ 2 0
27 VUDS 510352169 EmG 09 59 59.59 +01 47 12.6 25.26 25.19 24.87 24.73 23.84 ~ 4 0
28 VUDS 510229076 EmG 10 00 11.84 +02 08 15.8 25.77 25.55 25.04 24.92 24.95 ~ 3 0
29 [MMS2013] 124987 EmG 10 00 20.21 +02 15 58.8 25.95 25.55 25.03 24.70 24.50 ~ 6 0
30 VUDS 510175664 EmG 10 00 27.136 +02 02 34.63         24.976 ~ 2 0
31 VUDS 5120568170 EmG 10 00 42.67 +01 48 11.2 26.57 26.43 25.40 25.14 25.08 ~ 3 0
32 VUDS 5101659094 EmG 10 01 18.49 +02 38 50.4 25.51 25.34 25.05 24.61 24.03 ~ 4 0
33 VUDS 5101657178 EmG 10 01 33.12 +02 39 38.7 25.44 25.30 24.85 24.59 24.27 ~ 4 0

    Equat.    Gal    SGal    Ecl

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2019.10.23-03:45:24

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