2013A&A...551A..93G


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.11CET11:52:34

2013A&A...551A..93G - Astronomy and Astrophysics, volume 551A, 93-93 (2013/3-1)

Magellan/MMIRS near-infrared multi-object spectroscopy of nebular emission from star-forming galaxies at 2 < z < 3.

GUAITA L., FRANCKE H., GAWISER E., BAUER F.E., HAYES M., OESTLIN G. and PADILLA N.

Abstract (from CDS):

To investigate the ingredients, which allow star-forming galaxies to present Lyα line in emission, we studied the kinematics and gas phase metallicity of the interstellar medium. We used multi-object near-infrared spectroscopy with Magellan/MMIRS to study nebular emission from z≃2-3 star-forming galaxies discovered in three MUSYC fields. We detected emission lines from four active galactic nuclei and 13 high-redshift star-forming galaxies, including Hα lines down to a flux of (4±1)E-17erg/s/cm2. This yielded seven new redshifts. The most common emission line detected is [OIII]5007, which is sensitive to metallicity. We were able to measure metallicity (Z) for two galaxies and to set upper (lower) limits for another two (two). The metallicity values are consistent with 0.3<Z/Z<1.2, 12+log(O/H)∼8.2-8.8. Comparing the Lyα central wavelength with the systemic redshift, we find ΔvLyα–[OIII]5007=70-270km/s. High-redshift star-forming galaxies, Lyα emitting (LAE) galaxies, and Hα emitters appear to be located in the low mass, high star-formation rate (SFR) region of the SFR versus stellar mass diagram, confirming that they are experiencing burst episodes of star formation, which are building up their stellar mass. Their metallicities are consistent with the relation found for z≤2.2 galaxies in the Z versus stellar mass plane. The measured ΔvLyα–[OIII]5007 values imply that outflows of material, driven by star formation, could be present in the z∼2-3 LAEs of our sample. Comparing with the literature, we note that galaxies with lower metallicity than ours are also characterized by similar ΔvLyα–[OIII]5007 velocity offsets. Strong F([OIII]5007) is detected in many Lyα emitters. Therefore, we propose the F(Lyα)/F([OIII]5007) flux ratio as a tool for the study of high-redshift galaxies; while influenced by metallicity, ionization, and Lyα radiative transfer in the ISM, it may be possible to calibrate this ratio to primarily trace one of these effects.

Abstract Copyright:

Journal keyword(s): techniques: spectroscopic - galaxies: high-redshift - galaxies: star formation

VizieR on-line data: <Available at CDS (J/A+A/551/A93): table3.dat table4.dat>

Nomenclature: Table 3: [GFG2013] AGNNN (Nos AGN5, AGN26), [GFG2013] BzK25 N=1, [GFG2013] BXNN N=6 among (Nos 1-16), [GFG2013] LAE27 N=1, [GFG2013] zNLAEN (Nos z2LAE2-3, z3LAE2), [GFG2013] DBNN (Nos 8,12,22), [GFG2013] LBG11 N=1.

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [GCH2007] 11 EmO 03 32 26.937 -27 41 27.94     25.16 24.13   ~ 7 0
2 ZFOURGE CDFS 18531 EmG 03 32 27.10690 -27 46 43.2772 25.21 24.42 24.42 24.48 24.46 ~ 6 0
3 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 591 0
4 CXOCDFS J033231.5-274624 AGN 03 32 31.46027 -27 46 23.1871 25.05 23.96 23.64 23.28 23.001 ~ 75 0
5 [GFG2013] DB12 G 03 32 31.520 -27 43 51.38       24.51   ~ 1 0
6 ZFOURGE CDFS 15357 G 03 32 33.780 -27 48 14.35   24.6260   24.652 24.55 ~ 10 0
7 [GFG2013] DB8 G 03 32 36.140 -27 42 23.07   27.81       ~ 7 0
8 ZFOURGE CDFS 20465 G 03 32 41.320 -27 45 49.15 27.3570 26.6317 26.3566 26.43   ~ 9 0
9 ZFOURGE CDFS 24415 G 03 32 43.635 -27 43 47.79   24.503 24.23 24.101   ~ 9 0
10 [WDK2001] 33096 G 03 32 50.84011 -27 48 04.6652   23.701   23.611 23.63 ~ 6 0
11 [GCH2007] 6 G 03 32 52.690 -27 48 09.28     25.38 25.51   ~ 6 0
12 [GFG2013] z2LAE2 EmG 10 30 07.600 +05 21 39.70       25.02   ~ 1 0
13 [GFG2013] BX4 G 10 30 10.250 +05 22 15.77       25.23   ~ 1 0
14 [GFG2013] BX7 G 10 30 13.390 +05 22 37.85       23.87   ~ 1 0
15 [GFG2013] BX14 G 10 30 18.860 +05 21 40.87       24.18   ~ 1 0
16 [GFG2013] AGN26 AGN 10 30 30.100 +05 21 06.19       21.49   ~ 1 0
17 NAME HDF-S reg 22 32 56 -60 33.0           ~ 535 0
18 [GFG2013] LBG11 G 22 33 22.540 -60 38 49.63       24.55   ~ 1 0
19 [GFG2013] z2LAE3 EmG 22 33 43.7210981745 -60 39 44.606070269       24.25   ~ 1 0

    Equat.    Gal    SGal    Ecl

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2019.12.11-11:52:34

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