2017ApJ...849...39S

Query : 2017ApJ...849...39S

2017ApJ...849...39S - Astrophys. J., 849, 39-39 (2017/November-8)

The interstellar medium in [O III]-selected star-forming galaxies at z ∼ 3.2.

SUZUKI T.L., KODAMA T., ONODERA M., SHIMAKAWA R., HAYASHI M., TADAKI K.-I., KOYAMA Y., TANAKA I., SOBRAL D., SMAIL I., BEST P.N., KHOSTOVAN A.A., MINOWA Y. and YAMAMOTO M.

Abstract (from CDS):

We present new results from near-infrared spectroscopy with Keck/MOSFIRE of [O III]-selected galaxies at z∼3.2. With our H and K band spectra, we investigate the interstellar medium (ISM) conditions, such as ionization states and gas metallicities. [O III] emitters at z∼3.2 show a typical gas metallicity of 12+log(O/H)=8.07±0.07 at log(M*/M☉) ∼ 9.0–9.2 and 12+log(O/H)=8.31±0.04 at log(M*/M☉) ∼ 9.7–10.2 when using the empirical calibration method. We compare the [O III] emitters at z∼3.2 with UV-selected galaxies and Lyα emitters at the same epoch and find that the [O III]-based selection does not appear to show any systematic bias in the selection of star-forming galaxies. Moreover, comparing with star-forming galaxies at z∼2 from the literature, our samples show similar ionization parameters and gas metallicities as those obtained by the previous studies that used the same calibration method. We find no strong redshift evolution in the ISM conditions between z∼3.2 and z∼2. Considering that the star formation rates at a fixed stellar mass also do not significantly change between the two epochs, our results support the idea that the stellar mass is the primary quantity to describe the evolutionary stages of individual galaxies at z 2.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: evolution - galaxies: high-redshift - galaxies: ISM - galaxies: ISM

Nomenclature: Tables 1-2: [SKO2017] O3E-NN (Nos 1-11), [SKO2017] NNNNNN N=7 among (Nos 359521-368172).

CDS comments: Table 1, col. 3: HiZELS identifiers are not in SIMBAD.

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 - 2026 		#notes
1 HD 74721 HB* 08 45 59.2614567408 +13 15 48.591616392 8.88 8.75 8.72     A0V 166 0
2 [SKO2017] 368172 G 09 59 43.7 +01 40 45           ~ 1 0
3 [SKO2017] O3E-10 G 09 59 46.0 +01 42 34           ~ 1 0
4 [SKO2017] O3E-4 G 09 59 46.0 +01 41 10           ~ 1 0
5 [SKO2017] 361492 G 09 59 46.3 +01 43 13           ~ 1 0
6 [SKO2017] O3E-1 G 09 59 47.6 +01 41 41           ~ 1 0
7 [SKO2017] O3E-5 G 09 59 49.4 +01 40 49           ~ 2 0
8 [SKO2017] O3E-8 G 09 59 52.3 +01 44 00           ~ 1 0
9 [SKO2017] 363778 G 09 59 53.5 +01 42 36           ~ 1 0
10 [SKO2017] O3E-3 G 09 59 54.0 +01 41 38           ~ 2 0
11 [SKO2017] O3E-2 G 09 59 54.6 +01 41 42           ~ 1 0
12 [SKO2017] O3E-7 G 09 59 57.3 +01 44 00           ~ 1 0
13 [SKO2017] O3E-11 G 09 59 57.3 +01 42 06           ~ 1 0
14 [SKO2017] 363271 G 09 59 59.4 +01 42 46           ~ 1 0
15 [SKO2017] 359521 G 10 00 01.0 +01 44 20           ~ 1 0
16 [SKO2017] 361009 G 10 00 01.1 +01 43 40           ~ 1 0
17 [SKO2017] 360961 G 10 00 01.8 +01 43 44           ~ 1 0
18 [SKO2017] O3E-9 G 10 00 05.1 +01 43 38           ~ 1 0
19 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0

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