2013ApJ...778L..24L

Query : 2013ApJ...778L..24L

2013ApJ...778L..24L - Astrophys. J., 778, L24 (2013/December-1)

Exploring the chemical link between local ellipticals and their high-redshift progenitors.

LEJA J., VAN DOKKUM P.G., MOMCHEVA I., BRAMMER G., SKELTON R.E., WHITAKER K.E., ANDREWS B.H., FRANX M., KRIEK M., VAN DER WEL A., BEZANSON R., CONROY C., FORSTER SCHREIBER N., NELSON E. and PATEL S.G.

Abstract (from CDS):

We present Keck/MOSFIRE K-band spectroscopy of the first mass-selected sample of galaxies at z ∼ 2.3. Targets are selected from the 3D-Hubble Space Telescope Treasury survey. The six detected galaxies have a mean [N II]λ6584/Hα ratio of 0.27±0.01, with a small standard deviation of 0.05. This mean value is similar to that of UV-selected galaxies of the same mass. The mean gas-phase oxygen abundance inferred from the [N II]/Hα ratios depends on the calibration method, and ranges from 12+log(O/H)gas= 8.57 for the Pettini & Pagel calibration to 12+log(O/H)gas= 8.87 for the Maiolino et al. calibration. Measurements of the stellar oxygen abundance in nearby quiescent galaxies with the same number density indicate 12+log(O/H)stars= 8.95, similar to the gas-phase abundances of the z ∼ 2.3 galaxies if the Maiolino et al. calibration is used. This suggests that these high-redshift star forming galaxies may be progenitors of today's massive early-type galaxies. The main uncertainties are the absolute calibration of the gas-phase oxygen abundance and the incompleteness of the z ∼ 2.3 sample: the galaxies with detected Hα tend to be larger and have higher star formation rates than the galaxies without detected Hα, and we may still be missing the most dust-obscured progenitors.

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Journal keyword(s): galaxies: abundances - galaxies: evolution

Nomenclature: Table 1: [LVM2013] NNNNN N=16 among (Nos 2522-24828).

Simbad objects: 16

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Number of rows : 16
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 CANDELS UDS F160W J021732.42-051132.5 G 02 17 32.43 -05 11 32.5     28.068 27.698   ~ 7 0
2 CANDELS UDS F160W J021736.00-051336.2 EmG 02 17 36.00 -05 13 36.4   25.133 24.318 24.139   ~ 8 0
3 CANDELS UDS F160W J021737.02-051202.9 G 02 17 37.02 -05 12 03.0   27.414 27.106 27.177   ~ 4 0
4 CANDELS UDS F160W J021737.39-051307.8 G 02 17 37.39 -05 13 07.9   27.647 26.725 26.055   ~ 10 0
5 CANDELS UDS F160W J021738.47-051117.0 G 02 17 38.47 -05 11 17.4   25.184 24.764 24.674   ~ 5 0
6 CANDELS UDS F160W J021739.78-051018.7 AG? 02 17 39.79 -05 10 18.7   27.698 26.942 26.936   ~ 8 0
7 CANDELS UDS F160W J021741.31-051314.6 G 02 17 41.32 -05 13 14.6     27.675 27.276   ~ 7 0
8 CANDELS UDS F160W J021741.41-051335.6 G 02 17 41.42 -05 13 35.7   26.059 25.429 25.356   ~ 5 0
9 CANDELS UDS F160W J021742.07-050952.2 G 02 17 42.07 -05 09 52.2   25.121 24.741 24.638   ~ 3 0
10 CANDELS UDS F160W J021742.56-051552.9 G 02 17 42.56 -05 15 53.0   25.246 24.581 24.421   ~ 3 0
11 CANDELS UDS F160W J021742.59-051411.3 G 02 17 42.60 -05 14 11.3   27.403 26.598 26.617   ~ 3 0
12 CANDELS UDS F160W J021742.67-051358.3 G 02 17 42.67 -05 13 58.3   28.231 27.180 26.962   ~ 4 0
13 CANDELS UDS F160W J021743.44-051501.5 G 02 17 43.44 -05 15 01.5   28.156 28.065 27.543   ~ 3 0
14 CANDELS UDS F160W J021747.16-051456.0 G 02 17 47.16 -05 14 56.1   26.843 26.322 26.461   ~ 4 0
15 CANDELS UDS F160W J021747.32-051318.8 G 02 17 47.33 -05 13 18.8   27.262 26.772 26.764   ~ 2 0
16 CANDELS UDS F160W J021750.41-051527.2 G 02 17 50.41 -05 15 27.3   28.317 27.645 27.257   ~ 6 0

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