2016ApJ...816...16J


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.25CEST10:29:56

2016ApJ...816...16J - Astrophys. J., 816, 16 (2016/January-1)

Physical properties of spectroscopically confirmed galaxies at z ≥ 6. III. Stellar populations from SED modeling with secure Lyα emission and redshifts.

JIANG L., FINLATOR K., COHEN S.H., EGAMI E., WINDHORST R.A., FAN X., DAVE R., KASHIKAWA N., MECHTLEY M., OUCHI M., SHIMASAKU K. and CLEMENT B.

Abstract (from CDS):

We present a study of stellar populations in a sample of spectroscopically confirmed Lyman-break galaxies (LBGs) and Lyα emitters (LAEs) at 5.7 < z < 7. These galaxies have deep images from Subaru, the Hubble Space Telescope, and Spitzer/IRAC. We focus on 27 galaxies with IRAC detections, and characterize their stellar populations based on the multi-band data and secure redshifts. By estimating nebular emission from the observed Lyα flux, we break the strong model degeneracy between young galaxies with prominent nebular emission and older galaxies with strong Balmer breaks. The results show that our galaxies cover a wide range of ages from several to a few hundred million years (Myr), and stellar masses from ∼108 to ∼1011 M These galaxies can be roughly divided into two subsamples: an ''old'' subsample consisting of galaxies older than 100 Myr, with stellar masses higher than 109M and a ''young'' subsample consisting of galaxies younger than ∼30 Myr, with masses ranging between ∼108 and ∼ 3 w 109M. Both subsamples display a correlation between stellar mass and star formation rate (SFR), but with very different normalizations. The average specific SFR (sSFR) of the ''old'' subsample is 3-4 G/yr, consistent with previous studies of ''normal'' star-forming galaxies at z ≥ 6. The average sSFR of the ''young'' subsample is an order of magnitude higher, likely due to starburst activity. Our results also indicate little dust extinction in the majority of the galaxies, as already suggested by their steep rest-frame UV slopes. Finally, LAEs and LBGs with strong Lyα emission are indistinguishable in terms of age, stellar mass, and SFR.

Abstract Copyright:

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

Simbad objects: 44

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Number of rows : 44

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 [JEM2013] 64 G 02 17 35.337 -05 10 32.50           ~ 7 0
2 NAME Himiko EmG 02 17 57.6122 -05 08 44.898           ~ 88 0
3 UUDS J021800.90-051137.8 G 02 18 00.899 -05 11 37.69           ~ 6 0
4 [OSF2010] NB921-C-22057 EmG 02 18 20.6670 -05 11 09.664           ~ 3 0
5 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1293 0
6 [TAN2005] 24 EmG 13 23 43.190 +27 24 52.04           ~ 5 0
7 [SKD2006] 71751 EmG 13 23 44.747 +27 24 26.81           ~ 5 0
8 [TAN2005] 61 EmG 13 23 44.896 +27 31 44.90           ~ 4 0
9 [NTK2004] SDF J132345.6+271701 EmG 13 23 45.632 +27 17 00.53           ~ 5 0
10 IOK 5 EmG 13 23 45.7580 +27 32 51.342           ~ 5 0
11 [JEM2013] 36 G 13 23 45.937 +27 25 18.06           ~ 3 0
12 [TAN2005] 26 EmG 13 23 48.922 +27 15 30.33           ~ 4 0
13 [TAN2005] 1 EmG 13 23 52.680 +27 16 21.76           ~ 4 0
14 [TAN2005] 2 EmG 13 23 53.054 +27 16 30.75           ~ 5 0
15 [SKD2006] 70600 EmG 13 23 54.601 +27 24 12.72           ~ 5 0
16 IOK 1 G 13 23 59.766 +27 24 55.75           ~ 52 0
17 [JEM2013] 30 G 13 24 00.301 +27 32 37.95           ~ 4 0
18 [JEM2013] 29 EmG 13 24 05.8940 +27 18 37.703           ~ 5 0
19 [TAN2005] 3 EmG 13 24 08.313 +27 15 43.49           ~ 10 0
20 [JEM2013] 27 EmG 13 24 10.7690 +27 19 03.918           ~ 5 0
21 [TAN2005] 11 EmG 13 24 10.817 +27 19 28.08           ~ 5 0
22 [SKD2006] 152586 EmG 13 24 11.887 +27 41 31.81           ~ 5 0
23 [TAN2005] 4 EmG 13 24 15.678 +27 30 57.79           ~ 12 0
24 [SKD2006] 46904 EmG 13 24 16.468 +27 19 07.65           ~ 5 0
25 [TAN2005] 12 EmG 13 24 17.909 +27 17 45.94           ~ 5 0
26 [TAN2005] 6 EmG 13 24 18.416 +27 33 44.97           ~ 4 0
27 [JEM2013] 23 G 13 24 18.450 +27 16 32.56           ~ 3 0
28 [TKO2012] 14 EmG 13 24 20.6260 +27 16 40.408           ~ 6 0
29 NAME Subaru Deep Field NGP reg 13 24 21.3 +27 29 23           ~ 303 1
30 [SKD2006] 113271 EmG 13 24 23.705 +27 33 24.82           ~ 5 0
31 [TKO2012] 9 EmG 13 24 26.50 +27 15 59.7           ~ 8 0
32 [SKD2006] 95588 EmG 13 24 30.633 +27 29 34.61   28.3       ~ 5 0
33 [SKD2006] 98040 EmG 13 24 32.885 +27 30 08.82           ~ 5 0
34 [SKD2006] 96007 EmG 13 24 33.097 +27 29 38.58           ~ 5 0
35 [TAN2005] SDF J132435.0+273957 EmG 13 24 35.005 +27 39 57.43           ~ 5 0
36 [TAN2005] 43 EmG 13 24 40.239 +27 25 53.11           ~ 5 0
37 [SKD2006] 20087 EmG 13 24 40.527 +27 13 57.91           ~ 5 0
38 [NTK2004] SDF J132440.6+273607 EmG 13 24 40.643 +27 36 06.94           ~ 12 0
39 [SKD2006] 83092 EmG 13 24 41.264 +27 26 49.09           ~ 4 0
40 [NTK2004] SDF J132442.5+272423 EmG 13 24 42.452 +27 24 23.35           ~ 7 0
41 [TAN2005] 44 EmG 13 24 43.427 +27 26 32.62           ~ 5 0
42 [TAN2005] 51 EmG 13 24 55.772 +27 40 15.31           ~ 5 0
43 [NTK2004] SDF J132519.4+271829 EmG 13 25 19.463 +27 18 28.51           ~ 5 0
44 [TAN2005] 9 EmG 13 25 22.291 +27 35 19.95           ~ 5 0

    Equat.    Gal    SGal    Ecl

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2020.09.25-10:29:57

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