2001ApJ...559..620P


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.28CET10:57:41

2001ApJ...559..620P - Astrophys. J., 559, 620-653 (2001/October-1)

The stellar populations and evolution of Lyman break galaxies.

PAPOVICH C., DICKINSON M. and FERGUSON H.C.

Abstract (from CDS):

Using deep near-infrared and optical observations of the Hubble Deep Field-North from the Hubble Space Telescope NICMOS and WFPC2 instruments and from the ground, we examine the spectral energy distributions (SEDs) of Lyman break galaxies (LBGs) at 2.0≲z≲3.5 in order to investigate their stellar population properties. The ultraviolet-optical rest-frame SEDs of the galaxies are much bluer than those of present-day spiral and elliptical galaxies and are generally similar to those of local starburst galaxies with modest amounts of reddening. We use stellar population synthesis models to study the properties of the stars that dominate the light from LBGs. Under the assumption that the star formation rate is continuous or decreasing with time, the best-fitting models provide a lower bound on the LBG mass estimates. LBGs with ``L*'' UV luminosities are estimated to have minimum stellar masses ∼1010 M, or roughly 1/10 that of a present-day L* galaxy, similar to the mass of the Milky Way bulge. By considering the photometric effects of a second stellar population component of maximally old stars, we set an upper bound on the stellar masses that is ∼3-8 times the minimum mass estimate. The stellar masses derived for bright LBGs are similar to published estimates of their dynamical masses based on nebular emission line widths, suggesting that such kinematic measurements may substantially underestimate the total masses of the dark matter halos. We find only loose constraints on the individual galaxy ages, extinction, metallicities, initial mass functions, and prior star formation histories. Most LBGs are well fitted by models with population ages that range from 30 Myr to ∼1 Gyr, although for models with subsolar metallicities a significant minority of galaxies are well fitted by very young (≲10 Myr), very dusty stellar populations, A(1700 Å)>2.5 mag. We find no galaxies whose SEDs are consistent with young (≲108 yr), dust-free objects, which suggests that LBGs are not dominated by ``first-generation'' stars and that such objects are rare at these redshifts. We also find that the typical ages for the observed star formation events are significantly younger than the time interval covered by this redshift range (∼1.5 Gyr). From this, and from the relative absence of candidates for quiescent, non-star-forming galaxies at these redshifts in the NICMOS data that might correspond to the fading remnants of galaxies formed at higher redshift, we suggest that star formation in LBGs may be recurrent, with short duty cycles and a timescale between star formation events of ≲1 Gyr.

Abstract Copyright:

Journal keyword(s): Galaxies: Evolution - Galaxies: High-Redshift - Galaxies: Starburst - Galaxies: Stellar Content - Infrared: Galaxies

Nomenclature: Table 2: HNM NNNN N=33 among (Nos 67-1541).

Simbad objects: 42

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Number of rows : 42

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11159 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9661 1
3 NGC 1705 SBG 04 54 13.500 -53 21 39.82 12.32 12.96 12.56 12.58 12.9 ~ 603 1
4 CXOHDFN J123639.6+621230 Sy1 12 36 39.60 +62 12 30.2 24.9 24.2 23.9 24.40 23.83 ~ 33 0
5 [CBH2004] 189.171524+62.20088 PoG 12 36 41.225 +62 12 02.94 27.2 25.1 24.4 24.1 23.9 ~ 7 0
6 [VAE96] 4-625 G 12 36 41.25 +62 12 02.8   25.4 24.3   23.5 ~ 13 0
7 HPS 389 EmG 12 36 41.77 +62 12 39.1   24.8 24.7 24.46 23.8 ~ 10 0
8 GOODS J123644.07+621410.4 G 12 36 44.0662 +62 14 10.383 24.41 24.6431 25.02 24.26 24.5662 ~ 35 0
9 [RSE2006] C16 G 12 36 44.1093 +62 13 10.790 27.91 26.5 25.00 23.84   ~ 21 0
10 Cowie 83 G 12 36 44.6475 +62 12 27.773 24.24 24.4064 24.49 23.66 23.7284 ~ 40 0
11 MODS deep 1523 G 12 36 45.0814 +62 12 51.205 24.6 25.6344 25.04 24.37 25.4795 ~ 21 0
12 [WBD96] 4-555.0 G 12 36 45.3391 +62 11 54.847 25.94 26.3275 25.36   23.3682 ~ 26 0
13 [CHB2000] H3645.36-1346.8 G 12 36 45.359 +62 13 47.00   25.52 24.92 25.15   ~ 9 0
14 HNM 1357 PoG 12 36 45.4142 +62 11 53.475 25.8 25.2646 24.77 23.3 24.2090 ~ 17 0
15 HNM 1352 G 12 36 45.7416 +62 11 57.350 27.6 26.5 26.2     ~ 14 0
16 GOODS J123645.88+621412.4 G 12 36 45.8827 +62 14 12.425 25.3 25.3107   24.85 24.7711 ~ 19 0
17 GOODS J123646.94+621226.4 EmG 12 36 46.9419 +62 12 26.419 30.48 25.6379 25.34 25.13 24.9678 ~ 28 0
18 [CBH2004] 189.198837+62.21560 G 12 36 47.7198 +62 12 56.163 28.2 25.9537 25.56 24.4 25.3198 ~ 24 0
19 [WBD96] 3-88.0 G 12 36 47.8880 +62 12 55.666   27.2916 25.79   24.7826 ~ 12 0
20 [T2003] 752 G 12 36 48.2365 +62 14 18.796 25.2 24.6351 24.84 24.6 24.1331 ~ 22 1
21 GOODS J123648.31+621146.3 G 12 36 48.3067 +62 11 46.256 25.55 25.8707 25.50 24.58 24.6596 ~ 23 0
22 [T2003] 761 G 12 36 48.3100 +62 14 16.987 24.76 24.0079 24.09 23.58 23.5166 ~ 41 1
23 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1842 1
24 [WBD96] 2-585.2 G 12 36 49.5666 +62 14 15.111 25.8 25.3941 25.74   24.1746 ~ 15 0
25 HNM 947 G 12 36 49.8098 +62 12 49.190   26.6098 25.83 25.13 25.2221 ~ 18 0
26 HNM 163 G 12 36 49.877 +62 14 15.25           ~ 8 0
27 Cowie 124 EmG 12 36 50.1036 +62 14 01.477 25.05 25.0662 25.31 24.55 24.5726 ~ 34 0
28 MODS deep 2750 G 12 36 51.2061 +62 13 48.865 26.71 26.1 25.78 24.84   ~ 11 0
29 NAME SMM J123652+621225 G 12 36 51.730 +62 12 21.44 24.2 23.4 22.3 22.0 25.80 ~ 171 1
30 [BIO2015] GNDB-6524313381 EmG 12 36 52.4062 +62 13 37.825   27.1 25.84 25.08   ~ 14 1
31 HNM 516 G 12 36 52.7467 +62 13 39.149   26.7 25.62 25.03   ~ 26 1
32 HNM 284 G 12 36 52.989 +62 14 08.47           ~ 8 0
33 GOODS J123653.18+621323.1 G 12 36 53.1791 +62 13 23.101 26.5 25.5297 25.38 24.53 24.7515 ~ 19 0
34 GOODS J123653.43+621329.8 G 12 36 53.4261 +62 13 29.798 27.5 26.0267 25.23 24.64 24.6451 ~ 28 0
35 Cowie 151 G 12 36 53.5865 +62 14 10.495   25.7728 25.35 24.78 24.5673 ~ 27 0
36 HNM 561 EmG 12 36 54.6225 +62 13 41.362 26.6 25.73 25.60 25.20   ~ 21 1
37 [WBD96] 3-118.1 G 12 36 54.7172 +62 13 15.121 24.68 24.7212 24.75 24.15 24.3819 ~ 29 0
38 Cowie 118 EmG 12 36 55.0618 +62 13 47.430 24.77 24.7692 24.95 24.23 24.5698 ~ 33 1
39 NAME HDFN-JD1 G 12 36 56.4190 +62 13 21.839           ~ 9 0
40 [T2003] 1909 G 12 37 00.0840 +62 12 25.612 24.51 24.2107 24.53 23.83 23.7417 ~ 27 0
41 NAME MS 1512-cB58 AGN 15 14 22.2751 +36 36 25.674     20.64   20.35 ~ 318 0
42 CNOC MS 1512 101094 G 15 14 22.482 +36 36 21.08           ~ 146 1

    Equat.    Gal    SGal    Ecl

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2021.01.28-10:57:41

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