2010MNRAS.402.1580O


Query : 2010MNRAS.402.1580O

2010MNRAS.402.1580O - Mon. Not. R. Astron. Soc., 402, 1580-1598 (2010/March-1)

Stellar populations of Lyα emitters at z = 3-4 based on deep large area surveys in the Subaru-SXDS/UKIDSS-UDS field.

ONO Y., OUCHI M., SHIMASAKU K., AKIYAMA M., DUNLOP J., FARRAH D., LEE J.C., McLURE R., OKAMURA S. and YOSHIDA M.

Abstract (from CDS):

We investigate the stellar populations of Lyα emitters (LAEs) at z = 3.1 and 3.7 in 0.65 deg2 of the Subaru/XMM-Newton Deep Field, based on rest-frame ultraviolet-to-optical photometry obtained from the Subaru/XMM-Newton Deep Survey, the UKIRT Infrared Deep Sky Survey/Ultra Deep Survey (UKIDSS/UDS), and the Spitzer legacy survey of the UKIDSS/UDS. Among a total of 302 LAEs (224 for z = 3.1 and 78 for z = 3.7), only 11 are detected in the K band, i.e. brighter than K(3σ) = 24.1 mag. Eight of the 11 K-detected LAEs are spectroscopically confirmed. In our stellar population analysis, we treat K-detected objects individually, while K-undetected objects are stacked at each redshift. We find that the K-undetected objects, which should closely represent the LAE population as a whole, have low stellar masses of ∼108-108.5M, modest star formation rates (SFRs) of 1-100M/yr, and modest dust extinction of E(B - V)*< 0.2. The K-detected objects are massive, Mstar∼ 109-1010.5M, and have significant dust extinction with a median of E(B - V)*≃ 0.3. Four K-detected objects with the reddest spectral energy distributions, two of which are spectroscopically confirmed, are heavily obscured with E(B - V)*∼ 0.65, and their continua resemble those of some local ultraluminous infrared galaxies (ULIRGs). Interestingly, they have large Lyα equivalent widths ≃70-250 Å. If these four are excluded, our sample has a weak anticorrelation between Lyα equivalent width and Mstar. We compare the stellar masses and the specific SFRs (sSFRs) of LAEs with those of Lyman-break galaxies (LBGs), distant red galaxies, submillimetre galaxies, and I- or K-selected galaxies with photometric redshifts of zphot∼ 3. We find that the LAE population is the least massive among all the galaxy populations in question, but with relatively high sSFRs, while near-infrared (NIR)-detected LAEs have Mstarand sSFR similar to LBGs. Our reddest four LAEs have very high sSFRs in spite of large Mstar, thus occupying a unique region in the Mstar versus sSFR space.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: high-redshift - galaxies: stellar content - cosmology: observations

Nomenclature: Table 3: [OOS2010] NBNNN-A-NNNNN N=6. Tables 3-4: [OOS2010] RN (Nos R1-R4).

Simbad objects: 35

goto Full paper

goto View the references in ADS

Number of rows : 35
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 IC 1623 IG 01 07 47.2 -17 30 25   15       ~ 269 1
2 ZW III 35 Sy2 01 44 30.516 +17 06 09.18   15.24 14.81     ~ 229 0
3 HSCS J021640-050129 EmG 02 16 40.680 -05 01 29.53       24.6   ~ 3 0
4 [OOS2010] NB570-N-32295 EmG 02 17 25.630 -04 44 33.57       27.1   ~ 1 0
5 [OSA2008] NB503-N-42377 EmG 02 17 42.495 -04 41 08.65       23.8   ~ 2 0
6 HSCS J021745-052735 EmG 02 17 45.392 -05 27 35.55       24.9   ~ 3 0
7 NAME SXDSF reg 02 18 00 -05 00.0           ~ 197 1
8 [OSA2008] NB503-S-45244 EmG 02 18 26.122 -05 29 45.19       24.6   ~ 2 0
9 [OSA2008] NB503-S-94275 EmG 02 18 41.259 -05 18 49.79       24.3   ~ 2 0
10 [OOS2010] NB503-N-21105 EmG 02 18 42.186 -04 46 38.54       26.2   ~ 1 0
11 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 654 0
12 UGC 2369 PaG 02 54 00.9 +14 58 31   14.6       ~ 108 1
13 UGC 2369 S GiP 02 54 01.80 +14 58 14.0           ~ 98 1
14 NAME GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1133 1
15 ALESS J033229.29-275619.7 QSO 03 32 29.2912 -27 56 19.465     26.76 25.82 25.1655 ~ 103 0
16 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 662 0
17 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1384 0
18 UGC 4881 IG 09 15 55.5 +44 19 58   14.9       ~ 161 0
19 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5470 6
20 COSMOS 2328516 G 10 00 54.52 +02 34 35.2   27.842       ~ 21 0
21 NVSS J102000+081335 rG 10 20 00.204 +08 13 33.78   17.5       ~ 146 1
22 2XMM J105918.1+243234 LIN 10 59 18.128 +24 32 34.74   15.7       ~ 244 1
23 APG 148 IG 11 03 53.892 +40 50 59.89   14.29       ~ 162 1
24 IC 2810 AGN 11 25 45.055 +14 40 35.98   15.4       ~ 110 0
25 NGC 3690 IG 11 28 31.326 +58 33 41.80   13.19 12.86     ~ 911 4
26 LEDA 39024 LIN 12 13 46.107 +02 48 41.50           ~ 317 1
27 NAME GOODS-N Field reg 12 36 55.0 +62 14 15           ~ 979 1
28 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1843 3
29 IC 883 SBG 13 20 35.380 +34 08 21.84   14.8       ~ 378 1
30 NAME MS 1512-cB58 AGN 15 14 22.2751 +36 36 25.674     20.64   20.35 ~ 318 0
31 NAME IRAS F15163+4255 NW LIN 15 18 06.138 +42 44 45.03   15.0 15     ~ 190 1
32 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1829 0
33 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2758 4
34 SSA 22 reg 22 17 34.7 +00 15 07           ~ 285 0
35 IC 5298 Sy2 23 16 00.6756811155 +25 33 24.081139422   15.0       ~ 178 0

To bookmark this query, right click on this link: simbad:objects in 2010MNRAS.402.1580O and select 'bookmark this link' or equivalent in the popup menu


2021.07.31-07:53:01

© Université de Strasbourg/CNRS

    • Contact