2009A&A...508L..21N


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET20:27:37

2009A&A...508L..21N - Astronomy and Astrophysics, volume 508, L21-25 (2009/12-3)

Lyα emitters: blue dwarfs or supermassive ULIRGs? evidence for a transition with redshift.

NILSSON K.K. and MOLLER P.

Abstract (from CDS):

The traditional view that Lyα emission and dust should be mutually exclusive has been questioned more and more often; most notably, the observations of Lyα emission from ULIRGs seem to counter this view. In this paper we seek to address the reverse question. How large a fraction of Lyα selected galaxies are ULIRGs? Using two samples of 24/25 Lyα emitting galaxies at z=0.3/2.3, we perform this test, including results at z=3.1, and find that, whereas the ULIRG fraction at z=3.1 is very small, it systematically increases towards lower redshifts. There is a hint that this evolution may be quite sudden and that it happens around a redshift of z∼2.5. After measuring the infrared luminosities of the Lyα emitters, we find that they are in the normal to ULIRG range in the lower redshift sample, while the higher redshift galaxies all have luminosities in the ULIRG category. The Lyα escape fractions for these infrared bright galaxies are in the range 1-100% in the z=0.3 galaxies, but are very low in the z=2.3 galaxies, 0.4% on average. The unobscured star formation rates are very high, ranging from 500 to more than 5000M/yr, and the dust attenuation derived are in the range 0.0<AV<3.5.

Abstract Copyright:

Journal keyword(s): cosmology: observations - galaxies: high - redshift

Simbad objects: 51

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Number of rows : 51

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 [DSB2008] 23425 EmG 00 37 29.1 -43 38 08           ~ 4 0
2 [DSB2008] 23257 EmG 00 37 54.0 -43 38 28           ~ 3 0
3 [DSB2008] 16998 EmG 00 38 04.930 -43 52 28.50           ~ 5 0
4 [CBH2010] 009.559041-44.243584 AGN 00 38 14.2 -44 14 37           ~ 4 0
5 [DSB2008] 13715 EmG 00 38 33.2 -44 00 32           ~ 2 0
6 [DSB2008] 21062 EmG 00 38 39.9 -43 43 21           ~ 4 0
7 2MASX J00393212-4411305 G 00 39 32.1636564767 -44 11 30.404216320           ~ 10 0
8 [DSB2008] 16921 EmG 00 41 05.6 -43 52 29           ~ 4 0
9 [DSB2008] 3801 EmG 03 30 56.87 -28 16 47.8           ~ 7 0
10 [CBH2010] 052.760120-27.858473 EmG 03 31 02.429 -27 51 30.50           ~ 4 0
11 2dFGRS TGS322Z059 G 03 31 34.68 -28 20 23.0   19.298   18.687   ~ 5 0
12 [CBH2010] 052.962204-28.188999 EmG 03 31 50.929 -28 11 20.40           ~ 9 0
13 [CBH2010] 052.976501-28.238640 EmG 03 31 54.360 -28 14 19.10           ~ 6 0
14 [DSB2008] 7100 EmG 03 31 59.87 -28 09 53.0           ~ 6 0
15 [CBH2010] 053.061584-28.186527 EmG 03 32 14.780 -28 11 11.50           ~ 4 0
16 [CBH2010] 053.077999-28.222332 SyG 03 32 18.74 -28 13 21.2   20.05   18.99   ~ 7 0
17 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 644 0
18 CXOCDFS J033256.8-275318 QSO 03 32 56.6595 -27 53 16.498 20.82 20.5562   19.874 20.2611 ~ 45 0
19 [DSB2008] 1348 EmG 03 32 57.65 -28 23 18.4           ~ 7 0
20 [CBH2010] 053.258461-28.357668 EmG 03 33 02.031 -28 21 27.60           ~ 5 0
21 LEDA 750493 GiC 03 33 07.24 -27 44 31.2       17.66   ~ 32 0
22 [CBH2010] 053.359249-27.454334 EmG 03 33 26.220 -27 27 15.60           ~ 5 0
23 [CBH2010] 053.541294-28.255499 EmG 03 34 09.911 -28 15 19.80           ~ 4 0
24 SWIRE J033450.70-274346.1 EmG 03 34 50.7020752690 -27 43 45.906962682           ~ 5 0
25 SWIRE J033455.08-274803.6 EmG 03 34 55.1004277530 -27 48 03.628850409           ~ 5 0
26 [NTM2009] LAE COSMOS 96 EmG 09 59 22.65 +02 08 02.0           ~ 2 0
27 [ICS2009] 1048642 EmG 09 59 23.13 +02 15 24.2 25.85 25.62 25.02 24.86 24.65 ~ 10 0
28 [NTM2009] LAE COSMOS 152 EmG 09 59 27.29 +02 20 14.5 24.56 24.23 23.35 22.91 22.48 ~ 5 0
29 UVISTADR1 J095928.11+020745.8 EmG 09 59 28.12 +02 07 45.9 25.76 26.15 25.63 25.65 25.42 ~ 4 0
30 ACS-GC 20125365 AGN 09 59 28.971 +02 25 02.22   23.084 23.014   22.40 ~ 24 0
31 [VV2006] J095929.2+022033 QSO 09 59 29.24 +02 20 34.4   21.899 22.038   21.86 ~ 31 0
32 2XMM J095934.7+021028 AGN 09 59 34.755 +02 10 28.07 22.837 23.16 22.58 22.18 22.059 ~ 33 0
33 [SON2014] COSMOS3B 38380 EmG 09 59 40.93 +02 23 04.2 24.63 24.77 24.61 24.62 24.50 ~ 6 0
34 [SON2014] COSMOS3B 43982 EmG 09 59 54.390 +02 26 29.96 24.74 24.97 24.38 24.27 23.91 ~ 9 0
35 COSMOS 1302712 QSO 09 59 58.868 +02 00 23.87   22.784 22.585   21.81 ~ 20 0
36 ACS-GC 20123811 EmG 10 00 02.57 +02 19 58.8 25.29 25.28 24.83 24.54 24.04 ~ 23 0
37 [NTM2009] LAE COSMOS 162 EmG 10 00 04.84 +02 22 26.3           ~ 2 0
38 UVISTADR1 J100014.19+022801.1 EmG 10 00 14.20 +02 28 01.2 24.24 24.36 24.17 24.04 24.01 ~ 4 0
39 ACS-GC 20118640 EmG 10 00 16.45 +02 24 34.0 24.78 24.37 23.56 23.12 22.328 ~ 7 0
40 COSMOS2015 445448 EmG 10 00 26.64 +01 58 23.1 23.857 24.24 24.07 24.16 23.97 ~ 12 0
41 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2202 0
42 ACS-GC 20121134 AGN 10 00 31.93 +02 18 11.8   23.984 24.079   23.587 ~ 29 0
43 COSMOS2015 681237 QSO 10 00 38.826 +02 19 56.47   25.241 24.675   23.423 ~ 22 0
44 COSMOS2015 483880 EmG 10 00 44.21 +02 02 06.8 25.01 24.87 24.32 24.17 24.01 ~ 12 0
45 COSMOS2015 462238 EmG 10 00 55.37 +01 59 55.4 23.353 23.48 23.20 23.27 23.11 ~ 13 0
46 COSMOS 1594973 EmG 10 00 57.33 +02 08 39.2 25.20 25.09 24.87 24.67 23.86 ~ 6 0
47 COSMOS2015 629991 EmG 10 01 02.95 +02 15 22.8   24.548 24.288     ~ 10 0
48 COSMOS2015 623908 QSO 10 01 23.9773112203 +02 14 45.921094021   22.532 22.148   21.739 ~ 26 0
49 2XMM J100130.7+021147 AGN 10 01 30.772 +02 11 46.82   22.950 23.049   22.264 ~ 27 0
50 UVISTADR1 J100132.24+022540.9 EmG 10 01 32.24 +02 25 41.1 24.64 24.85 24.62 24.50 24.23 ~ 4 0
51 UVISTADR1 J100133.01+022557.0 EmG 10 01 33.01 +02 25 57.2 25.11 25.33 24.79 24.62 24.22 ~ 4 0

    Equat.    Gal    SGal    Ecl

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