2009A&A...497..689G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.06CEST23:15:11

2009A&A...497..689G - Astronomy and Astrophysics, volume 497, 689-702 (2009/4-3)

The building the bridge survey for z = 3 Lyα emitting galaxies. II. Completion of the survey.

GROVE L.F., FYNBO J.P.U., LEDOUX C., LIMOUSIN M., MOLLER P., NILSSON K.K. and THOMSEN B.

Abstract (from CDS):

We have substantial information about the kinematics and abundances of galaxies at z≃3 studied in absorption against the light of background QSOs. At the same time we have already studied 1000s of galaxies detected in emission mainly through the Lyman-break selection technique; however, we know very little about how to make the connection between the two data sets. We aim at bridging the gap between absorption-selected and emission-selected galaxies at z≃3 by probing the faint end of the luminosity function of star-forming galaxies at z≃3. Narrow-band surveys for Lyman-α (Lyα) emitters have proven to be an efficient probe of faint, star-forming galaxies in the high-redshift universe. We performed narrow-band imaging in three fields with intervening QSO absorbers (a damped Lyα absorber and two Lyman-limit systems) using the VLT. We target Lyα at redshifts 2.85, 3.15, and 3.20. We find a consistent surface density of about 10 Lyα-emitters per square arcmin per unit redshift in all three fields down to our detection limit of about 3x1041erg/s. The luminosity function is consistent with what has been found by other surveys at similar redshifts. About 85% of the sources are fainter than the canonical limit of R=25.5 for most Lyman-break galaxy surveys. In none of the three fields do we detect the emission counterparts of the QSO absorbers. In particular we do not detect the counterpart of the z=2.85 damped Lyα absorber towards Q2138-4427. This implies that the DLA galaxy is either not a Lyα emitter or is fainter than our flux limit. Narrow-band surveys for Lyα emitters are excellent for probing the faint end of the luminosity function at z≃3. There is a very high surface density of this class of objects; yet, we only detect galaxies with Lyα in emission, so the density of galaxies with similar broad band magnitudes will be substantially higher. This is consistent with a very steep slope of the faint end of the luminosity function as has been inferred by other studies. This faint population of galaxies is playing a central role in the early Universe. There is evidence that this popualtion is dominating the intergrated star-formation activity, responsible for the bulk of the ionising photons at z>3 and likely also responsible for the bulk of the enrichment of the intergalactic medium.

Abstract Copyright:

Journal keyword(s): cosmology: observations - galaxies: quasars: individual: BRI1346 - galaxies: quasars: individual: BRI1202-0725 - galaxies: quasars: individual: Q2138-4427 - galaxies: high-redshift

Nomenclature: Tables A.1, A.4: LEGO 1202-NN (Nos 1-25). Tables A.2, A.4: LEGO 1346-NN N=24 among (Nos 1-26). Tables A.3, A.4: LEGO 2138-NN N=34 among (Nos 1-35).

Simbad objects: 90

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Number of rows : 90

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 GD 71 WD* 05 52 27.6197286025 +15 53 13.228639956 11.675 12.783 13.032 13.169 13.337 DA1.5 334 0
2 GRB 020124 gB 09 32 50.8 -11 31 11           ~ 142 2
3 GRB 030323 gB 11 06 09.4 -21 46 13           ~ 125 1
4 LEGO 1202- 5 EmG 12 05 10.4 -07 45 40     24.62 25.07   ~ 1 0
5 LEGO 1202-17 G 12 05 10.6 -07 41 30           ~ 1 0
6 LEGO 1202-14 EmG 12 05 12.4 -07 40 48           ~ 1 0
7 LEGO 1202-16 EmG 12 05 13.8 -07 42 09           ~ 1 0
8 LEGO 1202- 2 EmG 12 05 14.0 -07 40 05     25.05 24.98   ~ 1 0
9 LEGO 1202- 3 EmG 12 05 14.4 -07 42 40     23.43 23.63   ~ 1 0
10 LEGO 1202- 4 EmG 12 05 14.5 -07 40 10     27.36 27.81   ~ 1 0
11 LEGO 1202-18 EmG 12 05 15.1 -07 44 20           ~ 1 0
12 LEGO 1202- 8 EmG 12 05 18.2 -07 42 12     26.93     ~ 1 0
13 LEGO 1202-11 EmG 12 05 18.2 -07 42 09     24.37 24.66   ~ 1 0
14 LEGO 1202-21 EmG 12 05 18.6 -07 43 44     27.56 26.25   ~ 1 0
15 LEGO 1202-13 EmG 12 05 18.6 -07 43 44     26.77 27.57   ~ 1 0
16 LEGO 1202-22 EmG 12 05 19.1 -07 42 31     27.86 28.17   ~ 1 0
17 LEGO 1202-24 G 12 05 21.0 -07 45 01       26.76   ~ 1 0
18 LEGO 1202-19 EmG 12 05 22.5 -07 44 08           ~ 1 0
19 QSO B1202-074 QSO 12 05 23.12 -07 42 32.4     17.5     ~ 349 5
20 LEGO 1202-10 EmG 12 05 23.7 -07 43 44     26.61 26.28   ~ 1 0
21 LEGO 1202-23 EmG 12 05 24.1 -07 44 01           ~ 1 0
22 LEGO 1202- 9 EmG 12 05 25.3 -07 42 13     26.45 26.39   ~ 1 0
23 LEGO 1202- 7 EmG 12 05 27.4 -07 40 38     25.92 26.21   ~ 1 0
24 LEGO 1202-12 G 12 05 27.7 -07 42 38       26.47   ~ 1 0
25 LEGO 1202-25 G 12 05 28.3 -07 40 54       27.46   ~ 1 0
26 LEGO 1202- 6 G 12 05 31.2 -07 42 48       27.30   ~ 1 0
27 LEGO 1202-15 EmG 12 05 31.3 -07 41 42     27.68 28.12   ~ 1 0
28 LEGO 1202- 1 G 12 05 31.5 -07 41 16       26.26   ~ 1 0
29 LEGO 1202-30 G 12 05 31.9 -07 41 30       28.63   ~ 1 0
30 LEGO 1346-12 EmG 13 49 04.6 -03 36 35   26.53   25.70   ~ 2 0
31 LEGO 1346-14 EmG 13 49 05.7 -03 35 03   25.29   24.83   ~ 2 0
32 LEGO 1346-24 EmG 13 49 06.7 -03 36 32   26.55   26.05   ~ 2 0
33 LEGO 1346-10 EmG 13 49 09.5 -03 38 13   26.97   26.91   ~ 2 0
34 LEGO 1346- 9 G 13 49 10.5 -03 38 21       24.39   ~ 1 0
35 LEGO 1346- 7 EmG 13 49 12.2 -03 39 51   25.40   24.69   ~ 2 0
36 LEGO 1346- 2 EmG 13 49 13.7 -03 40 06           ~ 2 0
37 LEGO 1346-21 EmG 13 49 14.3 -03 36 08       25.47   ~ 2 0
38 LEGO 1346-17 EmG 13 49 14.5 -03 35 26   24.22   23.31   ~ 2 0
39 LEGO 1346- 5 EmG 13 49 15.7 -03 39 37   27.39       ~ 2 0
40 LEGO 1346- 8 EmG 13 49 16.4 -03 38 32           ~ 2 0
41 QSO B1346-033 QSO 13 49 16.658 -03 37 15.69   21.23 19.91     ~ 36 0
42 LEGO 1346-25 EmG 13 49 16.9 -03 36 36           ~ 2 0
43 LEGO 1346-23 EmG 13 49 17.7 -03 36 33       26.48   ~ 2 0
44 LEGO 1346- 1 EmG 13 49 19.4 -03 40 30   26.60       ~ 2 0
45 LEGO 1346-26 G 13 49 19.4 -03 37 01       25.20   ~ 1 0
46 LEGO 1346-20 EmG 13 49 20.0 -03 35 52           ~ 2 0
47 LEGO 1346- 6 EmG 13 49 20.4 -03 39 01       25.55   ~ 2 0
48 LEGO 1346-22 EmG 13 49 21.5 -03 36 09   27.09   24.61   ~ 2 0
49 LEGO 1346- 3 EmG 13 49 26.0 -03 39 41           ~ 2 0
50 LEGO 1346-13 G 13 49 26.4 -03 34 02       25.98   ~ 1 0
51 LEGO 1346-11 G 13 49 27.3 -03 33 58           ~ 1 0
52 LEGO 1346- 4 EmG 13 49 27.7 -03 39 40           ~ 2 0
53 LEGO 1346-18 G 13 49 29.20 -03 35 31.2       24.57   ~ 1 0
54 LEGO 1346-15 G 13 49 29.4 -03 35 08       24.60   ~ 1 0
55 CD-38 10980 WD* 16 23 33.8384178546 -39 13 46.160032569 9.916 10.885 11.029 10.936 10.841 DA2 439 1
56 LEGO 2138-11 EmG 21 41 03.7 -44 14 16   25.80   24.06   ~ 2 0
57 LEGO 2138-18 EmG 21 41 14.7 -44 11 23   27.88   25.24   ~ 2 0
58 LEGO 2138-26 EmG 21 41 43.3 -44 11 25   27.93   25.98   ~ 2 0
59 LEGO 2138-21 EmG 21 41 44.0 -44 10 59           ~ 1 0
60 LEGO 2138- 1 G 21 41 44.6 -44 16 07       25.44   ~ 1 0
61 LEGO 2138- 3 G 21 41 46.2 -44 15 38       25.32   ~ 1 0
62 LEGO 2138-33 EmG 21 41 47.5 -44 13 14   27.25   25.92   ~ 2 0
63 LEGO 2138-27 EmG 21 41 48.1 -44 11 19           ~ 2 0
64 LEGO 2138-14 EmG 21 41 49.0 -44 13 46   25.33   25.99   ~ 2 0
65 LEGO 2138-32 EmG 21 41 49.1 -44 13 05   25.93   26.04   ~ 2 0
66 LEGO 2138-25 EmG 21 41 49.1 -44 11 13   27.02       ~ 2 0
67 LEGO 2138-29 EmG 21 41 49.2 -44 11 48   24.48   24.04   ~ 2 0
68 LEGO 2138-23 EmG 21 41 51.4 -44 11 03   27.67   27.43   ~ 2 0
69 LEGO 2138- 2 G 21 41 53.0 -44 15 42       24.71   ~ 1 0
70 LEGO 2138-10 EmG 21 41 54.4 -44 14 22           ~ 2 0
71 LEGO 2138- 8 EmG 21 41 56.2 -44 15 10   28.04   26.30   ~ 2 0
72 LEGO 2138-20 EmG 21 41 58.0 -44 10 41           ~ 2 0
73 LEGO 2138-16 EmG 21 41 58.9 -44 10 10   26.57   26.43   ~ 2 0
74 LEGO 2138-30 EmG 21 41 59.2 -44 11 53           ~ 2 0
75 LEGO 2138-36 EmG 21 41 59.3 -44 13 18           ~ 2 0
76 LBQS 2138-4427 QSO 21 41 59.5010115549 -44 13 25.925906956   19.17 18.20     ~ 60 1
77 LEGO 2138-12 EmG 21 42 01.9 -44 13 52   26.76   27.02   ~ 2 0
78 LEGO 2138-31 EmG 21 42 08.1 -44 12 01   27.27   26.64   ~ 2 0
79 LEGO 2138- 9 G 21 42 10.5 -44 14 38       25.72   ~ 1 0
80 LEGO 2138-22 EmG 21 42 11.1 -44 11 05           ~ 2 0
81 LEGO 2138- 5 G 21 42 12.1 -44 15 32       26.41   ~ 1 0
82 LEGO 2138- 4 EmG 21 42 12.6 -44 15 34   27.21   25.53   ~ 2 0
83 LEGO 2138- 7 G 21 42 12.6 -44 15 11       25.57   ~ 1 0
84 LEGO 2138-34 G 21 42 12.6 -44 11 36       25.71   ~ 1 0
85 LEGO 2138-35 G 21 42 12.6 -44 10 10       26.26   ~ 1 0
86 LEGO 2138-15 G 21 42 12.9 -44 13 35       26.03   ~ 1 0
87 LEGO 2138- 6 G 21 42 14.8 -44 15 15       26.08   ~ 1 0
88 LEGO 2138-19 EmG 21 42 14.9 -44 10 45   27.44       ~ 2 0
89 LEGO 2138-13 G 21 42 15.5 -44 13 51       26.16   ~ 1 0
90 LEGO 2138-17 EmG 21 42 15.5 -44 11 40   27.17   25.56   ~ 2 0

    Equat.    Gal    SGal    Ecl

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2020.07.06-23:15:11

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