2003A&A...407..147F


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET19:14:33

2003A&A...407..147F - Astronomy and Astrophysics, volume 407, 147-157 (2003/8-3)

The Building the Bridge survey for z=3 Lyα emitting galaxies. I. Method and first results.

FYNBO J.P.U., LEDOUX C., MOLLER P., THOMSEN B. and BURUD I.

Abstract (from CDS):

We present the first results of an observational programme at the ESO Very Large Telescope aimed at detecting a large sample of high-redshift galaxies fainter than the current spectroscopic limit of R=25.5 for Lyman-Break galaxies. In this paper, we describe the results of deep narrow and broad-band imaging and subsequent follow-up multi-object spectroscopy of faint high-redshift galaxies in the fields of the QSOs BRI 1346-0322 and Q2138-4427. These QSOs have intervening high neutral hydrogen column density absorbers, at redshifts z=2.85 and z=3.15 respectively, for which redshifted Lyα emission falls within less than a few Å from the central wavelengths of existing VLT (∼60Å-wide) narrow-band filters. We selected 37 and 27 candidate emission-line galaxies in the two fields respectively. Most (∼85%) of the candidates have R-band magnitudes fainter than R=25.5. The first spectroscopic follow-up of a sub-sample of the candidates resulted in 41 confirmed candidates and 4 foreground emission line galaxies (three [OII] emitters and one CIV emitter). The confirmation rate for Lyα emitters is 82% and 68% in the field of BRI 1346-0322 and Q2138-4427 respectively. In addition, we serendipitously detect a number of other emission-line sources on some of the slitlets not used for candidates. Of these, 9 are also most likely Lyα emitters with redshifts ranging from 1.98 to 3.47. The redshift distribution of confirmed candidates in the field of BRI 1346-0322 is consistent with being drawn from a uniform distribution weighted by the filter response curve, whereas the galaxies in the field of Q2138-4427 have redshifts clustering very close to the redshift of the damped Lyα absorber. This latter fact indicates the existence of a large ``pancake''-like structure confirming the earlier suggestions of Francis & Hewitt (1993AJ....105.1633F).

Abstract Copyright:

Journal keyword(s): cosmology: observations - quasars: individual: BRI 1346-0322, Q2138-4427 - galaxies: high redshift

Nomenclature: Fig.5: LEGO 1346-NN N=18 among (Nos 1-25). Fig.6: LEGO 2138-NN N=22 among (Nos 4-36).

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 - 2021
#notes
1 LEGO 1346-12 EmG 13 49 04.6 -03 36 35   26.53   25.70   ~ 2 0
2 LEGO 1346-14 EmG 13 49 05.7 -03 35 03   25.29   24.83   ~ 2 0
3 LEGO 1346-24 EmG 13 49 06.7 -03 36 32   26.55   26.05   ~ 2 0
4 LEGO 1346-10 EmG 13 49 09.5 -03 38 13   26.97   26.91   ~ 2 0
5 LEGO 1346- 7 EmG 13 49 12.2 -03 39 51   25.40   24.69   ~ 2 0
6 LEGO 1346- 2 EmG 13 49 13.7 -03 40 06           ~ 2 0
7 LEGO 1346-21 EmG 13 49 14.3 -03 36 08       25.47   ~ 2 0
8 LEGO 1346-17 EmG 13 49 14.5 -03 35 26   24.22   23.31   ~ 2 0
9 LEGO 1346- 5 EmG 13 49 15.7 -03 39 37   27.39       ~ 2 0
10 LEGO 1346- 8 EmG 13 49 16.4 -03 38 32           ~ 2 0
11 QSO B1346-033 QSO 13 49 16.658 -03 37 15.69   21.23 19.91     ~ 37 0
12 LEGO 1346-25 EmG 13 49 16.9 -03 36 36           ~ 2 0
13 LEGO 1346-23 EmG 13 49 17.7 -03 36 33       26.48   ~ 2 0
14 LEGO 1346- 1 EmG 13 49 19.4 -03 40 30   26.60       ~ 2 0
15 LEGO 1346-20 EmG 13 49 20.0 -03 35 52           ~ 2 0
16 LEGO 1346- 6 EmG 13 49 20.4 -03 39 01       25.55   ~ 2 0
17 LEGO 1346-22 EmG 13 49 21.5 -03 36 09   27.09   24.61   ~ 2 0
18 LEGO 1346- 3 EmG 13 49 26.0 -03 39 41           ~ 2 0
19 LEGO 1346- 4 EmG 13 49 27.7 -03 39 40           ~ 2 0
20 LP 916-15 PM* 15 38 59.6477173130 -28 35 36.970418054   12.19 11.62     A 107 0
21 LAWD 87 WD* 21 32 16.2327559970 +00 15 14.398335415 13.717 14.634 14.674 14.675 14.676 DB4 169 1
22 LEGO 2138-11 EmG 21 41 03.7 -44 14 16   25.80   24.06   ~ 2 0
23 LEGO 2138-18 EmG 21 41 14.7 -44 11 23   27.88   25.24   ~ 2 0
24 LEGO 2138-26 EmG 21 41 43.3 -44 11 25   27.93   25.98   ~ 2 0
25 LEGO 2138-33 EmG 21 41 47.5 -44 13 14   27.25   25.92   ~ 2 0
26 LEGO 2138-27 EmG 21 41 48.1 -44 11 19           ~ 2 0
27 LEGO 2138-14 EmG 21 41 49.0 -44 13 46   25.33   25.99   ~ 2 0
28 LEGO 2138-32 EmG 21 41 49.1 -44 13 05   25.93   26.04   ~ 2 0
29 LEGO 2138-25 EmG 21 41 49.1 -44 11 13   27.02       ~ 2 0
30 LEGO 2138-29 EmG 21 41 49.2 -44 11 48   24.48   24.04   ~ 2 0
31 LEGO 2138-23 EmG 21 41 51.4 -44 11 03   27.67   27.43   ~ 2 0
32 LEGO 2138-10 EmG 21 41 54.4 -44 14 22           ~ 2 0
33 LEGO 2138- 8 EmG 21 41 56.2 -44 15 10   28.04   26.30   ~ 2 0
34 LEGO 2138-20 EmG 21 41 58.0 -44 10 41           ~ 2 0
35 LEGO 2138-16 EmG 21 41 58.9 -44 10 10   26.57   26.43   ~ 2 0
36 LEGO 2138-30 EmG 21 41 59.2 -44 11 53           ~ 2 0
37 LEGO 2138-36 EmG 21 41 59.3 -44 13 18           ~ 2 0
38 LBQS 2138-4427 QSO 21 41 59.5010115549 -44 13 25.925906956   19.17 18.20     ~ 62 1
39 LEGO 2138-12 EmG 21 42 01.9 -44 13 52   26.76   27.02   ~ 2 0
40 LEGO 2138-31 EmG 21 42 08.1 -44 12 01   27.27   26.64   ~ 2 0
41 LEGO 2138-22 EmG 21 42 11.1 -44 11 05           ~ 2 0
42 LEGO 2138- 4 EmG 21 42 12.6 -44 15 34   27.21   25.53   ~ 2 0
43 LEGO 2138-19 EmG 21 42 14.9 -44 10 45   27.44       ~ 2 0
44 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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2021.03.02-19:14:33

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