2003A&A...406L..63F


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST05:43:23

2003A&A...406L..63F - Astronomy and Astrophysics, volume 406, L63-66 (2003/8-2)

On the Lyα emission from gamma-ray burst host galaxies: Evidence for low metallicities.

FYNBO J.P.U., JAKOBSSON P., MOLLER P., HJORTH J., THOMSEN B., ANDERSEN M.I., FRUCHTER A.S., GOROSABEL J., HOLLAND S.T., LEDOUX C., PEDERSEN H., RHOADS J., WEIDINGER M. and WIJERS R.A.M.J.

Abstract (from CDS):

We report on the results of a search for Lyα emission from the host galaxy of the z=2.140 GRB 011211 and other galaxies in its surrounding field. We detect Lyα emission from the host as well as from six other galaxies in the field. The restframe equivalent width of the Lyα line from the GRB 011211 host is about 21Å. This is the fifth detection of Lyα emission out of five possible detections from GRB host galaxies, strongly indicating that GRB hosts, at least at high redshifts, are Lyα emitters. This is intriguing as only ∼25% of the Lyman-Break selected galaxies at similar redshifts have Lyα emission lines with restframe equivalent width larger than 20Å. Possible explanations are i) a preference for GRB progenitors to be metal-poor as expected in the collapsar model, ii) an optical afterglow selection bias against dusty hosts, and iii) a higher fraction of Lyα emitters at the faint end of the luminosity function for high-z galaxies. Of these, the current evidence seems to favour i).

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - galaxies: high redshift - techniques: photometric

Nomenclature: Table 1: [FJM2003] S1211-N (Nos 1-7).

Simbad objects: 16

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Number of rows : 16

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 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 516 1
2 CD-32 5613 WD* 08 41 32.4293043356 -32 56 32.916852010   12.07 11.85 12.3   DA5.5 266 0
3 GD 108 HS* 10 00 47.2462037648 -07 33 30.777365253 12.406 13.349 13.563 13.662 13.781 sdB 129 1
4 GRB 030323 gB 11 06 09.4 -21 46 13           ~ 126 1
5 GRB 011211 gB 11 15 16 -21 56.0           ~ 287 1
6 [FJM2003] S1211-6 G 11 15 17.98 -21 56 56.2           ~ 16 1
7 GRB 971214 gB 11 56 26.4 +65 12 01           ~ 434 1
8 GRB 000301C gB 16 20 18.5 +29 26 35           ~ 341 2
9 GRB 000926 gB 17 04 15 +51 46.0           ~ 342 2
10 CD-44 12736 PM* 18 36 25.9487430436 -44 18 36.919462094   10.83 10.22     G0 196 0
11 [FJM2003] S1211-7 EmO ~ ~           ~ 1 0
12 [FJM2003] S1211-5 EmO ~ ~           ~ 1 0
13 [FJM2003] S1211-3 EmO ~ ~           ~ 1 0
14 [FJM2003] S1211-4 EmO ~ ~           ~ 1 0
15 [FJM2003] S1211-2 EmO ~ ~           ~ 1 0
16 [FJM2003] S1211-1 EmO ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.10.24-05:43:23

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