2012A&A...542A.103B


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET18:32:46

2012A&A...542A.103B - Astronomy and Astrophysics, volume 542A, 103-103 (2012/6-1)

Constraining the nature of the most distant gamma-ray burst host galaxies.

BASA S., CUBY J.G., SAVAGLIO S., BOISSIER S., CLEMENT B., FLORES H., LE BORGNE D. and MAZURE A.

Abstract (from CDS):

Long duration gamma-ray bursts (GRBs) allow us to explore the distant Universe, and are potentially the most effective tracer of the most distant objects. Our current knowledge of the properties of GRB host galaxies at redshifts >5 is very scarce. We propose to improve this situation by obtaining more observations of high-redshift hosts to better understand their properties and help enable us to use GRBs as probes of the high-redshift universe. We performed very deep photometric observations of three high-redshift GRB host galaxies, GRB 080913 at z=6.7, GRB 060927 at z=5.5 and GRB 060522 at z=5.1. Our FORS2 and HAWK-I observations at the Very Large Telescope (VLT) targeted the rest-frame ultraviolet continuum of these galaxies, allowing us to constrain their star formation rates (SFRs). In addition, we completed deep spectroscopic observations of the GRB 080913 host galaxy with X-Shooter at the VLT to search for Ly-α emission. For the sake of the discussion, we use published results on another high-redshift GRB host, GRB 050904 at z=6.3. The sample of GRB host galaxies studied in this paper consists of four out of the five spectroscopically confirmed GRBs at z>5. Despite our presented observations being the deepest ever reported of high-redshift GRB host galaxies, we do not detect any of the hosts, neither in photometry nor in spectroscopy in the case of GRB 080913. These observations indicate that the GRB host galaxies seem to evolve with time and to have lower SFRs at z>5 than they have at z≲1. In addition, the host galaxy of GRB 080913 at z=6.7 does not show Ly-α emission. While the measured properties of the galaxies in our sample agree with the properties of the general galaxy population at z>5, our observations are not sufficiently sensitive to allow us to infer further conclusions on whether this specific population is representative of the general one. The characterization of high-redshift GRB host galaxies is a very challenging endeavor requiring a lot of telescope time, but is necessary to improve our understanding of the high-redshift universe using GRB observations.

Abstract Copyright:

Journal keyword(s): gamma-ray burst: general - galaxies: high-redshift - galaxies: fundamental parameters

Nomenclature: [BCS2012] GRB 080913 host N=1

Simbad objects: 21

goto Full paper

goto View the reference in ADS

Number of rows : 21

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           ~ 507 1
2 [MHC2003] GRB 021004 abs 2.328 ALS 00 26 54.7 +18 55 42           ~ 14 1
3 GRB 050904 gB 00 54 50.794 +14 05 09.42           ~ 424 1
4 [KKA2006] GRB 050904 abs 6.295 G 00 54 50.88 +14 05 09.9           ~ 7 1
5 [BCS2012] GRB 080913 host G 04 22 57.90 -25 07 38.6           ~ 1 0
6 GRB 080913 gB 04 22 57.90 -25 07 38.6           ~ 169 0
7 GRB 090423 gB 09 55 33.19 +18 08 57.7           ~ 304 0
8 GRB 030323 gB 11 06 09.4 -21 46 13           ~ 122 1
9 [VWR2003] GRB 030323 abs 3.372 G 11 06 09.4 -21 46 13           ~ 13 1
10 GRB 011211 gB 11 15 16 -21 56.0           ~ 282 1
11 [FJM2003] S1211-6 G 11 15 17.98 -21 56 56.2           ~ 16 1
12 GRB 030226 gB 11 33 04.9 +25 53 56           ~ 183 2
13 [GGK2003] GRB 030226 abs 1.986 ALS 11 33 04.9 +25 53 56           ~ 6 1
14 GRB 971214 gB 11 56 26.4 +65 12 01           ~ 431 1
15 [LDM2003] GRB J115626.4+651200 G 11 56 26.55 +65 12 00.7           ~ 19 1
16 GRB 030429 gB 12 13 07.495 -20 54 49.54           ~ 117 1
17 GRB 090205 gB 14 43 40.00 -27 50 51.4           ~ 66 0
18 [CDK2000] GRB 000926 abs 2.0369 G 17 04 09.8 +51 47 11           ~ 11 1
19 GRB 000926 gB 17 04 15 +51 46.0           ~ 337 2
20 GRB 060522 gB 21 31 44.850 +02 53 10.80           ~ 110 0
21 GRB 060927A gB 21 58 11.930 +05 21 50.32           ~ 168 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2012A&A...542A.103B and select 'bookmark this link' or equivalent in the popup menu


2019.11.21-18:32:46

© Université de Strasbourg/CNRS

    • Contact