2007ApJ...671..628T


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.16CEST20:55:08

2007ApJ...671..628T - Astrophys. J., 671, 628-636 (2007/December-2)

ISM studies of GRB 030329 with high-resolution spectroscopy.

THONE C.C., GREINER J., SAVAGLIO S. and JEHIN E.

Abstract (from CDS):

We present early Very Large Telescope UV-Visual Echelle Spectrograph (VLT UVES) high-resolution spectra of the afterglow of GRB 030329 at redshift z=0.16867±0.00001. In contrast to other spectra from this burst, both emission and absorption lines were detected. None of them showed any temporal evolution. From the emission lines, we determine the properties of the host galaxy, which has a star formation rate (SFR) of 0.198 M/yr and a low metallicity of 0.17 Z. Given the low total stellar host mass logM*=7.75±0.15 M and an absolute luminosity mB=-16.29, we derive specific SFRs (SSFR) of logSFR=-8.5/yr and SFR = 15.1 M/yr/L*. This fits well into the picture of GRB hosts as being low-mass, low-metallicity, actively star-forming galaxies. The Mg II and Mg I absorption lines from the host show multiple narrow (Doppler width b=5-12 km/s) components spanning a range of v∼230 km/s, mainly blueshifted compared to the redshift from the emission lines. These components are likely probing outflowing material of the host galaxy, which could arise from former galactic superwinds, driven by supernovae from star-forming regions. Similar features have been observed in QSO spectra. The outflowing material has high column densities of logN_MgII_=13.99±0.04/cm2 and logN_MgI_=12.39±0.04/cm2 and the nonvariability of the column densities implies a distance of at least 560 pc from the burst, further supporting an outflow scenario.

Abstract Copyright:

Journal keyword(s): Gamma Rays: Bursts - Galaxies: Quasars: Absorption Lines

Simbad objects: 19

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Number of rows : 19

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 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 519 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9793 1
3 SN 2006aj SN* 03 21 39.670 +16 52 02.27 17.96 19.11 17.40     SNIc-BL 850 1
4 GRB 970508 gB 06 53 49.2 +79 16 19           ~ 848 1
5 GRB 050505 gB 09 27 03.300 +30 16 23.70     20.74     ~ 175 0
6 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5453 6
7 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1136 1
8 GRB 030226 gB 11 33 04.9 +25 53 56           ~ 190 0
9 GRB 990506 gB 11 54 41 -26 45.0           ~ 159 1
10 GRB 000418 gB 12 25 21 +20 05.0           ~ 202 0
11 GRB 020405 gB 13 58 03.12 -31 22 22.2   21.9 21.5     ~ 239 1
12 GRB 050730 gB 14 08 17.090 -03 46 18.90   20.32 17.68     ~ 288 0
13 GRB 060418 gB 15 45 42.600 -03 38 20.00 15.73 16.19 14.98     ~ 330 0
14 GRB 020813A gB 19 46 41.874 -19 36 04.81           ~ 288 0
15 GRB 050922C gB 21 09 33.000 -08 45 30.10 15.15 15.86 14.69     ~ 257 0
16 GRB 060607 gB 21 58 50.400 -22 29 46.70 18.49 16.67 15.09     ~ 266 0
17 GRB 050820A gB 22 29 38.110 +19 33 37.10 18.33 19.00 18.47     ~ 345 0
18 GRB 990712 gB 22 31 53.061 -73 24 28.58           ~ 253 1
19 GRB 051111A gB 23 12 33.170 +18 22 28.80 19.77 20.08 19.50     ~ 189 0

    Equat.    Gal    SGal    Ecl

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