2001A&A...372..438S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST10:29:19

2001A&A...372..438S - Astronomy and Astrophysics, volume 372, 438-455 (2001/6-3)

Host galaxies of gamma-ray bursts: Spectral energy distributions and internal extinction.

SOKOLOV V.V., FATKHULLIN T.A., CASTRO-TIRADO A.J., FRUCHTER A.S., KOMAROVA V.N., KASIMOVA E.R., DODONOV S.N., AFANASIEV V.L. and MOISEEV A.V.

Abstract (from CDS):

We present BVRcIc broad-band flux spectra for the host galaxies of GRB 970508, GRB 980613, GRB 980703, GRB 990123 and GRB 991208 obtained with the 6-m telescope of SAO RAS. The comparison of the broad-band flux spectra of these host galaxies with the template spectral energy distributions (SEDs) of local starburst galaxies of different morphological types shows that the BVRcIc of the hosts are best fitted by the spectral properties of template SEDs of starburst galaxies and that there is a significant internal extinction in these host galaxies. We derived the absolute magnitudes of the GRB host galaxies making use of SEDs for the starburst galaxies. To create theoretical templates we performed the population synthesis modeling of the continuum spectral energy distribution of the host galaxies of GRB 970508 and GRB 980703 using different extinction laws (Cardelli et al., 1989ApJ...345..245C and Calzetti et al., 2000ApJ...533..682C) and assuming burst and exponential scenarios of star formation. The comparison of BVRcIc broad-band flux spectra with the local starburst galaxies templates and theoretical templates as well as direct estimates (using Balmer emission lines) of the internal extinction shows that it is likely to be of great importance to take into account effects of the internal extinction in the host galaxies. From the energy distribution in the spectrum of the host galaxy of GRB 991208 and from the intensity of their spectral lines (with allowance for the effects of internal extinction) it follows that this is a GRB galaxy with the highest massive star-formation rate of all known GRB galaxies - up to hundreds of solar masses per year. The reduced luminosity of these dusty galaxies (e.g. for the host of GRB 970508 AV∼2mag, for the host of GRB 980703 AV∼0.6mag and for the host of GRB 991208 AV∼2mag) could explain the observational fact (it results independently from our BVRcIc photometry and from calculated spectral distribution for the subset of galaxies having been observed with the 6-m telescope): none of the observed GRB host galaxies with known distances is brighter than the local galaxies with the luminosity L* (where L* is the ``knee" of the local luminosity function).

Abstract Copyright:

Journal keyword(s): galaxies: starburst - galaxies: photometry - cosmology: observations - gamma rays: bursts - ISM: dust, extintion

Simbad objects: 14

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Number of rows : 14

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 970228 gB 05 01 46.7 +11 46 53           ~ 625 1
2 GRB 991216 gB 05 09 31.2983 +11 17 07.262           ~ 406 1
3 GRB 000131 gB 06 13 31.08 -51 56 41.7     24.7     ~ 161 1
4 GRB 970508 gB 06 53 49.2 +79 16 19           ~ 840 1
5 GRB 980613 gB 10 17 57.8 +71 27 26           ~ 198 1
6 GRB 971214 gB 11 56 26.4 +65 12 01           ~ 434 1
7 GRB 000418 gB 12 25 21 +20 05.0           ~ 201 0
8 GRB 990510 gB 13 38 07.64 -80 29 48.8           ~ 465 1
9 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 963 1
10 GRB 000301C gB 16 20 18.5 +29 26 35           ~ 340 2
11 GRB 991208 gB 16 33 53.51 +46 27 21.5           ~ 243 1
12 GRB 000926 gB 17 04 15 +51 46.0           ~ 341 2
13 GRB 990712 gB 22 31 53.061 -73 24 28.58           ~ 250 1
14 GRB 980703 gB 23 59 06.7 +08 35 07           ~ 421 1

    Equat.    Gal    SGal    Ecl

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2020.07.05-10:29:19

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