Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Connecting GRBs and ULIRGs: A sensitive, unbiased survey for radio emission from gamma-ray burst host galaxies at 0 < z < 2.5

Perley, DA and Perley, RA and Hjorth, J and Michałowski, MJ and Cenko, SB and Jakobsson, P and Krühler, T and Levan, AJ and Malesani, D and Tanvir, NR (2015) Connecting GRBs and ULIRGs: A sensitive, unbiased survey for radio emission from gamma-ray burst host galaxies at 0 < z < 2.5. The Astrophysical Journal, 801 (2). ISSN 1538-4357

[img] Text
Perley_2015_ApJ_801_102.pdf - Published Version

Download (2MB)

Abstract

Luminous infrared galaxies and submillimeter galaxies contribute significantly to stellar mass assembly and provide an important test of the connection between the gamma-ray burst (GRB) rate and that of overall cosmic star formation. We present sensitive 3 GHz radio observations using the Karl G. Jansky Very Large Array of 32 uniformly selected GRB host galaxies spanning a redshift range from 0 < z < 2.5, providing the first fully dust- and sample-unbiased measurement of the fraction of GRBs originating from the universe's most bolometrically luminous galaxies. Four galaxies are detected, with inferred radio star formation rates (SFRs) ranging between 50 and 300 M ⊙ yr-1. Three of the four detections correspond to events consistent with being optically obscured "dark" bursts. Our overall detection fraction implies that between 9% and 23% of GRBs between 0.5 < z < 2.5 occur in galaxies with S 3GHz > 10 μJy, corresponding to SFR > 50 M ⊙ yr-1 at z 1 or >250 M ⊙ yr-1 at z 2. Similar galaxies contribute approximately 10%-30% of all cosmic star formation, so our results are consistent with a GRB rate that is not strongly biased with respect to the total SFR of a galaxy. However, all four radio-detected hosts have stellar masses significantly lower than IR/submillimeter-selected field galaxies of similar luminosities. We suggest that the GRB rate may be suppressed in metal-rich environments but independently enhanced in intense starbursts, producing a strong efficiency dependence on mass but little net dependence on bulk galaxy SFR. © 2015. The American Astronomical Society. All rights reserved.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences, 0305 Organic Chemistry, 0306 Physical Chemistry (Incl. Structural)
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
Date Deposited: 22 Feb 2017 09:19
Last Modified: 07 Sep 2017 13:20
DOI or Identification number: 10.1088/0004-637X/801/2/102
URI: http://researchonline.ljmu.ac.uk/id/eprint/5694

Actions (login required)

View Item View Item