2020
DOI: 10.3847/1538-4357/ab7992
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ALMA CO Observations of the Host Galaxies of Long-duration Gamma-Ray Bursts. I. Molecular Gas Scaling Relations

Abstract: We present the results of CO observations toward 14 host galaxies of long-duration gamma-ray bursts (GRBs) at z = 0.1-2.5 by using the Atacama Large Millimeter/submillimeter Array. We successfully detected CO(3-2) or CO(4-3) emission in eight hosts (z = 0.3-2), which more than doubles the sample size of GRB hosts with CO detection. The derived molecular gas mass is M gas = (0.2-6) × 10 10 M ⊙ assuming metallicity-dependent CO-to-H 2 conversion factors. By using the largest sample of GRB hosts with molecular ga… Show more

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Cited by 11 publications
(9 citation statements)
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References 158 publications
(281 reference statements)
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“…For the hosts of GRBs 120815A and 181020A, the upper limits are weaker than expected from their host stellar masses, whereas the limit on the molecular gas mass in GRB 080607 is close to that expected from its host stellar mass. Overall, most of the CO detections in GRB hosts do fall between the curves with M = 10 10 − 10 11 M (Hatsukade et al 2020), as expected from their stellar masses, though some hosts appear to show significant molecular deficits (in particular at z 1).…”
Section: Mass and Redshift Dependence Of α Cosupporting
confidence: 53%
See 3 more Smart Citations
“…For the hosts of GRBs 120815A and 181020A, the upper limits are weaker than expected from their host stellar masses, whereas the limit on the molecular gas mass in GRB 080607 is close to that expected from its host stellar mass. Overall, most of the CO detections in GRB hosts do fall between the curves with M = 10 10 − 10 11 M (Hatsukade et al 2020), as expected from their stellar masses, though some hosts appear to show significant molecular deficits (in particular at z 1).…”
Section: Mass and Redshift Dependence Of α Cosupporting
confidence: 53%
“…GRB hosts (Hatsukade et al 2020) GRB hosts (upper limits) H2 GRB hosts ( CO (Z/Z ) 1.4 ) H2 GRB hosts ( CO = CO, MW) QSO-DLAs (Kanekar et al 2020) (Upper lim. )…”
Section: Resultsmentioning
confidence: 99%
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“…The central and NW regions are molecule rich for their star formation rates (SFRs), but the SE region turned out to be molecule deficient. The total molecular gas mass turned out to be similar to that of other galaxies with similar redshift, star SFR, and stellar mass (Michałowski et al 2018b;Hatsukade et al 2020). Michałowski et al (2015) examined the H I line in five GRB host galaxies at z < 0.12, including the GRB 111005A host, using archival H I line from the Nançay radio telescope (Theureau et al 1998;Springob et al 2005).…”
Section: Introductionmentioning
confidence: 92%