Chronicling the Host Galaxy Properties of the Remarkable Repeating FRB 20201124A
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Chronicling the Host Galaxy Properties of the Remarkable Repeating FRB 20201124A. / Fong, Wen-fai; Dong, Yuxin; Leja, Joel; Bhandari, Shivani; Day, Cherie K.; Deller, Adam T.; Kumar, Pravir; Prochaska, J. Xavier; Scott, Danica R.; Bannister, Keith W.; Eftekhari, Tarraneh; Gordon, Alexa C.; Heintz, Kasper E.; James, Clancy W.; Kilpatrick, Charles D.; Mahony, Elizabeth K.; Escorial, Alicia Rouco; Ryder, Stuart D.; Shannon, Ryan M.; Tejos, Nicolas.
I: Astrophysical Journal Letters, Bind 919, Nr. 2, L23, 10.2021.Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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TY - JOUR
T1 - Chronicling the Host Galaxy Properties of the Remarkable Repeating FRB 20201124A
AU - Fong, Wen-fai
AU - Dong, Yuxin
AU - Leja, Joel
AU - Bhandari, Shivani
AU - Day, Cherie K.
AU - Deller, Adam T.
AU - Kumar, Pravir
AU - Prochaska, J. Xavier
AU - Scott, Danica R.
AU - Bannister, Keith W.
AU - Eftekhari, Tarraneh
AU - Gordon, Alexa C.
AU - Heintz, Kasper E.
AU - James, Clancy W.
AU - Kilpatrick, Charles D.
AU - Mahony, Elizabeth K.
AU - Escorial, Alicia Rouco
AU - Ryder, Stuart D.
AU - Shannon, Ryan M.
AU - Tejos, Nicolas
PY - 2021/10
Y1 - 2021/10
N2 - We present the Australian Square Kilometre Array Pathfinder localization and follow-up observations of the host galaxy of the repeating fast radio burst (FRB) source, FRB 20201124A, the fifth such extragalactic repeating FRB with an identified host. From spectroscopic observations using the 6.5 m MMT Observatory, we derive a redshift z = 0.0979 +/- 0.0001, a star formation rate inferred from H alpha emission SFR(H alpha) approximate to 2.1 M (circle dot) yr(-1), and a gas-phase metallicity of 12+log(O/H) approximate to 9.0. By jointly modeling the 12 filter optical-mid-infrared (MIR) photometry and spectroscopy of the host, we infer a median stellar mass of similar to 2 x 10(10) M (circle dot), internal dust extinction A ( V ) approximate to 1-1.5 mag, and a mass-weighted stellar population age of similar to 5-6 Gyr. Connecting these data to the radio and X-ray observations, we cannot reconcile the broadband behavior with strong active galactic nucleus activity and instead attribute the dominant source of persistent radio emission to star formation, likely originating from the circumnuclear region of the host. The modeling also indicates a hot dust component contributing to the MIR luminosity at a level of similar to 10%-30%. We model the host galaxy's star formation and mass assembly histories, finding that the host assembled >90% of its mass by 1 Gyr ago and exhibited a fairly constant SFR for most of its existence, with no clear evidence of past starburst activity.
AB - We present the Australian Square Kilometre Array Pathfinder localization and follow-up observations of the host galaxy of the repeating fast radio burst (FRB) source, FRB 20201124A, the fifth such extragalactic repeating FRB with an identified host. From spectroscopic observations using the 6.5 m MMT Observatory, we derive a redshift z = 0.0979 +/- 0.0001, a star formation rate inferred from H alpha emission SFR(H alpha) approximate to 2.1 M (circle dot) yr(-1), and a gas-phase metallicity of 12+log(O/H) approximate to 9.0. By jointly modeling the 12 filter optical-mid-infrared (MIR) photometry and spectroscopy of the host, we infer a median stellar mass of similar to 2 x 10(10) M (circle dot), internal dust extinction A ( V ) approximate to 1-1.5 mag, and a mass-weighted stellar population age of similar to 5-6 Gyr. Connecting these data to the radio and X-ray observations, we cannot reconcile the broadband behavior with strong active galactic nucleus activity and instead attribute the dominant source of persistent radio emission to star formation, likely originating from the circumnuclear region of the host. The modeling also indicates a hot dust component contributing to the MIR luminosity at a level of similar to 10%-30%. We model the host galaxy's star formation and mass assembly histories, finding that the host assembled >90% of its mass by 1 Gyr ago and exhibited a fairly constant SFR for most of its existence, with no clear evidence of past starburst activity.
KW - FAST RADIO-BURST
KW - MASS-METALLICITY RELATION
KW - DELAY-TIME DISTRIBUTION
KW - STAR-FORMING GALAXIES
KW - GALACTIC-CENTER
KW - STELLAR
KW - POPULATION
KW - EMISSION
KW - ENVIRONMENT
KW - SUPERNOVAE
U2 - 10.3847/2041-8213/ac242b
DO - 10.3847/2041-8213/ac242b
M3 - Letter
VL - 919
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8205
IS - 2
M1 - L23
ER -
ID: 281283550