期刊
ASTROPHYSICAL JOURNAL
卷 922, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac2818
关键词
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资金
- ESO programmes [0102.A-0450(A), 0103.A-0101(B)]
- NSF [AST-1911140, AST-1910471]
- Nantucket Maria Mitchell Association
- Theodore Dunham, Jr. Grant of the Fund for Astrophysical Research
- Australian Research Council (ARC) [DP180100857]
- ARC Future Fellowship [FT190100155, FT150100415]
- Macquarie University
- FONDECYT [11191217]
- Icelandic Research Fund [162948051]
- National Collaborative Research Infrastructure Strategy
- Government of Western Australia
- Science and Industry Endowment Fund
- NASA [NAS5-26555, 15878]
- STScI under NASA [NAS5-26555]
- Australian Government
In this study, a high-resolution analysis of the host galaxy of fast radio burst (FRB) 190608 was conducted, revealing a coincidence between the localization of FRB and a knot of star formation in the galaxy. The research also inferred the dispersion measure (DM) of the galaxy and its dynamical mass.
We present a high-resolution analysis of the host galaxy of fast radio burst (FRB) 190608, an SB(r)c galaxy at z = 0.11778 (hereafter HG 190608), to dissect its local environment and its contributions to the FRB properties. Our Hubble Space Telescope Wide Field Camera 3 ultraviolet and visible light image reveals that the subarcsecond localization of FRB 190608 is coincident with a knot of star formation (Sigma(SFR) = 1.5 x 10(-2) M (circle dot) yr(-1) kpc(-2)) in the northwest spiral arm of HG 190608. Using H beta emission present in our Keck Cosmic Web Imager integral field spectrum of the galaxy with a surface brightness of mu H-beta=(3.36 +/- 0.21) x 10(-17) ergs(-1) cm(-2) arcsec(-2), we infer an extinction-corrected H alpha surface brightness and compute a dispersion measure (DM) from the interstellar medium of HG 190608 of DMHost,ISM = 94 +/- 38 pc cm(-3). The galaxy rotates with a circular velocity v (circ) = 141 +/- 8 km s(-1) at an inclination i(gas) = 37 degrees +/- 3 degrees, giving a dynamical mass Mhalodyn approximate to 1011.96 +/- 0.08M circle dot
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