Dissecting the Local Environment of FRB 190608 in the Spiral Arm of its Host Galaxy

Abstract

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 (${\Sigma }_{\mathrm{SFR}}=1.5\times 10^{-2}{M}_{\odot }\mathrm{y}{\mathrm{r}}^{-1}\mathrm{kp}{\mathrm{c}}^{-2}$) 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 ${\mu }_{\mathrm{H}\beta }=(3.36\pm 0.21)\times 10^{-17}\mathrm{erg}{\mathrm{s}}^{-1}\mathrm{c}{\mathrm{m}}^{-2}\mathrm{arcse}{\mathrm{c}}^{-2}$, we infer an extinction-corrected H$\alpha$ surface brightness and compute a dispersion measure (DM) from the interstellar medium of HG 190608 of $\mathrm{D}{\mathrm{M}}_{\mathrm{Host},\mathrm{ISM}}=94\pm 38\mathrm{pc}\mathrm{c}{\mathrm{m}}^{-3}$. The galaxy rotates with a circular velocity $v_{\mathrm{circ}}=141\pm 8\mathrm{km}{\mathrm{s}}^{-1}$ at an inclination $i_{\mathrm{gas}}=37\pm 3^{\circ }$, giving a dynamical mass $M_{\mathrm{halo}}^{\mathrm{dyn}}\approx 10^{11.96\pm 0.08}{M}_{\odot }$. This implies a halo contribution to the DM of $\mathrm{D}{\mathrm{M}}_{\mathrm{Host},\mathrm{Halo}}=55\pm 25\mathrm{pc}\mathrm{c}{\mathrm{m}}^{-3}$ subject to assumptions on the density profile and fraction of baryons retained. From the galaxy rotation curve, we infer a bar-induced pattern speed of ${\Omega }_p=34\pm 6\mathrm{km}{\mathrm{s}}^{-1}\mathrm{kp}{\mathrm{c}}^{-1}$ using linear resonance theory. We then calculate the maximum time since star-formation for a progenitor using the furthest distance to the arm's leading edge within the localization, and find $t_{\mathrm{enc}}=21_{-6}^{+25}$ Myr. Unlike previous high-resolution studies of FRB environments, we find no evidence of disturbed morphology, emission, or kinematics for FRB 190608.

21 pages, 11 figure files, 10 figures in paper, 3 tables. Accepted to ApJ on Sept. 16, 2021, published Nov. 29, 2021

References in corpus (27)

• Array Programming with NumPy
• The direct localization of a fast radio burst and its host
• Long gamma-ray bursts and core-collapse supernovae have different environments
• The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102
• A census of baryons in the Universe from localized fast radio bursts
• Fast Radio Bursts
• A repeating fast radio burst source localised to a nearby spiral galaxy
• A single fast radio burst localized to a massive galaxy at cosmological distance
• A fast radio burst localised to a massive galaxy
• Dawes Review 4: Spiral Structures in Disc Galaxies
• Host Galaxy Properties and Offset Distributions of Fast Radio Bursts: Implications for their Progenitors
• Probing Galactic Halos with Fast Radio Bursts
• UVUDF: Ultraviolet Through Near-infrared Catalog and Photometric Redshifts of Galaxies in the Hubble Ultra Deep Field
• The host galaxies and progenitors of Fast Radio Bursts localized with the Australian Square Kilometre Array Pathfinder
• Cloud Scale ISM Structure and Star Formation in M51
• High time resolution and polarisation properties of ASKAP-localised fast radio bursts
• Formation Rates and Evolution Histories of Magnetars
• A SINFONI view of Galaxy Centers: Morphology and Kinematics of five Nuclear Star Formation Rings
• The 60 pc Environment of FRB 20180916B
• Disentangling the Cosmic Web Towards FRB 190608
• CHANG-ES XV: Large-scale magnetic field reversals in the radio halo of NGC 4631
• The FLASHES Survey I: Integral Field Spectroscopy of the CGM around 48 $z=2.3-3.1$ QSOs
• FRB as Products of Accretion Disc Funnels
• Locating the intense interstellar scattering towards the inner Galaxy
• Numerical Simulations of Equatorially-Asymmetric Magnetized Supernovae: Formation of Magnetars and Their Kicks
• Energy function, formation rate and low-metallicity environment of fast radio bursts
• A search for supernova-like optical counterparts to ASKAP-localised Fast Radio Bursts

Cited by in corpus (19)

• Characterizing the FRB host galaxy population and its connection to transients in the local and extragalactic Universe
• High time resolution and polarisation properties of ASKAP-localised fast radio bursts
• An 8\% Determination of the Hubble Constant from localized Fast Radio Bursts
• The Large Dispersion and Scattering of FRB 20190520B are Dominated by the Host Galaxy
• Modeling Fast Radio Burst Dispersion and Scattering Properties in the First CHIME/FRB Catalog
• Constraining the Cosmic Baryon Distribution with Fast Radio Burst Foreground Mapping
• A population analysis of pulse broadening in ASKAP Fast Radio Bursts
• Cosmological-model-independent determination of Hubble constant from fast radio bursts and Hubble parameter measurements
• An 8.0\% Determination of the Baryon Fraction in the Intergalactic Medium from Localized Fast Radio Bursts
• A forecast of using fast radio burst observations to constrain holographic dark energy
• Probing cosmology and gastrophysics with fast radio bursts: Cross-correlations of dark matter haloes and cosmic dispersion measures
• A Comprehensive Analysis on Repeating Fast Radio Bursts
• The Galactic neutron star population I - an extragalactic view of the Milky Way and the implications for fast radio bursts
• Cosmological model-independent constraints on the baryon fraction in the IGM from fast radio bursts and supernovae data
• Search for the correlations between host properties and $\mathrm{D}{\mathrm{M}}_{\mathrm{host}}$ of fast radio bursts: constraints on the baryon mass fraction in IGM
• Dispersion measures of fast radio burst host galaxies derived from IllustrisTNG simulation
• Constraints on the Helium Abundance from Fast Radio Bursts
• Estimating the contribution of foreground halos to the FRB 180924 dispersion measure
• Measuring interstellar turbulence in fast radio burst host galaxies