Characterizing the FRB host galaxy population and its connection to transients in the local and extragalactic Universe

Bhandari, Shivani; Heintz, Kasper E.; Aggarwal, Kshitij; Marnoch, Lachlan; Day, Cherie K.; Sydnor, Jessica; Burke-Spolaor, Sarah; Law, Casey J.; Prochaska, J. Xavier; Tejos, Nicolas; Bannister, Keith W.; Butler, Bryan J.; Deller, Adam T.; Ekers, R. D.; Flynn, Chris; Fong, Wen-fai; James, Clancy W.; Lazio, T. Joseph W.; Luo, Rui; Mahony, Elizabeth K.; Ryder, Stuart D.; Sadler, Elaine M.; Shannon, Ryan M.; Han, JinLin; Lee, Kejia; Zhang, Bing

doi:10.48550/arxiv.2108.01282

Cited by 17 publications

(24 citation statements)

References 55 publications

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“…Indeed, the ratio for SDSS J0158+6542 lies above the envelope of the ratios for the xGASS galaxies with comparable sSFR values, indicating that SDSS J0158+6542 is a gas-rich galaxy. Further, SDSS J0158+6542 lies well below the star-forming main sequence, and is almost a quiescent galaxy (Bhandari et al 2021). The combination of gas-richness and near-quiescence indicates that SDSS J0158+6542 has acquired significant amounts of HI in the recent past.…”

Section: Resultsmentioning

confidence: 96%

A fast radio burst progenitor born in a galaxy merger

Kaur,

Kanekar,

Prochaska

2022

Preprint

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We report a Giant Metrewave Radio Telescope HI 21 cm mapping study of the neutral atomic hydrogen (HI) in the host galaxy of the fast radio burst (FRB) FRB 20180916B at z ≈ 0.03399. We find that the FRB host has an HI mass of M HI = (2.74 ± 0.33) × 10 9 M and a high HI-to-stellar mass ratio, ≈ 1.3. The FRB host is thus a gas-rich but near-quiescent galaxy, that is likely to have acquired a significant mass of HI in the recent past. The HI distribution is disturbed, with extended HI 21 cm emission detected in a north-eastern tail, a counter-tail towards the south, an HI hole between the galaxy centre and the FRB location, and a high HI column density measured close to the FRB position. The FRB host is part of a group with four companions detected in their HI 21 cm emission, the nearest of which is only 22 kpc from the FRB location. The gas-richness and disturbed HI distribution indicate that the FRB host has recently undergone a minor merger, which increased its HI mass, disturbed the HI in the galaxy disk, and compressed the HI near the FRB location to increase its surface density. We propose that this merger caused the burst of star-formation in the outskirts of the galaxy that gave rise to the FRB progenitor. The evidence for a minor merger is consistent with scenarios in which the FRB progenitor is a massive star, formed due to the merger event.

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Section: Resultsmentioning

confidence: 96%

A fast radio burst progenitor born in a galaxy merger

Kaur,

Kanekar,

Prochaska

2022

Preprint

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“…We used PATH in our simulations in order to incorporate the most robust means in the literature to perform this association, and to be able to easily simulate the effects of modifying our assumptions. We simulated somewhat large FRB localisation regions (FHWM of 1 arcsec), and shallow optical observations (the PanSTARRS limit of 𝑚 𝑟 = 23.2) in order to better highlight the effects of the optical selection bias; some FRBs used in current studies (e.g., Bhandari et al 2021) are better localised, and most have deeper optical observations than are available from PanSTARRS. Current samples are therefore not likely to be subject to optical selection biases as large as those we identify.…”

Section: Tuning Pathmentioning

confidence: 99%

“…A Hubble Space Telescope study of the environments of a sample of eight FRBs with sub-arcsecond localisations revealed a link with spiral-arm structures, but generally unremarkable underlying stellar-mass and SFR densities (Mannings et al 2020). Comparisons of the host-galaxy properties and projected physical offsets 2 of FRBs with populations of other extragalactic transients and compact objects generally indicate similarities with LGRBs and CCSNe, but little else (Bochenek et al 2021;Bhandari et al 2021). The wide diversity in host galaxies and host environments within the FRB population paints an inconsistent picture, possibly hinting at multiple progenitor channels, or possibly implicating selection biases in the observed FRB sample.…”

Section: Introductionmentioning

confidence: 99%

“…The first localised repeating FRB source (Chatterjee et al 2017) and its recently discovered analogue (Niu et al 2021) originate from regions of significant star-formation within dwarf galaxies, and are associated with highly magnetised environments and persistent radio sources. However, the remaining sample of localised repeating FRBs originates in a diverse range of environments, from a globular cluster (Kirsten et al 2021), to potentially more prosaic locations and galaxies (Marcote et al 2020;Heintz et al 2020;Ravi et al 2021;Fong et al 2021;Bhandari et al 2021). The first localisations of apparently non-repeating FRBs revealed host galaxies that are similar to the Milky Way (Bannister et al 2019;Ravi et al 2019), in marked contrast to the host of the first localised repeating FRB (Chatterjee et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The first localisations of apparently non-repeating FRBs revealed host galaxies that are similar to the Milky Way (Bannister et al 2019;Ravi et al 2019), in marked contrast to the host of the first localised repeating FRB (Chatterjee et al 2017). The subsequent sample of localisations of apparently non-repeating FRBs (Prochaska et al 2019;Macquart et al 2020;Law et al 2020;Heintz et al 2020;Bhandari et al 2021) also revealed a diverse selection of host galaxies and environments, ranging over a few orders of magnitude in stellar mass (𝑀 * ), star-formation rate (SFR), and projected physical offset from the centres of light (Bhandari et al 2021). A Hubble Space Telescope study of the environments of a sample of eight FRBs with sub-arcsecond localisations revealed a link with spiral-arm structures, but generally unremarkable underlying stellar-mass and SFR densities (Mannings et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Selection Biases on the Analysis of Localised Fast Radio Bursts

Seebeck¹,

Ravi²,

Connor³

et al. 2021

Preprint

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The objects that emit extragalatic fast radio bursts (FRBs) remain unidentified. Studies of the host galaxies and environments of accurately localised ( 1 arcsec) FRBs promise to deliver critical insights into the nature of their progenitors. Here we demonstrate the effects of observational selection biases on analyses of the distributions of FRB host-galaxy properties (including star-formation rate, SFR, and stellar mass, 𝑀 * ), and on the distributions of FRB offsets from the centres of their hosts. We consider the effects of "radio selection", wherein FRBs with larger dispersion measures and scattering timescales are less likely to be detected, and the effects of "optical selection", wherein FRBs with fainter host galaxies are more likely to have unidentified or mis-identified hosts. We develop a plausible, illustrative model for these effects in observations of FRBs and their host galaxies by combining the output catalogues of a semi-analytic galaxy formation model with a recently developed algorithm to associate FRBs with host galaxies (PATH). We find that optical selection biases are most important for the host-galaxy 𝑀 * and SFR distributions, and that radio selection biases are most important for the distribution of FRB projected physical offsets. For our fiducial simulation of FRBs at 𝑧 < 0.5, the selection biases cause the median host-galaxy SFR to be increased by ∼ 0.3 dex, and the median 𝑀 * by ∼ 0.5 dex. The median projected physical offset is increased by ∼ 2 kpc (∼ 0.25 dex). These effects are sufficiently large so as to merit careful consideration in studies of localised FRBs, and our simulations provide a guide towards their mitigation.

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A fast radio burst source at a complex magnetized site in a barred galaxy

Niu

Chen

et al. 2022

Nature

127

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Fast radio bursts (FRBs) are highly dispersed radio bursts prevailing in the universe [1][2][3] . The recent detection of FRB 200428 from a Galactic magnetar [4][5][6][7][8] suggested that at least some FRBs originate from magnetars, but it is unclear whether the majority of cosmological FRBs, especially the actively repeating ones, are produced from the magnetar channel. Here we report the detection of 1863 polarised bursts from the repeating source FRB 20201124A 9 during a dedicated radio observational campaign of Five-hundred-meter Aperture Spherical radio Telescope (FAST). The large sample of radio bursts detected in 88 hr over 54 days indicate a significant, irregular, short-time variation of the Faraday rotation measure (RM) of the source during the first 36 days, followed by a constant RM during the later 18 days. Significant circular polarisation up to 75% was observed in a good fraction of bursts. Evidence suggests that some low-level circular polarisation originates from the conversion from linear polarisation during the propagation of the radio waves, but an intrinsic radiation mechanism is required to produce the higher degree of circular polarisation. All of these features provide evidence for a more complicated, dynamically evolving, magnetised immediate environment around this FRB source. Its host galaxy was previously known 10-12 . Our optical observations reveal that it is a Milky-Way-sized, metal-rich, barred-spiral galaxy at redshift z = 0.09795 ± 0.00003, with the FRB source residing in a low stellar density, interarm region

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Characterizing the FRB host galaxy population and its connection to transients in the local and extragalactic Universe

Cited by 17 publications

References 55 publications

A fast radio burst progenitor born in a galaxy merger

A fast radio burst progenitor born in a galaxy merger

The Effects of Selection Biases on the Analysis of Localised Fast Radio Bursts

A fast radio burst source at a complex magnetized site in a barred galaxy

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