Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS
Late-time (∼a year) radio follow-up of optically discovered tidal disruption events (TDEs) is increasingly resulting in detections at radio wavelengths, and there is growing evidence for this late-time radio activity to be common to the broad class of subrelativistic TDEs. Detailed studies of some o...
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2024-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/ad64d3 |
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| author | Akash Anumarlapudi Dougal Dobie David L. Kaplan Tara Murphy Assaf Horesh Emil Lenc Laura Driessen Stefan W. Duchesne Hannah Dykaar B. M. Gaensler Timothy J. Galvin Joe Grundy George Heald Aidan W. Hotan Minh Huynh James K. Leung David McConnell Vanessa A. Moss Joshua Pritchard Wasim Raja Kovi Rose Gregory Sivakoff Yuanming Wang Ziteng Wang Mark H. Wieringa Matthew T. Whiting |
| author_facet | Akash Anumarlapudi Dougal Dobie David L. Kaplan Tara Murphy Assaf Horesh Emil Lenc Laura Driessen Stefan W. Duchesne Hannah Dykaar B. M. Gaensler Timothy J. Galvin Joe Grundy George Heald Aidan W. Hotan Minh Huynh James K. Leung David McConnell Vanessa A. Moss Joshua Pritchard Wasim Raja Kovi Rose Gregory Sivakoff Yuanming Wang Ziteng Wang Mark H. Wieringa Matthew T. Whiting |
| author_sort | Akash Anumarlapudi |
| collection | DOAJ |
| description | Late-time (∼a year) radio follow-up of optically discovered tidal disruption events (TDEs) is increasingly resulting in detections at radio wavelengths, and there is growing evidence for this late-time radio activity to be common to the broad class of subrelativistic TDEs. Detailed studies of some of these TDEs at radio wavelengths are also challenging the existing models for radio emission. Using all-sky multiepoch data from the Australian Square Kilometre Array Pathfinder (ASKAP), taken as a part of the Rapid ASKAP Continuum Survey (RACS), we searched for radio counterparts to a sample of optically discovered TDEs. We detected late-time emission at RACS frequencies (742–1032 MHz) in five TDEs, reporting the independent discovery of radio emission from TDE AT 2019ahk and extending the time baseline out to almost 3000 days for some events. Overall, we find that at least ${22}_{-11}^{+15} \% $ of the population of optically discovered TDEs has detectable radio emission in the RACS survey, while also noting that the true fraction can be higher given the limited cadence (two epochs separated by ∼3 yr) of the survey. Finally, we project that the ongoing higher-cadence (∼2 months) ASKAP Variable and Slow Transients survey can detect ∼20 TDEs in its operational span (4 yr), given the current rate from optical surveys. |
| format | Article |
| id | doaj-art-7cea9307ed3e4ae5b26af5d81dc9c2b9 |
| institution | OA Journals |
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| language | English |
| publishDate | 2024-01-01 |
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| spelling | doaj-art-7cea9307ed3e4ae5b26af5d81dc9c2b92025-08-20T01:48:05ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01974224110.3847/1538-4357/ad64d3Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACSAkash Anumarlapudi0https://orcid.org/0000-0002-8935-9882Dougal Dobie1https://orcid.org/0000-0003-0699-7019David L. Kaplan2https://orcid.org/0000-0001-6295-2881Tara Murphy3https://orcid.org/0000-0002-2686-438XAssaf Horesh4https://orcid.org/0000-0002-5936-1156Emil Lenc5https://orcid.org/0000-0002-9994-1593Laura Driessen6https://orcid.org/0000-0002-4405-3273Stefan W. Duchesne7https://orcid.org/0000-0002-3846-0315Hannah Dykaar8https://orcid.org/0009-0008-6396-0849B. M. Gaensler9https://orcid.org/0000-0002-3382-9558Timothy J. Galvin10https://orcid.org/0000-0002-2801-766XJoe Grundy11https://orcid.org/0000-0002-4440-8046George Heald12https://orcid.org/0000-0002-2155-6054Aidan W. Hotan13https://orcid.org/0000-0001-7464-8801Minh Huynh14https://orcid.org/0000-0002-8314-9753James K. Leung15https://orcid.org/0000-0002-9415-3766David McConnell16https://orcid.org/0000-0002-2819-9977Vanessa A. Moss17https://orcid.org/0000-0002-3005-9738Joshua Pritchard18https://orcid.org/0000-0003-1575-5249Wasim Raja19Kovi Rose20https://orcid.org/0000-0002-7329-3209Gregory Sivakoff21https://orcid.org/0000-0001-6682-916XYuanming Wang22https://orcid.org/0000-0003-0203-1196Ziteng Wang23https://orcid.org/0000-0002-2066-9823Mark H. Wieringa24https://orcid.org/0000-0002-7721-8660Matthew T. Whiting25https://orcid.org/0000-0003-1160-2077Department of Physics, University of Wisconsin-Milwaukee , P.O. Box 413, Milwaukee, WI 53201, USA ; aakash@uwm.eduCentre for Astrophysics and Supercomputing, Swinburne University of Technology , Hawthorn, VIC 3122, Australia; ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) , Hawthorn, VIC, Australia; Sydney Institute for Astronomy, School of Physics, University of Sydney , NSW 2006, AustraliaDepartment of Physics, University of Wisconsin-Milwaukee , P.O. Box 413, Milwaukee, WI 53201, USA ; aakash@uwm.eduARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) , Hawthorn, VIC, Australia; Sydney Institute for Astronomy, School of Physics, University of Sydney , NSW 2006, AustraliaRacah Institute of Physics, The Hebrew University of Jerusalem , Jerusalem, 91904, IsraelCSIRO Space and Astronomy , P.O. Box 76, Epping, NSW 1710, AustraliaSydney Institute for Astronomy, School of Physics, University of Sydney , NSW 2006, AustraliaCSIRO Space and Astronomy , P.O. Box 1130, Bentley, WA 6102, AustraliaDunlap Institute for Astronomy and Astrophysics, University of Toronto , 50 St. George St., Toronto, ON M5S 3H4, Canada; David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto , 50 St. George St., Toronto, ON M5S 3H4, CanadaDunlap Institute for Astronomy and Astrophysics, University of Toronto , 50 St. George St., Toronto, ON M5S 3H4, Canada; David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto , 50 St. George St., Toronto, ON M5S 3H4, Canada; Department of Astronomy and Astrophysics, University of California Santa Cruz , 1156 High Street, Santa Cruz, CA 95064, USACSIRO Space and Astronomy , P.O. Box 1130, Bentley, WA 6102, Australia; International Centre for Radio Astronomy Research—Curtin University , 1 Turner Avenue, Bentley, WA 6102, AustraliaCSIRO Space and Astronomy , P.O. Box 1130, Bentley, WA 6102, Australia; International Centre for Radio Astronomy Research—Curtin University , 1 Turner Avenue, Bentley, WA 6102, AustraliaCSIRO Space and Astronomy , P.O. Box 1130, Bentley, WA 6102, AustraliaCSIRO Space and Astronomy , P.O. Box 1130, Bentley, WA 6102, AustraliaCSIRO Space and Astronomy , P.O. Box 1130, Bentley, WA 6102, AustraliaRacah Institute of Physics, The Hebrew University of Jerusalem , Jerusalem, 91904, Israel; Dunlap Institute for Astronomy and Astrophysics, University of Toronto , 50 St. George St., Toronto, ON M5S 3H4, CanadaCSIRO Space and Astronomy , P.O. Box 76, Epping, NSW 1710, AustraliaSydney Institute for Astronomy, School of Physics, University of Sydney , NSW 2006, Australia; CSIRO Space and Astronomy , P.O. Box 76, Epping, NSW 1710, AustraliaARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) , Hawthorn, VIC, Australia; Sydney Institute for Astronomy, School of Physics, University of Sydney , NSW 2006, Australia; CSIRO Space and Astronomy , P.O. Box 76, Epping, NSW 1710, AustraliaCSIRO Space and Astronomy , P.O. Box 76, Epping, NSW 1710, AustraliaSydney Institute for Astronomy, School of Physics, University of Sydney , NSW 2006, Australia; CSIRO Space and Astronomy , P.O. Box 76, Epping, NSW 1710, AustraliaDepartment of Physics, University of Alberta , CCIS 4-181, Edmonton, AB T6G 2E1, CanadaCentre for Astrophysics and Supercomputing, Swinburne University of Technology , Hawthorn, VIC 3122, Australia; ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) , Hawthorn, VIC, AustraliaInternational Centre for Radio Astronomy Research—Curtin University , 1 Turner Avenue, Bentley, WA 6102, AustraliaCSIRO Space and Astronomy , P.O. Box 76, Epping, NSW 1710, AustraliaCSIRO Space and Astronomy , P.O. Box 76, Epping, NSW 1710, AustraliaLate-time (∼a year) radio follow-up of optically discovered tidal disruption events (TDEs) is increasingly resulting in detections at radio wavelengths, and there is growing evidence for this late-time radio activity to be common to the broad class of subrelativistic TDEs. Detailed studies of some of these TDEs at radio wavelengths are also challenging the existing models for radio emission. Using all-sky multiepoch data from the Australian Square Kilometre Array Pathfinder (ASKAP), taken as a part of the Rapid ASKAP Continuum Survey (RACS), we searched for radio counterparts to a sample of optically discovered TDEs. We detected late-time emission at RACS frequencies (742–1032 MHz) in five TDEs, reporting the independent discovery of radio emission from TDE AT 2019ahk and extending the time baseline out to almost 3000 days for some events. Overall, we find that at least ${22}_{-11}^{+15} \% $ of the population of optically discovered TDEs has detectable radio emission in the RACS survey, while also noting that the true fraction can be higher given the limited cadence (two epochs separated by ∼3 yr) of the survey. Finally, we project that the ongoing higher-cadence (∼2 months) ASKAP Variable and Slow Transients survey can detect ∼20 TDEs in its operational span (4 yr), given the current rate from optical surveys.https://doi.org/10.3847/1538-4357/ad64d3Radio transient sourcesTidal disruptionExtragalactic radio sourcesRadio continuum emissionRadio sources |
| spellingShingle | Akash Anumarlapudi Dougal Dobie David L. Kaplan Tara Murphy Assaf Horesh Emil Lenc Laura Driessen Stefan W. Duchesne Hannah Dykaar B. M. Gaensler Timothy J. Galvin Joe Grundy George Heald Aidan W. Hotan Minh Huynh James K. Leung David McConnell Vanessa A. Moss Joshua Pritchard Wasim Raja Kovi Rose Gregory Sivakoff Yuanming Wang Ziteng Wang Mark H. Wieringa Matthew T. Whiting Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS The Astrophysical Journal Radio transient sources Tidal disruption Extragalactic radio sources Radio continuum emission Radio sources |
| title | Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS |
| title_full | Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS |
| title_fullStr | Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS |
| title_full_unstemmed | Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS |
| title_short | Radio Afterglows from Tidal Disruption Events: An Unbiased Sample from ASKAP RACS |
| title_sort | radio afterglows from tidal disruption events an unbiased sample from askap racs |
| topic | Radio transient sources Tidal disruption Extragalactic radio sources Radio continuum emission Radio sources |
| url | https://doi.org/10.3847/1538-4357/ad64d3 |
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