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15 results on '"Kilpatrick, C.D."'

1. A Fast Radio Burst in a Compact Galaxy Group at z ∼ 1

Author

Gordon, A.C., Fong, W.F., Simha, S., Dong, Y., Kilpatrick, C.D., Deller, A.T., Ryder, S.D., Eftekhari, T., Glowacki, Marcin, Marnoch, L., Muller, A.R., Nugent, A.E., Palmese, A., Prochaska, J.X., Rafelski, M., Shannon, R.M., Tejos, N., Gordon, A.C., Fong, W.F., Simha, S., Dong, Y., Kilpatrick, C.D., Deller, A.T., Ryder, S.D., Eftekhari, T., Glowacki, Marcin, Marnoch, L., Muller, A.R., Nugent, A.E., Palmese, A., Prochaska, J.X., Rafelski, M., Shannon, R.M., and Tejos, N.

Abstract

FRB 20220610A is a high-redshift fast radio burst (FRB) that has not been observed to repeat. Here, we present rest-frame UV and optical Hubble Space Telescope observations of the field of FRB 20220610A. The imaging reveals seven extended sources, one of which we identify as the most likely host galaxy with a spectroscopic redshift of z = 1.017. We spectroscopically confirm three additional sources to be at the same redshift and identify the system as a compact galaxy group with possible signs of interaction among group members. We determine the host of FRB 20220610A to be a star-forming galaxy with a stellar mass of ≈109.7 M ⊙, mass-weighted age of ≈2.6 Gyr, and star formation rate (integrated over the last 100 Myr) of ≈1.7 M ⊙ yr−1. These host properties are commensurate with the star-forming field galaxy population at z ∼ 1 and trace their properties analogously to the population of low-z FRB hosts. Based on estimates of the total stellar mass of the galaxy group, we calculate a fiducial contribution to the observed dispersion measure from the intragroup medium of ≈90-182 pc cm−3 (rest frame). This leaves a significant excess of 515 − 272 + 122 pc cm−3 (in the observer frame); further observation will be required to determine the origin of this excess. Given the low occurrence rates of galaxies in compact groups, the discovery of an FRB in one demonstrates a rare, novel environment in which FRBs can occur. As such groups may represent ongoing or future mergers that can trigger star formation, this supports a young stellar progenitor relative to star formation.

Published
2024

2. Publisher Correction: A very luminous jet from the disruption of a star by a massive black hole

Author

Andreoni, I., Coughlin, M.W., Perley, D.A., Yao, Y., Lu, W., Cenko, S.B., Kumar, H., Anand, S., Ho, A.Y.Q., Kasliwal, M.M., Postigo, A. de Ugarte, Sagues-Carracedo, A., Schulze, S., Kann, D.A., Kulkarni, S.R., Sollerman, J., Tanvir, N., Rest, A., Izzo, L., Somalwar, J.J., Kaplan, D.L., Ahumada, T., Anupama, G.C., Auchettl, K., Barway, S., Bellm, E.C., Bhalerao, V., Bloom, J.S., Bremer, M., Bulla, M., Burns, E., Campana, S., Chandra, P., Charalampopoulos, P., Cooke, J., D'Elia, V., Das, K.K., Dobie, D., Fernandez, J.F.A., Freeburn, J., Fremling, C., Gezari, S., Goode, S., Graham, M.J., Hammerstein, E., Karambelkar, V.R., Kilpatrick, C.D., Kool, E.C., Krips, M., Laher, R.R., Leloudas, G., Levan, A.J., Lundquist, M.J., Mahabal, A.A., Medford, M.S., Miller, M.C., Moller, A., Mooley, K.P., Nayana, A.J., Nir, G., Pang, P.T.H., Paraskeva, E., Perley, R.A., Petitpas, G., Pursiainen, M., Ravi, V., Ridden-Harper, R., Riddle, R., Rigault, M., Rodriguez, A.C., Rusholme, B., Sharma, Y., Smith, I.A., Stein, R.D., Thone, C., Tohuvavohu, A., Valdes, F., Roestel, J. van, Vergani, S.D., Wang, Q., Zhang, J., Andreoni, I., Coughlin, M.W., Perley, D.A., Yao, Y., Lu, W., Cenko, S.B., Kumar, H., Anand, S., Ho, A.Y.Q., Kasliwal, M.M., Postigo, A. de Ugarte, Sagues-Carracedo, A., Schulze, S., Kann, D.A., Kulkarni, S.R., Sollerman, J., Tanvir, N., Rest, A., Izzo, L., Somalwar, J.J., Kaplan, D.L., Ahumada, T., Anupama, G.C., Auchettl, K., Barway, S., Bellm, E.C., Bhalerao, V., Bloom, J.S., Bremer, M., Bulla, M., Burns, E., Campana, S., Chandra, P., Charalampopoulos, P., Cooke, J., D'Elia, V., Das, K.K., Dobie, D., Fernandez, J.F.A., Freeburn, J., Fremling, C., Gezari, S., Goode, S., Graham, M.J., Hammerstein, E., Karambelkar, V.R., Kilpatrick, C.D., Kool, E.C., Krips, M., Laher, R.R., Leloudas, G., Levan, A.J., Lundquist, M.J., Mahabal, A.A., Medford, M.S., Miller, M.C., Moller, A., Mooley, K.P., Nayana, A.J., Nir, G., Pang, P.T.H., Paraskeva, E., Perley, R.A., Petitpas, G., Pursiainen, M., Ravi, V., Ridden-Harper, R., Riddle, R., Rigault, M., Rodriguez, A.C., Rusholme, B., Sharma, Y., Smith, I.A., Stein, R.D., Thone, C., Tohuvavohu, A., Valdes, F., Roestel, J. van, Vergani, S.D., Wang, Q., and Zhang, J.

Abstract

Contains fulltext : 292562.pdf (Publisher’s version ) (Closed access)

Published
2023

3. The Demographics, Stellar Populations, and Star Formation Histories of Fast Radio Burst Host Galaxies: Implications for the Progenitors

Author

Gordon, A.C., Fong, W.F., Kilpatrick, C.D., Eftekhari, T., Leja, J., Prochaska, J.X., Nugent, A.E., Bhandari, S., Blanchard, P.K., Caleb, M., Day, C.K., Deller, A.T., Dong, Y., Glowacki, Marcin, Gourdji, K., Mannings, A.G., Mahoney, E.K., Marnoch, L., Miller, A.A., Paterson, K., Rastinejad, J.C., Ryder, S.D., Sadler, E.M., Scott, D.R., Sears, H., Shannon, R.M., Simha, S., Stappers, B.W., Tejos, N., Gordon, A.C., Fong, W.F., Kilpatrick, C.D., Eftekhari, T., Leja, J., Prochaska, J.X., Nugent, A.E., Bhandari, S., Blanchard, P.K., Caleb, M., Day, C.K., Deller, A.T., Dong, Y., Glowacki, Marcin, Gourdji, K., Mannings, A.G., Mahoney, E.K., Marnoch, L., Miller, A.A., Paterson, K., Rastinejad, J.C., Ryder, S.D., Sadler, E.M., Scott, D.R., Sears, H., Shannon, R.M., Simha, S., Stappers, B.W., and Tejos, N.

Abstract

We present a comprehensive catalog of observations and stellar population properties for 23 highly secure host galaxies of fast radio bursts (FRBs). Our sample comprises 6 repeating FRBs and 17 apparent nonrepeaters. We present 82 new photometric and 8 new spectroscopic observations of these hosts. Using stellar population synthesis modeling and employing nonparametric star formation histories (SFHs), we find that FRB hosts have a median stellar mass of ≈109.9 M ⊙, mass-weighted age ≈5.1 Gyr, and ongoing star formation rate ≈1.3 M ⊙ yr-1 but span wide ranges in all properties. Classifying the hosts by degree of star formation, we find that 87% (20 of 23 hosts) are star-forming, two are transitioning, and one is quiescent. The majority trace the star-forming main sequence of galaxies, but at least three FRBs in our sample originate in less-active environments (two nonrepeaters and one repeater). Across all modeled properties, we find no statistically significant distinction between the hosts of repeaters and nonrepeaters. However, the hosts of repeating FRBs generally extend to lower stellar masses, and the hosts of nonrepeaters arise in more optically luminous galaxies. While four of the galaxies with the clearest and most prolonged rises in their SFHs all host repeating FRBs, demonstrating heightened star formation activity in the last 2100 Myr, one nonrepeating host shows this SFH as well. Our results support progenitor models with short delay channels (i.e., magnetars formed via core-collapse supernova) for most FRBs, but the presence of some FRBs in less-active environments suggests a fraction form through more delayed channels.

Published
2023

4. Discovery of an as-yet non-repeating fast radio burst with the hallmarks of a repeater

Author

Caleb, M, Driessen, L.N, Gordon, A.C, Tejos, N, Chibueze, J.O, Stappers, B.W, Rajwade, K.M, Cavallaro, F, Wang, Y, Kumar, P, Majid, W.A, Wharton, R.S, Naudet, C.J, Bezuidenhout, M.C, Jankowski, F, Malenta, M, Morello, V, Sanidas, S, Surnis, M.P, Barr, E.D, Chen, W, Kramer, M, Fong, W, Kilpatrick, C.D, Prochaska, J. Xavier, Simha, S, Venter, C, Heywood, I, Kundu, A, Schussler, F, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; We present the discovery of an apparently non-repeating Fast Radio Burst (FRB) with the MeerKAT radio interferometer in South Africa, as part of the MeerTRAP commensal project. FRB 20210410D with a dispersion measure DM = 578.78 +/- 2 pc/cc was detected in the incoherent beam of ~1.3 deg2 but was bright enough to be localised to sub-arcsec precision in the 2s images made from standard correlation data products. The localisation enabled the association of the FRB with an optical galaxy at z = 0.1415, which is inconsistent with what is expected from the Macquart scaling relation. We attribute the excess DM to the host galaxy. This is the first FRB that is not associated with a dwarf galaxy, to exhibit an excess DM. We do not detect any continuum radio emission at the FRB position or from the host galaxy down to a 3sigma RMS of 14.4 uJy/beam. The FRB is wide with a scattering time of 43.7 +/- 4.3 ms at 1 GHz, and exhibits bifurcation in the spectrum, both of which are reminiscent of repeating FRBs. Although this FRB has not been seen to repeat in 7.28 h at 1.3 GHz with MeerKAT, 3 h at 2.4 GHz with Murriyang and 5.7 h at simultaneous 2.3 GHz and 8.4 GHz observations with the Deep Space Network, we encourage further follow-up to establish a possible repeating nature.

Published
2023

5. Short GRB Host Galaxies. II. A Legacy Sample of Redshifts, Stellar Population Properties, and Implications for Their Neutron Star Merger Origins

Author

Nugent, A.E., Fong, W.-f., Dong, Y., Leja, J., Berger, E., Zevin, M., Chornock, R., Cobb, B.E., Kelley, L.Z., Kilpatrick, C.D., Levan, A.J., Margutti, R., Paterson, K., Perley, D., Escorial, A.R., Smith, N., Tanvir, N., Nugent, A.E., Fong, W.-f., Dong, Y., Leja, J., Berger, E., Zevin, M., Chornock, R., Cobb, B.E., Kelley, L.Z., Kilpatrick, C.D., Levan, A.J., Margutti, R., Paterson, K., Perley, D., Escorial, A.R., Smith, N., and Tanvir, N.

Abstract

Contains fulltext : 284949.pdf (Publisher’s version ) (Open Access)

Published
2022

6. A very luminous jet from the disruption of a star by a massive black hole

Author

Andreoni, I., Coughlin, M.W., Perley, D.A., Yao, Y., Lu, W., Cenko, S.B., Kumar, H., Anand, S., Ho, A.Y.Q., Kasliwal, M.M., Postigo, A. de Ugarte, Sagués-Carracedo, A., Schulze, S., Kann, D.A., Kulkarni, S.R., Sollerman, J., Tanvir, N., Rest, A., Izzo, L., Somalwar, J.J., Kaplan, D.L., Ahumada, T., Anupama, G.C., Auchettl, K., Barway, S., Bellm, E.C., Bhalerao, V., Bloom, J.S., Bremer, M., Bulla, M., Burns, E., Campana, S., Chandra, P., Charalampopoulos, P., Cooke, J., D’Elia, V., Das, K.K., Dobie, D., Fernández, J.F.A., Freeburn, J., Fremling, C., Gezari, S., Goode, S., Graham, M.J., Hammerstein, E., Karambelkar, V.R., Kilpatrick, C.D., Kool, E.C., Krips, M., Laher, R.R., Leloudas, G., Levan, A.J., Lundquist, M.J., Mahabal, A.A., Medford, M.S., Miller, M.C., Möller, A., Mooley, K.P., Nayana, A.J., Nir, G., Pang, P.T.H., Paraskeva, E., Perley, R.A., Petitpas, G., Pursiainen, M., Ravi, V., Ridden-Harper, R., Riddle, R., Rigault, M., Rodriguez, A.C., Rusholme, B., Sharma, Y., Smith, I.A., Stein, R.D., Thöne, C., Tohuvavohu, A., Valdes, F., Roestel, J. van, Vergani, S.D., Wang, Q., Zhang, J., Andreoni, I., Coughlin, M.W., Perley, D.A., Yao, Y., Lu, W., Cenko, S.B., Kumar, H., Anand, S., Ho, A.Y.Q., Kasliwal, M.M., Postigo, A. de Ugarte, Sagués-Carracedo, A., Schulze, S., Kann, D.A., Kulkarni, S.R., Sollerman, J., Tanvir, N., Rest, A., Izzo, L., Somalwar, J.J., Kaplan, D.L., Ahumada, T., Anupama, G.C., Auchettl, K., Barway, S., Bellm, E.C., Bhalerao, V., Bloom, J.S., Bremer, M., Bulla, M., Burns, E., Campana, S., Chandra, P., Charalampopoulos, P., Cooke, J., D’Elia, V., Das, K.K., Dobie, D., Fernández, J.F.A., Freeburn, J., Fremling, C., Gezari, S., Goode, S., Graham, M.J., Hammerstein, E., Karambelkar, V.R., Kilpatrick, C.D., Kool, E.C., Krips, M., Laher, R.R., Leloudas, G., Levan, A.J., Lundquist, M.J., Mahabal, A.A., Medford, M.S., Miller, M.C., Möller, A., Mooley, K.P., Nayana, A.J., Nir, G., Pang, P.T.H., Paraskeva, E., Perley, R.A., Petitpas, G., Pursiainen, M., Ravi, V., Ridden-Harper, R., Riddle, R., Rigault, M., Rodriguez, A.C., Rusholme, B., Sharma, Y., Smith, I.A., Stein, R.D., Thöne, C., Tohuvavohu, A., Valdes, F., Roestel, J. van, Vergani, S.D., Wang, Q., and Zhang, J.

Abstract

05 december 2022, Contains fulltext : 286062.pdf (Author’s version preprint ) (Open Access)

Published
2022

7. Short GRB Host Galaxies. I. Photometric and Spectroscopic Catalogs, Host Associations, and Galactocentric Offsets

Author

Fong, W.-f., Nugent, A.E., Dong, Y., Berger, E., Paterson, K., Chornock, R., Levan, A.J., Blanchard, P., Alexander, K.D., Andrews, J., Cobb, B.E., Cucchiara, A., Fox, D., Fryer, C.L., Gordon, A.C., Kilpatrick, C.D., Lunnan, R., Margutti, R., Miller, A., Milne, P., Nicholl, M., Perley, D., Rastinejad, J., Escorial, A.R., Schroeder, G., Smith, N., Tanvir, N., Terreran, G., Fong, W.-f., Nugent, A.E., Dong, Y., Berger, E., Paterson, K., Chornock, R., Levan, A.J., Blanchard, P., Alexander, K.D., Andrews, J., Cobb, B.E., Cucchiara, A., Fox, D., Fryer, C.L., Gordon, A.C., Kilpatrick, C.D., Lunnan, R., Margutti, R., Miller, A., Milne, P., Nicholl, M., Perley, D., Rastinejad, J., Escorial, A.R., Schroeder, G., Smith, N., Tanvir, N., and Terreran, G.

Abstract

Contains fulltext : 284948.pdf (Publisher’s version ) (Open Access)

Published
2022

8. A Radio-selected Population of Dark, Long Gamma-Ray Bursts: Comparison to the Long Gamma-Ray Burst Population and Implications for Host Dust Distributions

Author

Schroeder, G., Laskar, T., Fong, W.-f., Nugent, A.E., Berger, E., Chornock, R., Alexander, K.D., Andrews, J., Bussmann, R.S., Castro-Tirado, A.J., Goyal, A.V., Kilpatrick, C.D., Lally, M., Miller, A.A., Milne, P., Paterson, K., Escorial, A.R., Stroh, M.C., Terreran, G., Zauderer, B.A., Schroeder, G., Laskar, T., Fong, W.-f., Nugent, A.E., Berger, E., Chornock, R., Alexander, K.D., Andrews, J., Bussmann, R.S., Castro-Tirado, A.J., Goyal, A.V., Kilpatrick, C.D., Lally, M., Miller, A.A., Milne, P., Paterson, K., Escorial, A.R., Stroh, M.C., Terreran, G., and Zauderer, B.A.

Abstract

Contains fulltext : 284947.pdf (Publisher’s version ) (Open Access)

Published
2022

9. Probing Kilonova Ejecta Properties Using a Catalog of Short Gamma-Ray Burst Observations

Author

Rastinejad, J.C., Fong, W., Kilpatrick, C.D., Paterson, K., Tanvir, N.R., Levan, A.J., Nugent, A., Smith, Nathan, Rastinejad, J.C., Fong, W., Kilpatrick, C.D., Paterson, K., Tanvir, N.R., Levan, A.J., Nugent, A., and Smith, Nathan

Abstract

Contains fulltext : 235959.pdf (Publisher’s version ) (Closed access) Contains fulltext : 235959.pdf (Author’s version preprint ) (Open Access)

Published
2021

10. AT 2019qyl in NGC 300: Internal Collisions in the Early Outflow from a Very Fast Nova in a Symbiotic Binary

Author

Jencson, J.E., Andrews, J.E., Bond, H.E., Karambelkar, V., Sand, D.J., Dyk, S.D. van, Blagorodnova, N., Boyer, M.L., Kasliwal, M.M., Lau, R.M., Mohamed, S., Williams, R., Whitelock, P.A., Amaro, R.C., Bostroem, K.A., Dong, Y., Lundquist, M.J., Valenti, S., Wyatt, S.D., Burke, J., De, K., Jha, S.W., Johansson, J., Rojas-Bravo, C., Coulter, D.A., Foley, R.J., Gehrz, R.D., Haislip, J., Hiramatsu, D., Howell, D.A., Kilpatrick, C.D., Masci, F.J., McCully, C., Ngeow, C.-C., Pan, Y.-C., Pellegrino, C., Piro, A.L., Kouprianov, V., Reichart, D.E., Rest, A., Rest, S., Smith, N., Jencson, J.E., Andrews, J.E., Bond, H.E., Karambelkar, V., Sand, D.J., Dyk, S.D. van, Blagorodnova, N., Boyer, M.L., Kasliwal, M.M., Lau, R.M., Mohamed, S., Williams, R., Whitelock, P.A., Amaro, R.C., Bostroem, K.A., Dong, Y., Lundquist, M.J., Valenti, S., Wyatt, S.D., Burke, J., De, K., Jha, S.W., Johansson, J., Rojas-Bravo, C., Coulter, D.A., Foley, R.J., Gehrz, R.D., Haislip, J., Hiramatsu, D., Howell, D.A., Kilpatrick, C.D., Masci, F.J., McCully, C., Ngeow, C.-C., Pan, Y.-C., Pellegrino, C., Piro, A.L., Kouprianov, V., Reichart, D.E., Rest, A., Rest, S., and Smith, N.

Abstract

Contains fulltext : 239353p.pdf (Publisher’s version ) (Closed access) Contains fulltext : 239353.pdf (Author’s version preprint ) (Open Access)

Published
2021

11. Seventeen Tidal Disruption Events from the First Half of ZTF Survey Observations: Entering a New Era of Population Studies

Author

Velzen, S. van, Gezari, S., Hammerstein, E., Roth, N., Frederick, S., Ward, C., Hung, T., Cenko, S.B., Stein, R., Perley, D.A., Taggart, K., Foley, R.J., Sollerman, J., Blagorodnova, N., Andreoni, I., Bellm, E.C., Brinnel, V., De, K., Dekany, R., Feeney, M., Fremling, C., Giomi, M., Golkhou, V.Z., Graham, M.J., Ho, A.Y.Q., Kasliwal, M.M., Kilpatrick, C.D., Kulkarni, S.R., Kupfer, T., Laher, R.R., Mahabal, A., Masci, F.J., Miller, A.A., Nordin, J., Riddle, R., Rusholme, B., Santen, J.v., Sharma, Y., Shupe, D.L., Soumagnac, M.T., Velzen, S. van, Gezari, S., Hammerstein, E., Roth, N., Frederick, S., Ward, C., Hung, T., Cenko, S.B., Stein, R., Perley, D.A., Taggart, K., Foley, R.J., Sollerman, J., Blagorodnova, N., Andreoni, I., Bellm, E.C., Brinnel, V., De, K., Dekany, R., Feeney, M., Fremling, C., Giomi, M., Golkhou, V.Z., Graham, M.J., Ho, A.Y.Q., Kasliwal, M.M., Kilpatrick, C.D., Kulkarni, S.R., Kupfer, T., Laher, R.R., Mahabal, A., Masci, F.J., Miller, A.A., Nordin, J., Riddle, R., Rusholme, B., Santen, J.v., Sharma, Y., Shupe, D.L., and Soumagnac, M.T.

Abstract

Contains fulltext : 230757.pdf (publisher's version ) (Closed access) Contains fulltext : 230757pre.pdf (preprint version ) (Open Access)

Published
2021

12. A tidal disruption event coincident with a high-energy neutrino

Author

Stein, R., Velzen, S.V., Kowalski, M., Franckowiak, A., Gezari, S., Miller-Jones, James, Frederick, S., Sfaradi, I., Bietenholz, M.F., Horesh, A., Fender, R., Garrappa, S., Ahumada, T., Andreoni, I., Belicki, J., Bellm, E.C., Böttcher, M., Brinnel, V., Burruss, R., Cenko, S.B., Coughlin, M.W., Cunningham, V., Drake, A., Farrar, G.R., Feeney, M., Foley, R.J., Gal-Yam, A., Golkhou, V.Z., Goobar, A., Graham, M.J., Hammerstein, E., Helou, G., Hung, T., Kasliwal, M.M., Kilpatrick, C.D., Kong, A.K.H., Kupfer, T., Laher, R.R., Mahabal, A.A., Masci, F.J., Necker, J., Nordin, J., Perley, D.A., Rigault, M., Reusch, S., Rodriguez, H., Rojas-Bravo, C., Rusholme, B., Shupe, D.L., Singer, L.P., Sollerman, J., Soumagnac, M.T., Stern, D., Taggart, K., van Santen, J., Ward, C., Woudt, P., Yao, Y., Stein, R., Velzen, S.V., Kowalski, M., Franckowiak, A., Gezari, S., Miller-Jones, James, Frederick, S., Sfaradi, I., Bietenholz, M.F., Horesh, A., Fender, R., Garrappa, S., Ahumada, T., Andreoni, I., Belicki, J., Bellm, E.C., Böttcher, M., Brinnel, V., Burruss, R., Cenko, S.B., Coughlin, M.W., Cunningham, V., Drake, A., Farrar, G.R., Feeney, M., Foley, R.J., Gal-Yam, A., Golkhou, V.Z., Goobar, A., Graham, M.J., Hammerstein, E., Helou, G., Hung, T., Kasliwal, M.M., Kilpatrick, C.D., Kong, A.K.H., Kupfer, T., Laher, R.R., Mahabal, A.A., Masci, F.J., Necker, J., Nordin, J., Perley, D.A., Rigault, M., Reusch, S., Rodriguez, H., Rojas-Bravo, C., Rusholme, B., Shupe, D.L., Singer, L.P., Sollerman, J., Soumagnac, M.T., Stern, D., Taggart, K., van Santen, J., Ward, C., Woudt, P., and Yao, Y.

Abstract

Cosmic neutrinos provide a unique window into the otherwise hidden mechanism of particle acceleration in astrophysical objects. The IceCube Collaboration recently reported the likely association of one high-energy neutrino with a flare from the relativistic jet of an active galaxy pointed towards the Earth. However a combined analysis of many similar active galaxies revealed no excess from the broader population, leaving the vast majority of the cosmic neutrino flux unexplained. Here we present the likely association of a radio-emitting tidal disruption event, AT2019dsg, with a second high-energy neutrino. AT2019dsg was identified as part of our systematic search for optical counterparts to high-energy neutrinos with the Zwicky Transient Facility. The probability of finding any coincident radio-emitting tidal disruption event by chance is 0.5%, while the probability of finding one as bright in bolometric energy flux as AT2019dsg is 0.2%. Our electromagnetic observations can be explained through a multizone model, with radio analysis revealing a central engine, embedded in a UV photosphere, that powers an extended synchrotron-emitting outflow. This provides an ideal site for petaelectronvolt neutrino production. Assuming that the association is genuine, our observations suggest that tidal disruption events with mildly relativistic outflows contribute to the cosmic neutrino flux.

Published
2021

13. Host Galaxy Properties and Offset Distributions of Fast Radio Bursts: Implications for Their Progenitors

Author

Heintz, K.E., Prochaska, J.X., Simha, S., Platts, E., Fong, W.F., Tejos, N., Ryder, S.D., Aggerwal, K., Bhandari, S., Day, C.K., Deller, A.T., Kilpatrick, C.D., Law, C.J., Macquart, Jean-Pierre, Mannings, A., Marnoch, L.J., Sadler, E.M., Shannon, Ryan, Heintz, K.E., Prochaska, J.X., Simha, S., Platts, E., Fong, W.F., Tejos, N., Ryder, S.D., Aggerwal, K., Bhandari, S., Day, C.K., Deller, A.T., Kilpatrick, C.D., Law, C.J., Macquart, Jean-Pierre, Mannings, A., Marnoch, L.J., Sadler, E.M., and Shannon, Ryan

Abstract

We present observations and detailed characterizations of five new host galaxies of fast radio bursts (FRBs) discovered with the Australian Square Kilometre Array Pathfinder (ASKAP) and localized to ≲1″. Combining these galaxies with FRB hosts from the literature, we introduce criteria based on the probability of chance coincidence to define a subsample of 10 highly confident associations (at z = 0.03-0.52), 3 of which correspond to known repeating FRBs. Overall, the FRB-host galaxies exhibit a broad, continuous range of color (M u - M r = 0.9-2.0), stellar mass (M ∗ = 108 - 6 × 1010 M o˙), and star formation rate (SFR = 0.05-10 M o˙ yr-1) spanning the full parameter space occupied by z < 0.5 galaxies. However, they do not track the color-magnitude, SFR-M ∗, nor BPT diagrams of field galaxies surveyed at similar redshifts. There is an excess of "green valley"galaxies and an excess of emission-line ratios indicative of a harder radiation field than that generated by star formation alone. From the observed stellar mass distribution, we rule out the hypothesis that FRBs strictly track stellar mass in galaxies (>99% c.l.). We measure a median offset of 3.3 kpc from the FRB to the estimated center of the host galaxies and compare the host-burst offset distribution and other properties with the distributions of long- and short-duration gamma-ray bursts (LGRBs and SGRBs), core-collapse supernovae (CC-SNe), and SNe Ia. This analysis rules out galaxies hosting LGRBs (faint, star-forming galaxies) as common hosts for FRBs (>95% c.l.). Other transient channels (SGRBs, CC-, and SNe Ia) have host-galaxy properties and offsets consistent with the FRB distributions. All of the data and derived quantities are made publicly available on a dedicated website and repository.

Published
2020

14. The SPIRITS Sample of Luminous Infrared Transients: Uncovering Hidden Supernovae and Dusty Stellar Outbursts in Nearby Galaxies

Author

Jencson, J.E., Kasliwal, M.M., Adams, S.M., Bond, H.E., De, K., Johansson, J., Karambelkar, V., Lau, R.M., Tinyanont, S., Ryder, S.D., Cody, A.M., Masci, F.J., Bally, J., Blagorodnova, N., Castellon, S., Fremling, C., Gehrz, R.D., Helou, G., Kilpatrick, C.D., Milne, P.A., Morrell, N., Perley, D.A., Phillips, M.M., Smith, N., Dyk, S.D. van, Williams, R.E., Jencson, J.E., Kasliwal, M.M., Adams, S.M., Bond, H.E., De, K., Johansson, J., Karambelkar, V., Lau, R.M., Tinyanont, S., Ryder, S.D., Cody, A.M., Masci, F.J., Bally, J., Blagorodnova, N., Castellon, S., Fremling, C., Gehrz, R.D., Helou, G., Kilpatrick, C.D., Milne, P.A., Morrell, N., Perley, D.A., Phillips, M.M., Smith, N., Dyk, S.D. van, and Williams, R.E.

Abstract

Contains fulltext : 234300.pdf (Publisher’s version ) (Closed access) Contains fulltext : 234300.pdf (Author’s version preprint ) (Open Access), We present a systematic study of the most luminous (MIR [Vega magnitudes] brighter than -14) infrared (IR) transients discovered by the SPitzer InfraRed Intensive Transients Survey (SPIRITS) between 2014 and 2018 in nearby galaxies (D<35Mpc). The sample consists of nine events that span peak IR luminosities of M[4.5],peak between -14 and -18.2, show IR colors between 0.2<([3.6]-[4.5])<3.0, and fade on timescales between 55d12) show multiple, luminous IR outbursts over several years and have directly detected, massive progenitors in archival imaging. With analyses of extensive, multiwavelength follow-up, we suggest the following possible classifications: five obscured core-collapse supernovae (CCSNe), two erupting massive stars, one luminous red nova, and one intermediate-luminosity red transient. We define a control sample of all optically discovered transients recovered in SPIRITS galaxies and satisfying the same selection criteria. The control sample consists of eight CCSNe and one Type Iax SN. We find that 7 of the 13 CCSNe in the SPIRITS sample have lower bounds on their extinction of 2

Published
2019

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