Pulsars, transients and relativistic astrophysics

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Upgraded GMRT survey for pulsars in globular clusters. I: Discovery of a millisecond binary pulsar in NGC 6652

(2022)

Authors:

T Gautam, A Ridolfi, Pcc Freire, Rs Wharton, Y Gupta, Sm Ransom, Ls Oswald, M Kramer, Me DeCesar
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Photometric and spectroscopic evolution of the interacting transient AT 2016jbu(Gaia16cfr)

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 513:4 (2022) 5642-5665

Authors:

SJ Brennan, M Fraser, J Johansson, A Pastorello, R Kotak, HF Stevance, T-W Chen, JJ Eldridge, S Bose, PJ Brown, E Callis, R Cartier, M Dennefeld, Subo Dong, P Duffy, N Elias-Rosa, G Hosseinzadeh, E Hsiao, H Kuncarayakti, A Martin-Carrillo, B Monard, A Nyholm, G Pignata, D Sand, BJ Shappee, SJ Smartt, BE Tucker, L Wyrzykowski, H Abbot, S Benetti, J Bento, S Blondin, Ping Chen, A Delgado, L Galbany, M Gromadzki, CP Gutiérrez, L Hanlon, DL Harrison, D Hiramatsu, ST Hodgkin, TW-S Holoien, DA Howell, C Inserra, E Kankare, S Kozłowski, TE Müller-Bravo, K Maguire, C McCully, P Meintjes, N Morrell, M Nicholl, D O’Neill, P Pietrukowicz, R Poleski, JL Prieto, A Rau, DE Reichart, T Schweyer, M Shahbandeh, J Skowron, J Sollerman, I Soszyński, MD Stritzinger, M Szymański, L Tartaglia, A Udalski, K Ulaczyk, DR Young, M van Leeuwen, B van Soelen
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Progenitor, environment, and modelling of the interacting transient AT 2016jbu (Gaia16cfr)

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 513:4 (2022) 5666-5685

Authors:

SJ Brennan, M Fraser, J Johansson, A Pastorello, R Kotak, HF Stevance, T-W Chen, JJ Eldridge, S Bose, PJ Brown, E Callis, R Cartier, M Dennefeld, Subo Dong, P Duffy, N Elias-Rosa, G Hosseinzadeh, E Hsiao, H Kuncarayakti, A Martin-Carrillo, B Monard, G Pignata, D Sand, BJ Shappee, SJ Smartt, BE Tucker, L Wyrzykowski, H Abbot, S Benetti, J Bento, S Blondin, Ping Chen, A Delgado, L Galbany, M Gromadzki, CP Gutiérrez, L Hanlon, DL Harrison, D Hiramatsu, ST Hodgkin, TW-S Holoien, DA Howell, C Inserra, E Kankare, S Kozłowski, TE Müller-Bravo, K Maguire, C McCully, P Meintjes, N Morrell, M Nicholl, D O’Neill, P Pietrukowicz, R Poleski, JL Prieto, A Rau, DE Reichart, T Schweyer, M Shahbandeh, J Skowron, J Sollerman, I Soszyński, MD Stritzinger, M Szymański, L Tartaglia, A Udalski, K Ulaczyk, DR Young, M van Leeuwen, B van Soelen
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VLBI observations of GRB 201015A, a relatively faint GRB with a hint of Very High Energy gamma-ray emission

(2022)

Authors:

S Giarratana, L Rhodes, B Marcote, R Fender, G Ghirlanda, M Giroletti, L Nava, JM Paredes, ME Ravasio, M Ribo, M Patel, J Rastinejad, G Schroeder, W Fong, BP Gompertz, AJ Levan, P O'Brien
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Looking at the distant universe with the MeerKAT array: discovery of a luminous OH megamaser at z > 0.5

Astrophysical Journal Letters IOP Science 931:1 (2022) L7

Authors:

Marcin Glowacki, Jordan D Collier, Amir Kazemi-Moridani, Bradley Frank, Hayley Roberts, Jeremy Darling, Hans-Rainer Kloeckner, Nathan Adams, Andrew J Baker, Matthew Bershady, Tariq Blecher, Sarah-Louise Blyth, Rebecca Bowler, Barbara Catinella, Laurent Chemin, Steven M Crawford, Catherine Cress, Romeel Dave, Roger Deane, Erwin de Blok, Jacinta Delhaize, Kenneth Duncan, Ed Elson, Sean February, Eric Gawiser, Peter Hatfield, Julia Healy, Patricia Henning, Kelley M Hess, Ian Heywood, Benne W Holwerda, Munira Hoosain, John P Hughes, Zackary L Hutchens, Matt Jarvis, Sheila Kannappan, Neal Katz, Dusan Keres, Marie Korsaga, Renee C Kraan-Korteweg, Philip Lah, Michelle Lochner, Natasha Maddox, Sphesihle Makhathini, Gerhardt R Meurer, Martin Meyer, Danail Obreschkow, Se-Heon Oh, Tom Oosterloo

Abstract:

In the local universe, OH megamasers (OHMs) are detected almost exclusively in infrared-luminous galaxies, with a prevalence that increases with IR luminosity, suggesting that they trace gas-rich galaxy mergers. Given the proximity of the rest frequencies of OH and the hyperfine transition of neutral atomic hydrogen (H i), radio surveys to probe the cosmic evolution of H i in galaxies also offer exciting prospects for exploiting OHMs to probe the cosmic history of gas-rich mergers. Using observations for the Looking At the Distant Universe with the MeerKAT Array (LADUMA) deep H i survey, we report the first untargeted detection of an OHM at z > 0.5, LADUMA J033046.20-275518.1 (nicknamed "Nkalakatha"). The host system, WISEA J033046.26-275518.3, is an infrared-luminous radio galaxy whose optical redshift z ≈ 0.52 confirms the MeerKAT emission-line detection as OH at a redshift z OH = 0.5225 ± 0.0001 rather than H i at lower redshift. The detected spectral line has 18.4σ peak significance, a width of 459 ± 59 km s-1, and an integrated luminosity of (6.31 ± 0.18 [statistical] ± 0.31 [systematic]) × 103 L ⊙, placing it among the most luminous OHMs known. The galaxy's far-infrared luminosity L FIR = (1.576 ±0.013) × 1012 L ⊙ marks it as an ultraluminous infrared galaxy; its ratio of OH and infrared luminosities is similar to those for lower-redshift OHMs. A comparison between optical and OH redshifts offers a slight indication of an OH outflow. This detection represents the first step toward a systematic exploitation of OHMs as a tracer of galaxy growth at high redshifts.
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