Pulsars, transients and relativistic astrophysics

Research group

Research theme

Sub department

About

Physical constraints from near-infrared fast photometry of the black-hole transient GX 339-4

(2019)

Authors:

FM Vincentelli, P Casella, P Petrucci, T Maccarone, D Russell, P Uttley, B De Marco, R Fender, P Gandhi, J Malzac, K O'Brien, J Tomsick

Spectrophotometric templates for core-collapse supernovae and their application in simulations of time-domain surveys

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 489:4 (2019) 5802-5821

Authors:

M Vincenzi, M Sullivan, RE Firth, CP Guti茅rrez, C Frohmaier, M Smith, C Angus, RC Nichol

GBTrans: a commensal search for radio pulses with the Green Bank 20-m telescope

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 489:3 (2019) 4001-4006

Authors:

Golnoosh Golpayegani, Duncan R Lorimer, Steven W Ellingson, Devansh Agarwal, Olivia Young, Frank Ghigo, Richard Prestage, Kaustubh Rajwade, Maura A McLaughlin, Michael Mingyar

Hierarchical Black Hole Mergers in Active Galactic Nuclei.

Physical review letters American Physical Society (APS) 123:18 (2019) ARTN 181101

Authors:

Y Yang, I Bartos, V Gayathri, Kes Ford, Z Haiman, S Klimenko, B Kocsis, S M谩rka, Z M谩rka, B McKernan, R O'Shaughnessy

Abstract:

The origins of the stellar-mass black hole mergers discovered by LIGO/Virgo are still unknown. Here we show that if migration traps develop in the accretion disks of active galactic nuclei (AGNs) and promote the mergers of their captive black holes, the majority of black holes within disks will undergo hierarchical mergers-with one of the black holes being the remnant of a previous merger. 40% of AGN-assisted mergers detected by LIGO/Virgo will include a black hole with mass ≳50M_{⊙}, the mass limit from stellar core collapse. Hierarchical mergers at traps in AGNs will exhibit black hole spins (anti)aligned with the binary's orbital axis, a distinct property from other hierarchical channels. Our results suggest, although not definitively (with odds ratio of ∼1), that LIGO's heaviest merger so far, GW170729, could have originated from this channel.

SN 2017gmr: An Energetic Type II-P Supernova with Asymmetries

The Astrophysical Journal American Astronomical Society 885:1 (2019)

Authors:

Jennifer E Andrews, DJ Sand, S Valenti, Nathan Smith, Raya Dastidar, DK Sahu, Kuntal Misra, Avinash Singh, D Hiramatsu, PJ Brown, G Hosseinzadeh, S Wyatt, J Vinko, GC Anupama, I Arcavi, Chris Ashall, S Benetti, Marco Berton, KA Bostroem, M Bulla, J Burke, S Chen, L Chomiuk, A Cikota, E Congiu, B Cseh, Scott Davis, N Elias-Rosa, T Faran, Morgan Fraser, L Galbany, C Gall, A Gal-Yam, Anjasha Gangopadhyay, M Gromadzki, J Haislip, DA Howell, EY Hsiao, C Inserra, E Kankare, H Kuncarayakti, V Kouprianov, Brajesh Kumar, Xue Li, Han Lin, K Maguire, P Mazzali, C McCully, P Milne, Jun Mo, N Morrell, M Nicholl, P Ochner, F Olivares, A Pastorello, F Patat, M Phillips, G Pignata, S Prentice, A Reguitti, DE Reichart, 脫 Rodr铆guez, Liming Rui, Pankaj Sanwal, K S谩rneczky, M Shahbandeh, Mridweeka Singh, S Smartt, J Strader, MD Stritzinger, R Szak谩ts, L Tartaglia, Huijuan Wang, Lingzhi Wang, Xiaofeng Wang, JC Wheeler, Danfeng Xiang, O Yaron, DR Young, Junbo Zhang