The Square Kilometre Array (SKA)

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Understanding mechanical feedback from HERGs and LERGs

ArXiv 1810.06899 (2018)
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A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary

Science American Association for the Advancement of Science 362:6411 (2018) 201-206

Authors:

K De, MM Kasliwal, EO Ofek, TJ Moriya, J Burke, Y Cao, SB Cenko, GB Doran, GE Duggan, Robert Fender, C Fransson, A Gal-Yam, A Horesh, Kulkarni, RR Laher, R Lunnan, I Manulis, F Masci, PA Mazzali, PE Nugent, DA Perley, T Petrushevska, AL Piro, C Rumsey, J Sollerman, M Sullivan, F Taddia

Abstract:

Compact neutron star binary systems are produced from binary massive stars through stellar evolution involving up to two supernova explosions. The final stages in the formation of these systems have not been directly observed. We report the discovery of iPTF 14gqr (SN 2014ft), a type Ic supernova with a fast-evolving light curve indicating an extremely low ejecta mass (≈0.2 solar masses) and low kinetic energy (≈2 × 1050 ergs). Early photometry and spectroscopy reveal evidence of shock cooling of an extended helium-rich envelope, likely ejected in an intense pre-explosion mass-loss episode of the progenitor. Taken together, we interpret iPTF 14gqr as evidence for ultra-stripped supernovae that form neutron stars in compact binary systems.
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Tracking the variable jets of V404 Cygni during its 2015 outburst

(2018)

Authors:

AJ Tetarenko, GR Sivakoff, JCA Miller-Jones, M Bremer, KP Mooley, RP Fender, C Rumsey, A Bahramian, D Altamirano, S Heinz, D Maitra, SB Markoff, S Migliari, MP Rupen, DM Russell, TD Russell, CL Sarazin
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A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary

(2018)

Authors:

K De, MM Kasliwal, EO Ofek, TJ Moriya, J Burke, Y Cao, SB Cenko, GB Doran, GE Duggan, RP Fender, C Fransson, A Gal-Yam, A Horesh, SR Kulkarni, RR Laher, R Lunnan, I Manulis, F Masci, PA Mazzali, PE Nugent, DA Perley, T Petrushevska, AL Piro, C Rumsey, J Sollerman, M Sullivan, F Taddia
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LOFAR Discovery of a 23.5 s Radio Pulsar

The Astrophysical Journal American Astronomical Society 866:1 (2018) 54

Authors:

CM Tan, CG Bassa, S Cooper, TJ Dijkema, P Esposito, JWT Hessels, VI Kondratiev, M Kramer, D Michilli, S Sanidas, TW Shimwell, BW Stappers, J van Leeuwen, I Cognard, J-M Grießmeier, A Karastergiou, EF Keane, C Sobey, P Weltevrede
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