Pulsars, transients and relativistic astrophysics

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The very-faint X-ray binary IGR J17062-6143: a truncated disk, no pulsations and a possible outflow

ArXiv 1712.03949 (2017)

Authors:

J van den Eijnden, N Degenaar, C Pinto, A Patruno, K Wette, C Messenger, JV Hernandez Santisteban, R Wijnands, JM Miller, D Altamirano, F Paerels, D Chakrabarty, AC Fabian
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A precise measurement of the magnetic field in the corona of the black hole binary V404 Cygni

Science American Association for the Advancement of Science 358:6368 (2017)

Authors:

Y Dallilar, SS Eikenberry, A Garner, RD Stelter, A Gottlieb, P Gandhi, P Casella, VS Dhillon, TR Marsh, SP Littlefair, L Hardy, Robert Fender, Kunal Mooley, DJ Walton, F Fuerst, M Bachetti, AJ Castro-Tirado, M Charcos, ML Edwards, NM Lasso-Cabrera, A Marin-Franch, K Ackley, JG Bennett, AJ Cenarro, B Chinn, HV Donoso, R Frommeyer, K Hanna, J Julian, P Miller, S Mullin, CH Murphey, C Packham, F Varosi, C Vega, C Warner, AN Ramaprakash, M Burse, S Punnadi, P Chordia, A Gerarts, H De Paz Martín, MM Calero, R Scarpa, SF Acosta, B Siegel, FF Pérez

Abstract:

Observations of binary stars containing an accreting black hole or neutron star often show x-ray emission extending to high energies (>10 kilo--electron volts), which is ascribed to an accretion disk corona of energetic particles akin to those seen in the solar corona. Despite their ubiquity, the physical conditions in accretion disk coronae remain poorly constrained. Using simultaneous infrared, optical, x-ray, and radio observations of the Galactic black hole system V404 Cygni, showing a rapid synchrotron cooling event in its 2015 outburst, we present a precise 461 ± 12 gauss magnetic field measurement in the corona. This measurement is substantially lower than previous estimates for such systems, providing constraints on physical models of accretion physics in black hole and neutron star binary systems.
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On the rate of black hole binary mergers in galactic nuclei due to dynamical hardening

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Oxford University Press (OUP) 474:4 (2017) 5672-5683

Authors:

Nwc Leigh, Am Geller, B McKernan, Kes Ford, M-M Mac Low, J Bellovary, Z Haiman, W Lyra, J Samsing, M O'Dowd, B Kocsis, S Endlich
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Observations of the GRB Afterglow ATLAS17aeu and Its Possible Association with GW 170104

The Astrophysical Journal American Astronomical Society 850:2 (2017) 149

Authors:

B Stalder, J Tonry, SJ Smartt, M Coughlin, KC Chambers, CW Stubbs, T-W Chen, E Kankare, KW Smith, L Denneau, A Sherstyuk, A Heinze, H Weiland, A Rest, DR Young, ME Huber, H Flewelling, T Lowe, EA Magnier, ASB Schultz, C Waters, R Wainscoat, M Willman, DE Wright, J Chu, D Sanders, C Inserra, K Maguire, R Kotak
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A population of highly energetic transient events in the centres of active galaxies

Nature Astronomy Springer Nature 1:12 (2017) 865-871

Authors:

E Kankare, R Kotak, S Mattila, P Lundqvist, MJ Ward, M Fraser, A Lawrence, SJ Smartt, WPS Meikle, A Bruce, J Harmanen, SJ Hutton, C Inserra, T Kangas, A Pastorello, T Reynolds, C Romero-Cañizales, KW Smith, S Valenti, KC Chambers, KW Hodapp, ME Huber, N Kaiser, R-P Kudritzki, EA Magnier, JL Tonry, RJ Wainscoat, C Waters
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