Pulsars, transients and relativistic astrophysics

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Gas pile-up, gap overflow, and Type 1.5 migration in circumbinary disks: general theory

(2012)

Authors:

Bence Kocsis, Zoltan Haiman, Abraham Loeb
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MULTI-WAVELENGTH OBSERVATIONS OF THE RADIO MAGNETAR PSR J1622–4950 AND DISCOVERY OF ITS POSSIBLY ASSOCIATED SUPERNOVA REMNANT

The Astrophysical Journal American Astronomical Society 751:1 (2012) 53

Authors:

Gemma E Anderson, BM Gaensler, Patrick O Slane, Nanda Rea, David L Kaplan, Bettina Posselt, Lina Levin, Simon Johnston, Stephen S Murray, Crystal L Brogan, Matthew Bailes, Samuel Bates, Robert A Benjamin, ND Ramesh Bhat, Marta Burgay, Sarah Burke-Spolaor, Deepto Chakrabarty, Nichi D'Amico, Jeremy J Drake, Paolo Esposito, Jonathan E Grindlay, Jaesub Hong, GL Israel, Michael J Keith, Michael Kramer, T Joseph W Lazio, Julia C Lee, Jon C Mauerhan, Sabrina Milia, Andrea Possenti, Ben Stappers, Danny TH Steeghs
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Relativistic kinetic equation for Compton scattering of polarized radiation in a strong magnetic field

Physical Review D American Physical Society (APS) 85:10 (2012) 103002

Authors:

Alexander A Mushtukov, Dmitrij I Nagirner, Juri Poutanen
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An ultraviolet-optical flare from the tidal disruption of a helium-rich stellar core

(2012)

Authors:

S Gezari, R Chornock, A Rest, ME Huber, K Forster, E Berger, PJ Challis, JD Neill, DC Martin, T Heckman, A Lawrence, C Norman, G Narayan, RJ Foley, GH Marion, D Scolnic, L Chomiuk, A Soderberg, K Smith, RP Kirshner, AG Riess, SJ Smartt, CW Stubbs, JL Tonry, WM Wood-Vasey, WS Burgett, KC Chambers, T Grav, JN Heasley, N Kaiser, R-P Kudritzki, EA Magnier, JS Morgan, PA Price
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The X-ray luminous cluster underlying the z = 1.04 quasar PKS1229-021

Monthly Notices of the Royal Astronomical Society 422:1 (2012) 590-599

Authors:

HR Russell, AC Fabian, GB Taylor, JS Sanders, KM Blundell, CS Crawford, RM Johnstone, E Belsole

Abstract:

We present a 100ks Chandra observation studying the extended X-ray emission around the powerful z= 1.04 quasar PKS1229-021. The diffuse cluster X-ray emission can be traced out to ∼15arcsec (∼120kpc) radius and there is a drop in the calculated hardness ratio inside the central 5arcsec consistent with the presence of a cool core. Radio observations of the quasar show a strong core and a bright, one-sided jet leading to the south-west hotspot and a second hotspot visible on the counter-jet side. Although the wings of the quasar point spread function (PSF) provided a significant contribution to the total X-ray flux at all radii where the extended cluster emission was detected, we were able to accurately subtract the PSF emission using Chandra Ray Tracer and marx simulations. The resulting steep cluster surface brightness profile for PKS1229-021 appears similar to the profile for the FR II (Fanaroff-Riley class II) radio galaxy 3C444, which has a similarly rapid surface brightness drop caused by a powerful shock surrounding the radio lobes. Using a model surface brightness profile based on 3C444, we estimated the total cluster luminosity for PKS1229-021 to be. We discuss the difficulty of detecting cool-core clusters, which host bright X-ray sources, in high redshift surveys. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
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