The Square Kilometre Array (SKA)

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The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole

(2022)

Authors:

Dheeraj R Pasham, Matteo Lucchini, Tanmoy Laskar, Benjamin P Gompertz, Shubham Srivastav, Matt Nicholl, Stephen J Smartt, James CA Miller-Jones, Kate D Alexander, Rob Fender, Graham P Smith, Michael D Fulton, Gulab Dewangan, Keith Gendreau, Eric R Coughlin, Lauren Rhodes, Assaf Horesh, Sjoert van Velzen, Itai Sfaradi, Muryel Guolo, N Castro Segura, Aysha Aamer, Joseph P Anderson, Iair Arcavi, Sean J Brennan, Kenneth Chambers, Panos Charalampopoulos, Ting-Wan Chen, A Clocchiatti, Thomas de Boer, Michel Dennefeld, Elizabeth Ferrara, Lluis Galbany, Hua Gao, James H Gillanders, Adelle Goodwin, Mariusz Gromadzki, M Huber, Peter G Jonker, Manasvita Joshi, Erin Kara, Thomas L Killestein, Peter Kosec, Daniel Kocevski, Giorgos Leloudas, Chien-Cheng Lin, Raffaella Margutti, Seppo Mattila, Thomas Moore, Tomas Muller-Bravo, Chow-Choong Ngeow, Samantha Oates, Francesca Onori, Yen-Chen Pan, Miguel Perez-Torres, Priyanka Rani, Ronald Remillard, Evan J Ridley, Steve Schulze, Xinyue Sheng, Luke Shingles, Ken W Smith, James Steiner, Richard Wainscoat, Thomas Wevers, Sheng Yang
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Comprehensive coverage of particle acceleration and kinetic feedback from the stellar mass black hole V404 Cygni

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 518:1 (2022) 1243-1259

Authors:

RP Fender, KP Mooley, SE Motta, JS Bright, DRA Williams, AP Rushton, RJ Beswick, JCA Miller-Jones, M Kimura, K Isogai, T Kato
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The Thousand-Pulsar-Array program on MeerKAT -- IX. The time-averaged properties of the observed pulsar population

(2022)

Authors:

B Posselt, A Karastergiou, S Johnston, A Parthasarathy, LS Oswald, RA Main, A Basu, MJ Keith, X Song, P Weltevrede, C Tiburzi, M Bailes, S Buchner, M Geyer, M Kramer, R Spiewak, V Venkatraman Krishnan
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The LOFAR Tied-Array All-Sky Survey: Timing of 35 radio pulsars and an overview of the properties of the LOFAR pulsar discoveries

(2022)

Authors:

E van der Wateren, CG Bassa, S Cooper, J-M Grießmeier, BW Stappers, JWT Hessels, VI Kondratiev, D Michilli, CM Tan, C Tiburzi, P Weltevrede, A-S Bak Nielsen, TD Carozzi, B Ciardi, I Cognard, R-J Dettmar, A Karastergiou, M Kramer, J Künsemöller, S Osłowski, M Serylak, C Vocks, O Wucknitz
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MIGHTEE: deep 1.4 GHz source counts and the sky temperature contribution of star forming galaxies and active galactic nuclei

Monthly Notices of the Royal Astronomical Society Oxford University Press 520:2 (2022) 2668-2691

Authors:

Cl Hale, Ih Whittam, Mj Jarvis, Pn Best, Nl Thomas, I Heywood, M Prescott, N Adams, J Afonso, Fangxia An, Raa Bowler, Jd Collier, Rhw Cook, R Davé, Bs Frank, M Glowacki, Pw Hatfield, S Kolwa, Cc Lovell, N Maddox, L Marchetti, Lk Morabito, E Murphy, I Prandoni, Z Randriamanakoto, Ar Taylor

Abstract:

We present deep 1.4 GHz source counts from ∼5 deg2 of the continuum Early Science data release of the MeerKAT International Gigahertz Tiered Extragalactic Exploration (MIGHTEE) survey down to S1.4GHz ∼15 μJy. Using observations over two extragalactic fields (COSMOS and XMM-LSS), we provide a comprehensive investigation into correcting the incompleteness of the raw source counts within the survey to understand the true underlying source count population. We use a variety of simulations that account for: errors in source detection and characterisation, clustering, and variations in the assumed source model used to simulate sources within the field and characterise source count incompleteness. We present these deep source count distributions and use them to investigate the contribution of extragalactic sources to the sky background temperature at 1.4 GHz using a relatively large sky area. We then use the wealth of ancillary data covering a subset of the COSMOS field to investigate the specific contributions from both active galactic nuclei (AGN) and star forming galaxies (SFGs) to the source counts and sky background temperature. We find, similar to previous deep studies, that we are unable to reconcile the sky temperature observed by the ARCADE 2 experiment. We show that AGN provide the majority contribution to the sky temperature contribution from radio sources, but the relative contribution of SFGs rises sharply below 1 mJy, reaching an approximate 15-25 per cent contribution to the total sky background temperature (Tb ∼100 mK) at ∼15 μJy.
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