Relativistic ejecta from stellar mass black holes: insights from simulations and synthetic radio images

(2025)

Authors:

Katie Savard, James H Matthews, Rob Fender, Ian Heywood

The H.E.S.S. extragalactic sky survey with the first decade of observations

(2025)

Authors:

HESS Collaboration, F Aharonian, F Ait Benkhali, J Aschersleben, H Ashkar, M Backes, V Barbosa Martins, R Batzofin, Y Becherini, D Berge, K Bernl枚hr, M B枚ttcher, C Boisson, J Bolmont, M de Bony de Lavergne, J Borowska, M Bouyahiaoui, F Bradascio, R Brose, A Brown, F Brun, B Bruno, T Bulik, C Burger-Scheidlin, T Bylund, S Casanova, J Celic, M Cerruti, T Chand, S Chandra, A Chen, J Chibueze, O Chibueze, G Cotter, P Cristofari, J Damascene Mbarubucyeye, ID Davids, J Devin, J Djuvsland, A Dmytriiev, K Egberts, S Einecke, S Fegan, G Fontaine, S Funk, S Gabici, JF Glicenstein, J Glombitza, P Goswami, G Grolleron, L Haerer, B He脽, JA Hinton, W Hofmann, TL Holch, M Holler, D Horns, Zhiqiu Huang, M Jamrozy, F Jankowsky, A Jardin-Blicq, E Kasai, K Katarzy艅ski, R Khatoon, B Kh茅lifi, Nu Komin, K Kosack, D Kostunin, A Kundu, RG Lang, S Le Stum, A Lemi猫re, M Lemoine-Goumard, J-P Lenain, F Leuschner, A Luashvili, J Mackey, D Malyshev, V Marandon, G Mart铆-Devesa, R Marx, A Mehta, A Mitchell, R Moderski, L Mohrmann, A Montanari, M de Naurois, J Niemiec, P O'Brien, L Olivera-Nieto, E de Ona Wilhelmi, M Ostrowski, S Panny, M Panter, U Pensec, G P眉hlhofer, M Punch, A Quirrenbach, S Ravikularaman, M Regeard, A Reimer, O Reimer, I Reis, H Ren, B Reville, F Rieger, G Rowell, B Rudak, E Ruiz-Velasco, V Sahakian, H Salzmann, DA Sanchez, A Santangelo, M Sasaki, J Sch盲fer, F Sch眉ssler, JNS Shapopi, A Sharma, H Sol, S Spencer, 艁 Stawarz, R Steenkamp, S Steinmassl, C Steppa, H Suzuki, T Takahashi, T Tanaka, AM Taylor, R Terrier, A Thakur, M Tsirou, C van Eldik, M Vecchi, C Venter, J Vink, HJ V枚lk, T Wach, SJ Wagner, A Wierzcholska, M Zacharias, AA Zdziarski, A Zech, N 呕ywucka

MeerKAT discovers a jet-driven bow shock near GRS 1915+105. How an invisible large-scale jet sculpts a microquasar's environment

(2025)

Authors:

SE Motta, P Atri, James H Matthews, Jakob van den Eijnden, Rob P Fender, James CA Miller-Jones, Ian Heywood, Patrick Woudt

Quantifying jet-interstellar medium interactions in Cyg X-1: Insights from dual-frequency bow shock detection with MeerKAT

(2025)

Authors:

P Atri, SE Motta, Jakob van den Eijnden, James H Matthews, James CA Miller-Jones, Rob Fender, David Williams-Baldwin, Ian Heywood, Patrick Woudt

The Thousand-Pulsar-Array programme on MeerKAT鈥揦VI. Mapping the Galactic magnetic field with pulsar observations

Monthly Notices of the Royal Astronomical Society 91探花 University Press 540:3 (2025) 2112-2130

Authors:

LS Oswald, P Weltevrede, B Posselt, S Johnston, A Karastergiou, ME Lower

Abstract:

Measuring the magnetic field of the Milky Way reveals the structure and evolution of the Galaxy. Pulsar rotation measures (RMs) provide a means to probe this Galactic magnetic field (GMF) in three dimensions. We use the largest single-origin data set of pulsar measurements, from the MeerKAT Thousand-Pulsar-Array, to map out GMF components parallel to pulsar lines of sight. We also present these measurements for easy integration into the consolidated RM catalogue, RMTable. Focusing on the Galactic disc, we investigate competing theories of how the GMF relates to the spiral arms, comparing our observational map with five analytic models of magnetic field structure. We also analyse RMs to extragalactic radio sources, to help build-up a three-dimensional picture of the magnetic structure of the Galaxy. In particular, our large number of measurements allows us to investigate differing magnetic field behaviour in the upper and lower halves of the Galactic plane. We find that the GMF is best explained as following the spiral arms in a roughly bisymmetric structure, with antisymmetric parity with respect to the Galactic plane. This picture is complicated by variations in parity on different spiral arms, and the parity change location appears to be shifted by a distance of 0.15 kpc perpendicular to the Galactic plane. This indicates a complex relationship between the large-scale distributions of matter and magnetic fields in our Galaxy. Future pulsar discoveries will help reveal the origins of this relationship with greater precision, as well as probing the locations of local magnetic field inhomogenities.