Pulsars, transients and relativistic astrophysics

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Constraints on axionlike particles from a combined analysis of three flaring Fermi flat-spectrum radio quasars

Physical Review D American Physical Society 107:8 (2023) 83027

Authors:

James Davies, Manuel Meyer, Garret Cotter

Abstract:

Many theories beyond the Standard Model of particle physics predict the existence of axionlike particles (ALPs) that mix with photons in the presence of a magnetic field. Searching for the effects of ALP-photon mixing in gamma-ray observations of blazars has provided some of the strongest constraints on ALP parameter space so far. Previously, only individual sources have been analyzed. We perform a combined analysis on Fermi Large Area Telescope data of three bright flaring flat-spectrum radio quasars, with the blazar jets themselves as the dominant mixing region. For the first time, we include a full treatment of photon-photon dispersion within the jet and account for the uncertainty in our B-field model by leaving the field strength free in the fitting. Overall, we find no evidence for ALPs but are able to exclude the ALP parameters 5 neV≲ma≲200 neV and gaγ≳5×10-12 GeV-1 with 95% confidence.
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Mass measurements and 3D orbital geometry of PSR J1933$-$6211

(2023)

Authors:

M Geyer, V Venkatraman Krishnan, PCC Freire, M Kramer, J Antoniadis, M Bailes, MCI Bernadich, S Buchner, AD Cameron, DJ Champion, A Karastergiou, MJ Keith, ME Lower, S Osłowski, A Possenti, A Parthasarathy, DJ Reardon, M Serylak, RM Shannon, R Spiewak, W van Straten, JPW Verbiest
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IXPE Observations of the Quintessential Wind-accreting X-Ray Pulsar Vela X-1

The Astrophysical Journal Letters American Astronomical Society 947:2 (2023) l20

Authors:

Sofia V Forsblom, Juri Poutanen, Sergey S Tsygankov, Matteo Bachetti, Alessandro Di Marco, Victor Doroshenko, Jeremy Heyl, Fabio La Monaca, Christian Malacaria, Herman L Marshall, Fabio Muleri, Alexander A Mushtukov, Maura Pilia, Daniele Rogantini, Valery F Suleimanov, Roberto Taverna, Fei Xie, Iván Agudo, Lucio A Antonelli, Luca Baldini, Wayne H Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolò Di Lalla, Immacolata Donnarumma, Michal Dovčiak, Steven R Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A Garcia, Shuichi Gunji, Kiyoshi Hayashida, Wataru Iwakiri, Svetlana G Jorstad, Philip Kaaret, Vladimir Karas, Takao Kitaguchi, Jeffery J Kolodziejczak, Henric Krawczynski, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Alan P Marscher, Giorgio Matt, Ikuyuki Mitsuishi, Tsunefumi Mizuno, Michela Negro, Chi-Yung Ng, Stephen L O’Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G Pavlov, Abel L Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Andrea Possenti, Simonetta Puccetti, Brian D Ramsey, John Rankin, Ajay Ratheesh, Oliver J Roberts, Roger W Romani, Carmelo Sgrò, Patrick Slane, Paolo Soffitta, Gloria Spandre, Rashid A Sunyaev, Douglas A Swartz, Toru Tamagawa, Fabrizio Tavecchio, Yuzuru Tawara, Allyn F Tennant, Nicholas E Thomas, Francesco Tombesi, Alessio Trois, Roberto Turolla, Jacco Vink, Martin C Weisskopf, Kinwah Wu, Silvia Zane
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Search for the evaporation of primordial black holes with H.E.S.S.

Journal of Cosmology and Astroparticle Physics IOP Publishing 2023:04 (2023) 040

Authors:

F Aharonian, F Ait Benkhali, J Aschersleben, M Böttcher, M Backes, V Barbosa Martins, R Batzofin, Y Becherini, D Berge, B Bi, C Boisson, J Bolmont, M de Bony de Lavergne, J Borowska, F Bradascio, R Brose, F Brun, B Bruno, T Bulik, C Burger-Scheidlin, S Caroff, S Casanova, J Celic, M Cerruti, T Chand, A Chen, O Chibueze, G Cotter, J Damascene Mbarubucyeye, A Djannati-Ataï, K Egberts, C van Eldik, J-P Ernenwein, M Füßling, A Fiasson, G Fichet de Clairfontaine, G Fontaine, S Gabici, S Ghafourizadeh, G Giavitto, D Glawion, JF Glicenstein, G Grolleron, M-H Grondin, L Haerer, M Haupt, JA Hinton, W Hofmann, M Holler, D Horns, Z-Q Huang, M Jamrozy, F Jankowsky, V Joshi, I Jung-Richardt, E Kasai, K Katarzyński, B Khélifi, S Klepser, W Kluźniak, N Komin, K Kosack, D Kostunin, TL Holch, RG Lang, S Le Stum, F Leitl, A Lemière, J-P Lenain, F Leuschner, T Lohse, A Luashvili, I Lypova, J Mackey, D Malyshev, V Marandon, P Marchegiani, P Marinos, G Martí-Devesa, R Marx, A Mitchell, R Moderski, L Mohrmann, A Montanari, E Moulin, J Muller, K Nakashima, M de Naurois, J Niemiec, P O'Brien, S Ohm, L Olivera-Nieto, E de Ona Wilhelmi, M Ostrowski, G Pühlhofer, S Panny, M Panter, RD Parsons, G Peron, A Priyana Noel, DA Prokhorov, H Prokoph, M Punch, A Quirrenbach, P Reichherzer, O Reimer, F Rieger, G Rowell, B Rudak, H Rueda Ricarte, V Sahakian, H Salzmann, DA Sanchez, A Santangelo, M Sasaki, HM Schutte, U Schwanke, JNS Shapopi, H Sol, A Specovius, S Spencer, Ł Stawarz, R Steenkamp, S Steinmassl, C Steppa, I Sushch, H Suzuki, T Takahashi, T Tanaka, T Tavernier, C Thorpe-Morgan, N Tsuji, Y Uchiyama, M Vecchi, J Veh, C Venter, J Vink, SJ Wagner, R White, A Wierzcholska, YW Wong, M Zacharias, D Zargaryan, AA Zdziarski, A Zech, S Zouari, N Żywucka, The HESS collaboration
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The Black Hole Candidate Swift J1728.9–3613 and the Supernova Remnant G351.9–0.9

The Astrophysical Journal American Astronomical Society 947:1 (2023) 38

Authors:

Mayura Balakrishnan, Paul A Draghis, Jon M Miller, Joe Bright, Robert Fender, Mason Ng, Edward Cackett, Andrew Fabian, Kip Kuntz, James CA Miller-Jones, Daniel Proga, Paul S Ray, John Raymond, Mark Reynolds, Abderahmen Zoghbi
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