Pulsar preprints for 21-07-2026

"Imaging X-ray Polarimetry Explorer"
Brian Ramsey (NASA-MSFC), Paolo Soffitta (INAF-IAPS), Martin C. Weisskopf (NASA-MSFC)
"Beyond Spin: QCD Magnetars"
Rachid Ouyed (Department of Physics,Astronomy, University of Calgary, Alberta, Canada)
"Probing the emission geometry of the X-ray pulsar 2S 1417$-$624 during a weak outburst with NICER, IXPE, and NuSTAR"
Menglei Zhou, Pengju Wang, Honghui Liu, Lorenzo Ducci, Sergey S. Tsygankov, Qingchang Zhao, Juri Poutanen, Long Ji, Valery F. Suleimanov, Alexander A. Mushtukov, Qi Liu, Camille M. Diez, Luis Abalo, Victoria Grinberg, Andrea Santangelo
"XRISM/Resolve observations of Hercules X-1: a pulsating, highly broadened Fe K emission line from the neutron star accretion column"
Peter Kosec, Laura Brenneman, Erin Kara, Ciro Pinto, Daniele Rogantini, Rudiger Staubert, Dominic Walton, Francesco Barra, Andrew Fabian, Teruaki Enoto, Jon M. Miller, Takuto Narita, Koh Sakamoto, Yutaro Nagai
"Biased Domain Wall Networks and their Gravitational Waves"
Davide Barbini, Alessio Notari, Oriol Pujol\`as, Fabrizio Rompineve, Francisco Torrent\'i
"Circular polarization of gravitational waves from magnetorotational supernovae"
Shota Shibagaki, Tomoya Takiwaki, Kei Kotake, Takami Kuroda, Tobias Fischer
"Reconstructions of Horndeski Subclasses by Gaussian Processes"
Marco C. Mendoza Marcos, Ana A. Avilez Lopez
"The impact of physically motivated calibration errors on search pipeline detection parameters for broadband burst Signals"
Milan Wils (KU Leuven, Leuven Gravity Institute, Department of Physics and Astronomy, Leuven, Belgium), Brad Ratto (Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, USA, Los Alamos National Laboratory, Los Alamos, USA), Jeffrey S. Kissel (LIGO Hanford Observatory, Richland, USA), Tjonnie G. F. Li (KU Leuven, Leuven Gravity Institute, Department of Physics and Astronomy, Leuven, Belgium, KU Leuven, Leuven Gravity Institute, Department of Electrical Engineering), Marek J. Szczepa\'nczyk (Faculty of Physics, University of Warsaw, Warszawa, Poland), Gabriele Vedovato (INFN, Sezione di Padova, Padova, Italy), Michele Zanolin (Embry-Riddle Aeronautical University, Prescott, USA)
"Stable mass transfer in massive binaries leading to merging black holes"
Xiao-Tian Xu, Norbert Langer, Jakub Klencki, Chen Wang, Xiang-Dong Li
"Binary White Dwarfs as Gravitational Wave Sources for LISA"
Sreeta Roy, Surajit Kalita, Tomasz Bulik, Dorota Gondek-Rosi\'nska
"Observable signature of magnetic tidal coupling in hierarchical triple systems"
Marta Cocco, Gianluca Grignani, Troels Harmark, Marta Orselli, Davide Panella, Daniele Pica
"Establishing Compactness as a Population Observable in Gravitational-Wave Astronomy"
Shrobana Ghosh, Charlie Hoy, Mark Hannam, Frank Ohme
"Detectability of Gravitational-wave counterparts of EP-FXTs observed during the O4b LIGO-Virgo-KAGRA Observing Run"
Ansh Chopra, Samuele Ronchini, Biswajit Banerjee, Marica Branchesi, Stefano Ascenzi, Maria Edvige Ravasio, Peter Jonker, Andrew Levan
"Hybrid stars among mass gap objects are excluded by twin stars at $1.4\,M_\odot$"
Alexander Ayriyan, David Blaschke, Marcin Dubaj, Oleksandr Vitiuk, Adrian Wojcik
"CW Cas: A solar-type contact binary system with an unseen third companion in a hierarchical quadruple system"
Matekov Azizbek, Zhu Liying, Li Linjia, Meng Fangbin, Liu Nianping, Qian ShengBang, Zhao Ergang, Kovalev Mikhail, Wang Jiangjiao, Chen Yufei, Hafizov Aktam, Boonrucksar Soonthornthum, Rattanasoon Somsawat, Ehgamberdiev Shuhrat
"Strangeon Ergostars"
Haojia Xia, Shichuan Chen, Hong-Bo Li, Enping Zhou, Ren-Xin Xu
"Rapidly Rotating Neutron Star Collapse in Massive Scalar-Tensor Theories"
Jos\'e Carlos Olvera M., Daniela D. Doneva, Pablo Cerd\'a-Dur\'an, Jos\'e A. Font, Stoytcho S. Yazadjiev