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A challenge to the standard cosmological model

Astrophysical Journal Letters (2022)

Authors:

Nathan Secrest, Sebastian VON HAUSEGGER, Mohamed Rameez, Roya Mohayaee, Subir Sarkar
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Discovery of a radio emitting neutron star with an ultra-long spin period of 76 seconds

(2022)

Authors:

Manisha Caleb, Ian Heywood, Kaustubh Rajwade, Mateusz Malenta, Benjamin Stappers, Ewan Barr, Weiwei Chen, Vincent Morello, Sotiris Sanidas, Jakob van den Eijnden, Michael Kramer, David Buckley, Jaco Brink, Sara Elisa Motta, Patrick Woudt, Patrick Weltevrede, Fabian Jankowski, Mayuresh Surnis, Sarah Buchner, Mechiel Christiaan Bezuidenhout, Laura Nicole Driessen, Rob Fender
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A Multiwavelength Study of GRS 1716-249 in Outburst: Constraints on Its System Parameters

The Astrophysical Journal American Astronomical Society 932:1 (2022) 38

Authors:

Payaswini Saikia, David M Russell, MC Baglio, DM Bramich, Piergiorgio Casella, Maria Diaz Trigo, Poshak Gandhi, Jiachen Jiang, Thomas Maccarone, Roberto Soria, Hind Al Noori, Aisha Al Yazeedi, Kevin Alabarta, Tomaso Belloni, Marion Cadolle Bel, Chiara Ceccobello, Stéphane Corbel, Rob Fender, Elena Gallo, Jeroen Homan, Karri Koljonen, Fraser Lewis, Sera B Markoff, James CA Miller-Jones, Jerome Rodriguez, Thomas D Russell, Tariq Shahbaz, Gregory R Sivakoff, Vincenzo Testa, Alexandra J Tetarenko
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Improved search for invisible modes of nucleon decay in water with the SNO+detector

Physical Review D American Physical Society (APS) 105:11 (2022) 112012

Authors:

A Allega, MR Anderson, S Andringa, M Askins, DJ Auty, A Bacon, N Barros, F Barão, R Bayes, EW Beier, TS Bezerra, A Bialek, SD Biller, E Blucher, E Caden, EJ Callaghan, S Cheng, M Chen, O Chkvorets, B Cleveland, D Cookman, J Corning, MA Cox, R Dehghani, C Deluce, MM Depatie, J Dittmer, KH Dixon, F Di Lodovico, E Falk, N Fatemighomi, R Ford, K Frankiewicz, A Gaur, OI González-Reina, D Gooding, C Grant, J Grove, AL Hallin, D Hallman, J Hartnell, WJ Heintzelman, RL Helmer, J Hu, R Hunt-Stokes, SMA Hussain, AS Inácio, CJ Jillings, T Kaptanoglu, P Khaghani, H Khan, JR Klein, LL Kormos, B Krar, C Kraus, CB Krauss, T Kroupová, I Lam, BJ Land, I Lawson, L Lebanowski, J Lee, C Lefebvre, J Lidgard, YH Lin, V Lozza, M Luo, A Maio, S Manecki, J Maneira, RD Martin, N McCauley, AB McDonald, M Meyer, C Mills, I Morton-Blake, S Naugle, LJ Nolan, HM O’Keeffe, GD Orebi Gann, J Page, W Parker, J Paton, SJM Peeters, L Pickard, P Ravi, A Reichold, S Riccetto, R Richardson, M Rigan, J Rose, J Rumleskie, I Semenec, P Skensved, M Smiley, R Svoboda, B Tam, J Tseng, E Turner, S Valder, JGC Veinot, CJ Virtue, E Vázquez-Jáuregui, J Wang, M Ward, JJ Weigand, JD Wilson, JR Wilson, A Wright, JP Yanez, S Yang, M Yeh, S Yu, T Zhang, Y Zhang, K Zuber, A Zummo
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Discovery of a radio-emitting neutron star with an ultra-long spin period of 76 s

Nature Astronomy Springer Nature 6:7 (2022) 828-836

Authors:

Manisha Caleb, Ian Heywood, Kaustubh Rajwade, Mateusz Malenta, Benjamin Stappers, Ewan Barr, Weiwei Chen, Vincent Morello, Sotiris Sanidas, Jakob van den Eijnden, Michael Kramer, David Buckley, Jaco Brink, Sara Elisa Motta, Patrick Woudt, Patrick Weltevrede, Fabian Jankowski, Mayuresh Surnis, Sarah Buchner, Mechiel Christiaan Bezuidenhout, Laura Nicole Driessen, Rob Fender

Abstract:

The radio-emitting neutron star population encompasses objects with spin periods ranging from milliseconds to tens of seconds. As they age and spin more slowly, their radio emission is expected to cease. We present the discovery of an ultra-long period radio-emitting neutron star, PSR J0901-4046, with spin properties distinct from the known spin and magnetic-decay powered neutron stars. With a spin-period of 75.88 s, a characteristic age of 5.3 Myr, and a narrow pulse duty-cycle, it is uncertain how radio emission is generated and challenges our current understanding of how these systems evolve. The radio emission has unique spectro-temporal properties such as quasi-periodicity and partial nulling that provide important clues to the emission mechanism. Detecting similar sources is observationally challenging, which implies a larger undetected population. Our discovery establishes the existence of ultra-long period neutron stars, suggesting a possible connection to the evolution of highly magnetized neutron stars, ultra-long period magnetars, and fast radio bursts.
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