On the Deepest Search for
#GalacticCenter Pulsars and an Examination of an Intriguing
#MillisecondPulsar Candidate:
https://iopscience.iop.org/article/10.3847/1538-4357/ae336c -> Discovery of a Possible
#Pulsar in the Milky Way’s Center:
https://news.columbia.edu/news/researchers-announce-discovery-possible-pulsar-milky-ways-center - confirming a pulsar star would enable unprecedented tests of General Relativity. Such a discovery would revolutionize physics.
On the Deepest Search for Galactic Center Pulsars and an Examination of an Intriguing Millisecond Pulsar Candidate
On the Deepest Search for Galactic Center Pulsars and an Examination of an Intriguing Millisecond Pulsar Candidate, Perez, Karen I., Gajjar, Vishal, Bogdanov, Slavko, Halpern, Jules P., Demorest, Paul B., Croft, Steve, Lebofsky, Matt, MacMahon, David H. E., Siemion, Andrew P. V.
A glitch in the millisecond pulsar J0900-3144:
https://arxiv.org/abs/2511.11336 -> With only two prior glitches recorded across four decades, this is only the third such event in the
#MillisecondPulsar population, detected across multiple pulsar timing array observations:
https://www.spaceaustralia.com/news/new-glitch-millisecond-pulsar
A glitch in the millisecond pulsar J0900$-$3144
We report the detection of a glitch in the millisecond pulsar (MSP) PSR J0900$-$3144, which is included in the European, MeerKAT and Parkes pulsar timing array experiments. The dataset combines observations from the MeerKAT, Nançay, Lovell, and Murriyang telescopes, spanning a total baseline of approximately 14 years. The glitch occurred on MJD~59942(17), with a measured fractional spin frequency step of $Δν_g / ν=1.15(13) \times 10^{-12}$. This event represents the third glitch detected in a MSP, following those in PSRs B1821$-$24A and J0613$-$0200. Although smaller in amplitude than the previous two, the glitch in PSR J0900$-$3144 is of a comparable order of magnitude. The updated MSP glitch rate is $2.5(1)\times 10^{-3}$ glitches per pulsar per year, which suggests it is likely current PTAs will detect another MSP glitch within five years. Using simulations, we demonstrate that such small glitches can go undetected, especially in short datasets such as those from new PTAs, and can bias the inferred achromatic noise model parameters, potentially leading to the down-weighting of the pulsar in gravitational wave background searches.
💫 Comment un pulsar milliseconde a trompé les astronomes pendant des années ?
Les étoiles à neutrons, ces cadavres stellaires ultra-denses, continuent de surprendre les scientifiques. Une équipe...
Daniel Fischer
AlcorNews