Results 91 to 100 of about 15,813 (253)

Multiwavelength Evidence for Two New Candidate Transitional Millisecond Pulsars in the Subluminous Disk State: 4FGL J0639.1-8009 and 4FGL J1824.2+1231

The Astrophysical Journal
We report the discovery of two new Galactic accreting compact objects consistent with the respective positions of the unassociated Fermi-LAT γ -ray sources 4FGL J0639.1-8009 and 4FGL J1824.2+1231. A combination of new and archival X-ray data from Chandra,
Rebecca Kyer, Subhroja Roy, Jay Strader, Ryan Urquhart, Isabella Molina, Peter Craig, Laura Chomiuk   +6 more
doaj   +1 more source

Eight new MSPs in NGC 6440 and NGC 6441

, 2007
We report the discovery of five new millisecond pulsars in the globular cluster NGC 6440 and three new ones in NGC 6441; each cluster has one previously known pulsar. Four of the new pulsars are found in binary systems.
A. Cumming, C. Bassa, Fernando Camilo, Ingrid H. Stairs, Jason W. T. Hessels, Lucille H. Frey, Paulo C. C. Freire, Scott M. Ransom, Steve Bégin, V. M. Kaspi, Z. Wang   +10 more
core   +1 more source

Timing of Millisecond Pulsars in NGC 6752. III. On the Presence of Nonluminous Matter in the Cluster’s Core

The Astrophysical Journal
Millisecond pulsars are subject to accelerations in globular clusters (GCs) that manifest themselves in both the first and second spin period time derivatives, and can be used to explore the mass distribution of the potentials they inhabit.
A. Corongiu, A. Ridolfi, F. Abbate, M. Bailes, A. Possenti, M. Geyer, R. N. Manchester, M. Kramer, P. C. C. Freire, M. Burgay, S. Buchner, F. Camilo   +11 more
doaj   +1 more source

Accretion-powered millisecond pulsars [PDF]

Advances in Space Research, 2006
I review X-ray observations of accretion-powered millisecond pulsars and current theories for formation of their spectra and pulse profiles.
openaire   +3 more sources

Pulse Jitter and Single-pulse Variability in Millisecond Pulsars

The Astrophysical Journal
Understanding the jitter noise resulting from single-pulse phase and shape variations is important for the detection of gravitational waves using pulsar timing arrays.
S. Q. Wang, N. Wang, J. B. Wang, G. Hobbs, H. Xu, B. J. Wang, S. Dai, S. J. Dang, D. Li, Y. Feng, C. M. Zhang   +10 more
doaj   +1 more source

Exploring Unusual High-frequency Eclipses in MSP J1908+2105

The Astrophysical Journal
This paper presents a comprehensive study of the eclipse properties of the spider millisecond pulsar (MSP) J1908+2105, using wide-band observations from the uGMRT and Parkes UWL. For the first time, we observed that this pulsar exhibits extended eclipses
Ankita Ghosh, Bhaswati Bhattacharyya, Sangita Kumari, Simon Johnston, Patrick Weltevrede, Jayanta Roy   +5 more
doaj   +1 more source

Pulsar Results with the Fermi Large Area Telescope

, 2010
The launch of the Fermi Gamma-ray Space Telescope has heralded a new era in the study of gamma-ray pulsars. The population of confirmed gamma-ray pulsars has gone from 6-7 to more than 60, and the superb sensitivity of the Large Area Telescope (LAT) on ...
A Pellizzoni, AK Harding, AKH Kong, AM Chandler, C Venter, DA Smith, DJ Champion, F Aharonian, F Camilo, F Crawford, G Hobbs, GB Hobbs, I Yadigaroglu, JP Halpern, JP Halpern, JP Halpern, KP Watters, L Kuiper, M Kramer, M Ziegler, MJ Keith, MSE Roberts, RC Hartman, RW Romani, SA Story, TC Weekes, V Ravi, VM Kaspi, WB Atwood, WB Atwood, X Bai, ZJ Jiang   +31 more
core   +1 more source

The Anomalous Acceleration of PSR J2043+1711: Long-period Orbital Companion or Stellar Flyby?

The Astrophysical Journal
Based on the rate of change of its orbital period, PSR J2043+1711 has a substantial peculiar acceleration of 3.5 ± 0.8 mm s ^–1 yr ^–1 , which deviates from the acceleration predicted by equilibrium Milky Way (MW) models at a 4 σ level.
Thomas Donlon II, Sukanya Chakrabarti, Michael T. Lam, Daniel Huber, Daniel Hey, Enrico Ramirez-Ruiz, Benjamin Shappee, David L. Kaplan, Gabriella Agazie, Akash Anumarlapudi, Anne M. Archibald, Zaven Arzoumanian, Paul T. Baker, Paul R. Brook, H. Thankful Cromartie, Kathryn Crowter, Megan E. DeCesar, Paul B. Demorest, Timothy Dolch, Elizabeth C. Ferrara, William Fiore, Emmanuel Fonseca, Gabriel E. Freedman, Nate Garver-Daniels, Peter A. Gentile, Joseph Glaser, Deborah C. Good, Jeffrey S. Hazboun, Mark Huber, Ross J. Jennings, Megan L. Jones, Matthew Kerr, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Alexander McEwen, Maura A. McLaughlin, Natasha McMann, Bradley W. Meyers, Cherry Ng, David J. Nice, Timothy T. Pennucci, Benetge B. P. Perera, Nihan S. Pol, Henri A. Radovan, Scott M. Ransom, Paul S. Ray, Ann Schmiedekamp, Carl Schmiedekamp, Brent J. Shapiro-Albert, Ingrid H. Stairs, Kevin Stovall, Abhimanyu Susobhanan, Joseph K. Swiggum, Michael A. Tucker, Haley M. Wahl   +55 more
doaj   +1 more source

Millisecond Pulsars, their Evolution and Applications [PDF]

Journal of Astrophysics and Astronomy, 2017
Has appeared in Journal of Astrophysics and Astronomy special issue on 'Physics of Neutron Stars and Related Objects', celebrating the 75th birth-year of G ...
openaire   +4 more sources

Radio Pulse Search from Aql X-1

The Astrophysical Journal
We present 12 observations of the accreting millisecond X-ray pulsar Aql X-1, taken from 2022 August to 2023 October using the Five-hundred-meter Aperture Spherical Radio Telescope at 1250 MHz.
Long Peng, Zhaosheng Li, Yuanyue Pan, Shanshan Weng, Wenming Yan, Na Wang, Bo-Jun Wang, Shuangqiang Wang   +7 more
doaj   +1 more source