Results 81 to 90 of about 121,901 (271)

Glitches in Southern Pulsars [PDF]

International Astronomical Union Colloquium, 2000
AbstractParkes timing observations of 31 mostly young pulsars over nearly nine years are described. A total of 29 glitches were detected, of which 19 are previously unreported. Twelve glitches were seen in PSR J1341–6220, making this the most frequently glitching pulsar known, and the largest known glitch was detected in PSR J1614–5047.
R. Pace, Ben Stappers, Victoria M. Kaspi, Victoria M. Kaspi, Andrew Lyne, Richard N. Manchester, Na Wang, Na Wang, Matthew Bailes   +8 more
openaire   +8 more sources

Application of the Gaussian mixture model in pulsar astronomy -- pulsar classification and candidates ranking for {\it Fermi} 2FGL catalog

, 2012
Machine learning, algorithms to extract empirical knowledge from data, can be used to classify data, which is one of the most common tasks in observational astronomy.
Abdo, Ackermann, Bhattacharya, D. J. Champion, Eatough, Espinoza, Espinoza, Fasano, K. J. Lee, Kassam, L. Guillemot, Lin, Lyne, M. Kramer, Manchester, Nolan, Peacock, Press, Shklovskii, Tauris, Theodoridis, Weltevrede, Y. L. Yue   +22 more
core   +1 more source

Properties and observability of glitches and anti-glitches in accreting pulsars [PDF]

, 2015
Several glitches have been observed in young, isolated radio pulsars, while a clear detection in accretion-powered X-ray pulsars is still lacking. We use the Pizzochero snowplow model for pulsar glitches as well as starquake models to determine for the ...
Doroshenko, V., Ducci, L., Ferrigno, C., Mereghetti, S., Pizzochero, P. M., Santangelo, A.   +5 more
core   +3 more sources

Isolated Neutron Stars as Science Validation for XMM2ATHENA: Ensuring Robust Data for Future X‐Ray Astronomy

Astronomische Nachrichten, EarlyView.
ABSTRACT The discovery of radio‐quiet, x‐ray thermally emitting isolated neutron stars (XINSs) in the ROSAT All‐Sky Survey revealed a previously overlooked component of the neutron star population. Advancements in x‐ray instrumentation and the availability of deep, wide‐area optical surveys now enable us to explore XINSs at fainter x‐ray fluxes and ...
Adriana Mancini Pires, Christian Motch, Axel Schwope, Iris Traulsen, Jean Ballet, Sudip Chakraborty, David Homan, Jan Kurpas, Ada Nebot Gomez‐Moràn, François‐Xavier Pineau, Hugo Tranin, Natalie Webb   +11 more
wiley   +1 more source

The search for statistical anisotropy in the gravitational-wave background with pulsar timing arrays

The Open Journal of Astrophysics, 2019
Pulsar-timing arrays (PTAs) are seeking gravitational waves from supermassive-black-hole binaries, and there are prospects to complement these searches with stellar-astrometry measurements.
Selim Can Hotinli, Marc Kamionkowski, Andrew H. Jaffe   +2 more
doaj   +1 more source

The Contribution of Fermi Gamma-Ray Pulsars to the local Flux of Cosmic-Ray Electrons and Positrons

, 2010
We analyze the contribution of gamma-ray pulsars from the first Fermi-Large Area Telescope (LAT) catalogue to the local flux of cosmic-ray electrons and positrons (e+e-).
A.A. Abdo ., A.G. Muslimov, A.K. Harding, D. Hooper, EGRET Team collaboration, F.A. Aharonian, Fermi LAT collaboration, Fermi LAT collaboration, J.K. Daugherty, J.M. Cordes, K. Hirotani, K.P. Watters, L. Zhang, Leo Gendelev, M.D. Kistler, Michael Dormody, R.N. Manchester, R.N. Manchester, S. Profumo, Stefano Profumo, V.V. Usov, X. Chi   +21 more
core   +1 more source

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

Astronomische Nachrichten, EarlyView.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source

ARECIBO PULSAR SURVEY USING ALFA. IV. MOCK SPECTROMETER DATA ANALYSIS, SURVEY SENSITIVITY, AND THE DISCOVERY OF 40 PULSARS [PDF]

, 2015
The on-going Arecibo Pulsar-ALFA (PALFA) survey began in 2004 and is searching for radio pulsars in the Galactic plane at 1.4 GHz. Here we present a comprehensive description of one of its main data reduction pipelines that is based on the PRESTO ...
P. Lazarus, A. Brazier, J. Hessels, J. Hessels, C. Karako-Argaman, V. Kaspi, R. Lynch, R. Lynch, E. Madsen, C. Patel, S. Ransom, P. Scholz, J. Swiggum, Weiwei Zhu, B. Allen, S. Bogdanov, F. Camilo, F. Cardoso, S. Chatterjee, J. Cordes, F. Crawford, J. Deneva, R. Ferdman, P. Freire, F. Jenet, B. Knispel, Kejia Lee, J. V. Leeuwen, J. V. Leeuwen, D. Lorimer, A. Lyne, M. Mclaughlin, X. Siemens, L. Spitler, I. Stairs, K. Stovall, A. Venkataraman   +36 more
semanticscholar   +1 more source

Millisecond pulsar velocities [PDF]

Monthly Notices of the Royal Astronomical Society, 1999
We present improved timing parameters for 13 millisecond pulsars (MSPs), including nine new proper motion measurements. These new proper motions bring to 23 the number of MSPs with measured transverse velocities. In light of these new results we present and compare the kinematic properties of MSPs with those of ordinary pulsars.
Ben Stappers, Shrinivas R. Kulkarni, S. B. Anderson, Maurizio Toscano, Maurizio Toscano, J. S. Sandhu, M. C. Britton, Richard N. Manchester, Richard N. Manchester, Matthew Bailes   +9 more
openaire   +6 more sources

FAST Discovery of Eight Isolated Millisecond Pulsars in NGC 6517

The Astrophysical Journal Letters
We present the discovery of eight isolated millisecond pulsars in globular cluster (GC) NGC 6517 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST).
Dejiang Yin, Li-yun Zhang, Lei Qian, Ralph P. Eatough, Baoda Li, Duncan R. Lorimer, Yinfeng Dai, Yaowei Li, Xingnan Zhang, Minghui Li, Tianhao Su, Yuxiao Wu, Yu Pan, Yujie Lian, Tong Liu, Zhen Yan, Zhichen Pan   +16 more
doaj   +1 more source