Results 81 to 90 of about 777,035 (267)

Gravity experiments with radio pulsars

open access: yesLiving Reviews in Relativity
The discovery of the first pulsar in a binary star system, the Hulse–Taylor pulsar, 50 years ago opened up an entirely new field of experimental gravity.
Paulo C. C. Freire, Norbert Wex
doaj   +1 more source

The Major Role of Eccentricity in the Evolution of Colliding Pulsar-Stellar Winds

open access: yesUniverse, 2021
Binary systems that host a massive star and a non-accreting pulsar can be powerful non-thermal emitters. The relativistic pulsar wind and the non-relativistic stellar outflows interact along the orbit, producing ultrarelativistic particles that radiate ...
Maxim V. Barkov, Valenti Bosch-Ramon
doaj   +1 more source

Black hole/pulsar binaries in the Galaxy [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society: Letters, 2018
ABSTRACT We have performed population synthesis calculation on the formation of binaries containing a black hole (BH) and a neutron star (NS) in the Galactic disc. Some of important input parameters, especially for the treatment of common envelope evolution, are updated in the calculation.
Yong Shao, Xiang-Dong Li
openaire   +2 more sources

Optical and Infrared Lightcurve Modeling of the Gamma-ray Millisecond Pulsar 2FGL J2339.6-0532 [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2013
We report the detection of a quasi-sinusoidally modulated optical flux with a period of 4.6343 hour in the optical and infrared band of the Fermi source 2FGL J2339.7-0531.
Tzu-Ching Yen   +5 more
doaj   +1 more source

MICROARCSECOND VLBI PULSAR ASTROMETRY WITH PSRπ. I. TWO BINARY MILLISECOND PULSARS WITH WHITE DWARF COMPANIONS [PDF]

open access: yes, 2016
Model-independent distance constraints to binary millisecond pulsars (MSPs) are of great value to both the timing observations of the radio pulsars and multiwavelength observations of their companion stars.
A. Deller   +11 more
semanticscholar   +1 more source

Modulated Gamma-ray emission from compact millisecond pulsar binary systems

open access: yes, 2013
A significant amount of the millisecond pulsars has been discovered within binary systems. In several such binary systems the masses of the companion stars have been derived allowing to distinguish two classes of objects, called the Black Widow and the ...
Bednarek, W.
core   +1 more source

NuSTAR observations and broadband spectral energy distribution modeling of the millisecond pulsar binary PSR J1023+0038 [PDF]

open access: yes, 2014
We report the first hard X-ray (3-79 keV) observations of the millisecond pulsar (MSP) binary PSR J1023+0038 using NuSTAR. This system has been shown transiting between a low-mass X-ray binary (LMXB) state and a rotation-powered MSP state.
Cheng, K. S.   +6 more
core   +3 more sources

Origin of the Binary Pulsar J0737-3039B

open access: yesPhysical Review Letters, 2005
Evolutionary scenarios suggest that the progenitor of the new binary pulsar J0737-3039B \cite{ref1,ref2} was a He-star with $M > 2.1-2.3~\Ms$ \cite{ref3,ref4}. We show that this case implies that the binary must have a large ($>120$ km/s) center of mass velocity.
Tsvi Piran, Nir J. Shaviv
openaire   +5 more sources

The NANOGrav 15 yr Data Set: Observations and Timing of 68 Millisecond Pulsars

open access: yesThe Astrophysical Journal Letters, 2023
We present observations and timing analyses of 68 millisecond pulsars (MSPs) comprising the 15 yr data set of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav).
Gabriella Agazie   +100 more
doaj   +1 more source

Constraints on Einstein-Æther theory and Hořava gravity from binary pulsar observations [PDF]

open access: yes, 2013
Binary pulsars are ideal to test the foundations of General Relativity, such as Lorentz symmetry, which requires that experiments produce the same results in all free-falling (i.e.inertial) frames.
Kent Yagi   +3 more
semanticscholar   +1 more source

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