Results 71 to 80 of about 6,553 (188)
, 2012 We analytically work out several effects which a violation of the Strong Equivalence Principle (SEP) induces on the orbital motion of a binary system constituted of self-gravitating bodies immersed in a constant and uniform external field.
Arzoumanian Z +19 more
core +1 more source
Further Observations of the Planets Pulsar [PDF]
International Astronomical Union Colloquium, 1996 Abstract Recent results of timing observations of the planets pulsar, PSR B1257+12, are discussed. The current timing model includes significant contributions from the second and the third–order period derivatives. If these contributions are related to dynamical effects induced by a fourth distant planet, it would be a Saturn–mass object in a ~170 ...
openaire +1 more source
Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter
Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.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
An Algebraic Approach to Light–Matter Interactions
Advanced Physics Research, Volume 4, Issue 1, January 2025.This is a review of an algebraic approach to light–matter interactions that is theoretically powerful and computationally friendly. Theoretical expressions can be developed and manipulated conveniently thanks to the generality of the basis on which the approach rests, and a compact notation.
Ivan Fernandez‐Corbaton
wiley +1 more source
XMM‐Newton Observations of the Peculiar Be X‐Ray Binary A0538‐66
Astronomische Nachrichten, Volume 346, Issue 1, January 2025.ABSTRACT A0538‐66 is a neutron star/Be x‐ray binary located in the Large Magellanic Cloud and, since its discovery in the 70s, it showed a peculiar behavior that makes it a unique object in the high‐mass x‐ray binaries scene: the extremely eccentric orbit (e=0.72$$ e=0.72 $$), the short spin period of the neutron star (P=69$$ P=69 $$ ms), the episodes ...
Michela Rigoselli +3 more
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.This paper proposes a Mars probe navigation method that integrates three navigation techniques: x‐ray pulsar, inter‐satellite ranging and landmark‐based navigation. By using the difference in pulse arrival times (TDOA) observed by the probe and the auxiliary satellite, the method eliminates constant systematic errors, improves state estimation and ...
Shuting Wang +4 more
wiley +1 more source
Searching for Debris Disks around Isolated Pulsars
, 2014 Different pieces of observational evidence suggest the existence of disks around isolated neutron stars. Such disks could be formed from supernova fallback when neutron stars are born in core-collapse supernova explosions.
Wang, Zhongxiang
core +1 more source
One pulsar, two white dwarfs, and a planet confirming the strong equivalence principle [PDF]
, 2022 Guillaume Voisin +9 more
openalex +1 more source
Yet Another Model of Soft Gamma Repeaters
, 1994 We develop a model of SGR in which a supernova leaves planets orbiting a neutron star in intersecting eccentric orbits. These planets will collide in $\sim 10^4$ years if their orbits are coplanar.
Katz, J. I., Toole, H. A., Unruh, S. H.
core +2 more sources
Comparison of Deep Space Navigation Using Optical Imaging, Pulsar Time-of-Arrival Tracking, and/or Radiometric Tracking. [PDF]
J Astronaut Sci, 2022 Ely T +4 more
europepmc +1 more source