Results 101 to 110 of about 79,833 (199)

Transient Blurring of the Scintillation Arc of Pulsar B1737+13

The Astrophysical Journal
For many pulsars, the scattering structures responsible for scintillation are typically dominated by a single, thin screen along the line of sight, which persists for years or decades.
Yen-Hua Chen, Sammy Siegel, Daniel Baker, Ue-Li Pen, Dan Stinebring   +4 more
doaj   +1 more source

Imaging without visibilities

Astronomy & Astrophysics
Context. The spatially coherent multipath propagation of pulsar radiation leads to a temporal and spectral interference patterns called scintillation.
Sprenger Tim, Shi Xun, Wucknitz Olaf, Main Robert A.   +3 more
doaj   +1 more source

Identifying Pulsar Candidates in Interferometric Radio Images Using Scintillation

The Astrophysical Journal
Pulsars have been primarily detected by their narrow pulses or periodicity in time domain data. Interferometric surveys for pulsars are challenging due to the trade-off between beam sensitivity and beam size and the corresponding tradeoff between survey ...
Jitendra Salal, Shriharsh P. Tendulkar, Visweshwar Ram Marthi   +2 more
doaj   +1 more source

Interstellar scintillation is an indicator of astrometric stability

, 2013
We examine the relationship between astrometric stability and astrophysical properties in flat-spectrum radio-loud quasars making up the celestial reference frame. We use position determinations from geodetic VLBI measurements, and develop a new metric for source position stability.
Schaap, Robert, Shabala, Stanislav, Ellingsen, Simon, Titov, Oleg, Lovell, Jim   +4 more
openaire   +2 more sources

Diffractive Interstellar Scintillation Timescales and Velocities

The Astrophysical Journal, 1998
We derive general relationships between the observed timescale of diffractive interstellar scintillations and the physical velocities of the observer, the source, and the scattering medium. Our treatment applies exclusively to saturated scintillations of point sources in the strong scattering regime.
J. M. Cordes, B. J. Rickett
openaire   +1 more source

Scintillation Velocity and Arc Observations of FRB 20201124A

The Astrophysical Journal Letters
We present the scintillation velocity measurements of FRB 20201124A from the Five-hundred-meter Aperture Spherical radio Telescope observations, which reveal an annual variation.
Ziwei Wu, Weiwei Zhu, Bing Zhang, Yi Feng, JinLin Han, Di Li, Dongzi Li, Rui Luo, Chenhui Niu, Jiarui Niu, Bojun Wang, Fayin Wang, Pei Wang, Weiyang Wang, Heng Xu, Yuanpei Yang, Yongkun Zhang, Dejiang Zhou, Yuhao Zhu, Can-Min Deng, Yonghua Xu, FAST FRB Key Science Project   +21 more
doaj   +1 more source

Turbulence in nearly incompressible fluids: density spectrum, flows, correlations and implication to the interstellar medium [PDF]

Nonlinear Processes in Geophysics, 2005
Interstellar scintillation and angular radio wave broadening measurements show that interstellar and solar wind (electron) density fluctuations exhibit a Kolmogorov-like k-5/3 power spectrum extending over many decades in wavenumber space.
S. Dastgeer, G. P. Zank
doaj  

THE DAILY 110 MHZ RADIO WAVE SKY SURVEY: STATISTICAL ANALYSIS OF IMPULSE PHENOMENA FROM OBSERVATION IN 2012-2013

Odessa Astronomical Publications, 2016
On the Pushchino Radio Astronomy Observatory of Lebedev Physical Institute by radio telescope BSA (Big Scanning Antenna) in 2012 started daily multi-beam observations at the frequency range 109- 112 MHz.
V. A. Samodurov, D. V. Dumsky, E. A. Isaev, A. E. Rodin, A. N. Kazancev, V. A. Fedorova, Yu. A. Belyatskij   +6 more
doaj   +1 more source

Neutrino and EM asterometric detection of habitable exoplanets. [PDF]

Bioinformation, 2023
Shapshak P.
europepmc   +1 more source

A Pilot Study of Mildly Recycled Pulsars: A Case Study of PSR J2338+4818

The Astrophysical Journal
Mildly recycled pulsars are neutron stars partially spun up through relatively short mass-transfer phases, typically with massive carbon–oxygen (CO) or oxygen–neon–magnesium (ONeMg) white dwarf companions.
Yujie Chen, Yujie Lian, Yujie Wang, Liyun Zhang, Lei Qian, Zhichen Pan, Shuo Cao, Dejiang Yin, Baoda Li, Ruili He, Tong Liu, Wenze Li, Yichi Zhang, Yifeng Li, Qiaoli Hao, Jinyou Song, Shuangyuan Chen, Xingyi Wang, Xianghua Niu, Minglei Guo, Menglin Huang   +20 more
doaj   +1 more source