Results 1 to 10 of about 79,833 (199)

The Breakthrough Listen Search for Intelligent Life: Galactic Center Search for Scintillated Technosignatures

The Astronomical Journal
The search for extraterrestrial intelligence at radio frequencies has focused on spatial filtering as a primary discriminant from terrestrial interference.
Bryan Brzycki, Andrew P. V. Siemion, Imke de Pater, Carmen Choza, Steve Croft, Vishal Gajjar, Jamie Drew, Brian C. Lacki, Danny C. Price, Sofia Z. Sheikh   +9 more
doaj   +1 more source

Prospects for Identifying Pulsar Candidates in Radio Surveys Using Scintillation

The Astrophysical Journal
In our previous paper, we developed a technique for identifying pulsar candidates in interferometric radio images using their distinctive scintillation signatures.
Jitendra Salal, Shriharsh P. Tendulkar, Visweshwar Ram Marthi   +2 more
doaj   +1 more source

Reconnection-driven energy cascade in magnetohydrodynamic turbulence. [PDF]

Sci Adv, 2022
Dong C, Wang L, Huang YM, Comisso L, Sandstrom TA, Bhattacharjee A.   +5 more
europepmc   +1 more source

Modeling the Morphology of Fast Radio Bursts and Radio Pulsars with fitburst

The Astrophysical Journal Supplement Series
We present a framework for modeling astrophysical pulses from radio pulsars and fast radio bursts (FRBs). This framework, called fitburst , generates synthetic representations of dynamic spectra that are functions of several physical and heuristic ...
E. Fonseca, Z. Pleunis, D. Breitman, K. R. Sand, B. Kharel, P. J. Boyle, C. Brar, U. Giri, V. M. Kaspi, K. W. Masui, B. W. Meyers, C. Patel, P. Scholz, K. Smith   +13 more
doaj   +1 more source

Forecasting Heliospheric CME Solar-Wind Parameters Using the UCSD Time-Dependent Tomography and ISEE Interplanetary Scintillation Data: The 10 March 2022 CME. [PDF]

Sol Phys, 2023
Jackson BV, Tokumaru M, Iwai K, Bracamontes MT, Buffington A, Fujiki K, Murakami G, Heyner D, Sanchez-Cano B, Rojo M, Aizawa S, Andre N, Barthe A, Penou E, Fedorov A, Sauvaud JA, Yokota S, Saito Y.   +17 more
europepmc   +1 more source

Different Polarized Components of the Quasar 3C 286 Revealed by FAST

The Astrophysical Journal
3C 286, a well-known radio calibrator, exhibits stability in both total flux density and polarization parameters. However, its stable and luminous interstellar radio signal may encounter interplanetary scintillation (IPS) due to density irregularities in
Pengfu Tian, Xiao Chen, Wen Yang, Wei Wang   +3 more
doaj   +1 more source

Implications for Galactic Electron Density Structure from Pulsar Sightlines Intersecting H ii Regions

The Astrophysical Journal
Recent radio surveys have revealed pulsars with dispersion and scattering delays induced by ionized gas that are larger than the rest of the observed pulsar population, in some cases with electron column densities (or dispersion measures, DMs) larger ...
Stella Koch Ocker, Loren D. Anderson, T. Joseph W. Lazio, James M. Cordes, Vikram Ravi   +4 more
doaj   +1 more source

Constraining Scattering Medium Geometry with Cyclic Spectroscopy

The Astrophysical Journal Letters
We use cyclic spectroscopy to infer the scintillation parameter C _1 for the millisecond pulsar B1937+21. This marks the first time this parameter has been measured for any pulsar without assuming a pulse broadening function shape prior to deconvolution ...
Jacob E. Turner
doaj   +1 more source

Shocks, Compressible Perturbations, and Intermittency in the Very Local Interstellar Medium: Voyager 1 and 2 Observations and Numerical Modeling

The Astrophysical Journal
The Voyager spacecraft (V1 and V2) provide unique in situ measurements of perturbations propagating beyond the heliopause through the very local interstellar medium (VLISM), including the shocks and pressure fronts whose origin is debated. In particular,
Federico Fraternale, Nikolai V. Pogorelov, Ratan Bera, Leonard F. Burlaga, Maciej Bzowski   +4 more
doaj   +1 more source

Radio Burst Phenomenology of AD Leonis and Associated Signatures of Propagation Effects

The Astrophysical Journal
We present the high-resolution radio dynamic spectra of AD Leonis (AD Leo) between 1.0 and 1.5 GHz taken by the Five-hundred-meter Aperture Spherical radio Telescope on 2023 December 1.
Jiale Zhang, Harish K. Vedantham, Joseph R. Callingham, Hui Tian   +3 more
doaj   +1 more source