Results 51 to 60 of about 256 (175)

HAWC J0630+186 Could Not Be Powered by PSR J0630+19

The Astrophysical Journal
3HWC J0630+186 is one of the very-high-energy gamma-ray sources listed in the third High-Altitude Water Cherenkov catalog; however, its origin remains unidentified.
Bojun Wang, Xiaohong Cui, Jiguang Lu, Heng Xu, Renxin Xu   +4 more
doaj   +1 more source

A Study of Real-time Detection Methods for Solar Radio Burst Identification

The Astrophysical Journal Supplement Series
Solar flares, coronal mass ejections, and other solar radio burst phenomena release substantial amounts of solar radiation energy, resulting in adverse space weather conditions and posing significant hazards in space. Spectrum analysis conducted manually
YongLin Yu, ChengLong Qiao, Shuo Xu, QinZheng Li, YanRui Su, HongQiang Song, FaBao Yan   +6 more
doaj   +1 more source

Distance to Sh2–106 from Gaia DR3 and its embedded radio population: Implications for a candidate explosive outflow

Astronomy & Astrophysics
Sh2–106 has recently been proposed as a candidate explosive molecular outflow, but the physical interpretation of the region depends critically on its distance.
Dzib Sergio A.
doaj   +1 more source

The Celestial Reference Frame at K Band: Imaging. I. The First 28 Epochs

The Astronomical Journal, 2023
We present K -band (24 GHz) images of 731 compact extragalactic radio sources with submilliarcsecond resolution, based on radio interferometric observations made with the Very Long Baseline Array of 10 telescopes during 29 day long sessions spanning from
Aletha de Witt, Christopher S. Jacobs, David Gordon, K-band Celestial Reference Frame Collaboration, Michael Bietenholz, Marisa Nickola, Alessandra Bertarini   +6 more
doaj   +1 more source

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

Radio Astrometry Using Connected-Element Interferometers [PDF]

Symposium - International Astronomical Union, 1974
The basic techniques of conventional radio interferometry are explained and a review given of the achievements and limitations of the methods as applied to radio astrometry.
openaire   +1 more source

An Unusual Pulse Shape Change Event in PSR J1713+0747 Observed with the Green Bank Telescope and CHIME

The Astrophysical Journal
The millisecond pulsar J1713+0747 underwent a sudden and significant pulse shape change between 2021 April 16 and 17 (MJDs 59320 and 59321). Subsequently, the pulse shape gradually recovered over the course of several months.
Ross J. Jennings, James M. Cordes, Shami Chatterjee, Maura A. McLaughlin, Paul B. Demorest, Zaven Arzoumanian, Paul T. Baker, Harsha Blumer, Paul R. Brook, Tyler Cohen, Fronefield Crawford, H. Thankful Cromartie, Megan E. DeCesar, Timothy Dolch, Elizabeth C. Ferrara, Emmanuel Fonseca, Deborah C. Good, Jeffrey S. Hazboun, Megan L. Jones, David L. Kaplan, Michael T. Lam, T. Joseph W. Lazio, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, James W. McKee, Dustin R. Madison, Bradley W. Meyers, Chiara M. F. Mingarelli, David J. Nice, Timothy T. Pennucci, Benetge B. P. Perera, Nihan S. Pol, Scott M. Ransom, Paul S. Ray, Brent J. Shapiro-Albert, Xavier Siemens, Ingrid H. Stairs, Daniel R. Stinebring, Joseph K. Swiggum, Chia Min Tan, Stephen R. Taylor, Sarah J. Vigeland, Caitlin A. Witt   +43 more
doaj   +1 more source

Constraints on the Persistent Radio Source Associated with FRB 20190520B Using the European VLBI Network

The Astrophysical Journal Letters, 2023
We present very long baseline interferometry (VLBI) observations of a continuum radio source potentially associated with the fast radio burst source FRB 20190520B.
Shivani Bhandari, Benito Marcote, Navin Sridhar, Tarraneh Eftekhari, Jason W. T. Hessels, Danté M. Hewitt, Franz Kirsten, Omar S. Ould-Boukattine, Zsolt Paragi, Mark P. Snelders   +9 more
doaj   +1 more source

Review of asteroid, meteor, and meteorite‐type links

Meteoritics &Planetary Science, Volume 60, Issue 4, Page 928-973, April 2025.
Abstract With the goal to determine the origin of our meteorites in the asteroid belt, video and photographic observations of meteors have now tracked 75 meteorite falls. Six years ago, there were just hints that different meteorite types arrived on different orbits, but now, the number of orbits (N) is high enough for distinct patterns to emerge.
Peter Jenniskens, Hadrien A. R. Devillepoix   +1 more
wiley   +1 more source

Synthesis Imaging with a Lunar Orbit Array. III. Augmented Lagrangian Multiplier Imaging Using Gradient Descent Optimization (AMIGO)

The Astrophysical Journal Supplement Series
Ground-based radio observations below 30 MHz are severely limited by ionospheric interference and radio-frequency interference from Earth. A lunar-orbiting radio interferometer mission, the Discovering the Sky at the Longest wavelengths (DSL, also known ...
Meng Zhou, Furen Deng, Yidong Xu, Xuelei Chen   +3 more
doaj   +1 more source