Results 61 to 70 of about 3,237 (137)

VLBI Observations of SN 2012AU Reveal a Compact Radio Source a Decade Post Explosion

The Astrophysical Journal
Three leading models have been put forth to justify the observed radio re-brightening associated with stripped-envelope supernovae (SESNe) years post-explosion: radiation from an emerging pulsar wind nebula (PWN), shock interaction with a dense ...
Mattias Lazda, Kenzie Nimmo, Maria R. Drout, Benito Marcote, Jason W. T. Hessels, Eli Wiston, Raffaella Margutti, Omar Ould-Boukattine, Tanmoy Laskar, Jacco Vink, Ryan Chornock, James K. Leung, Deanne L. Coppejans, Dan Milisavljevic, Juan Mena-Parra, Dan Patnaude   +15 more
doaj   +1 more source

The Subparsec-scale Structure and Evolution of Centaurus A. III. A Multi-epoch Spectral and Polarimetric VLBA Study

The Astronomical Journal
The Centaurus A radio galaxy, due to its proximity, presents itself as one of the few systems that allow the study of relativistic jet outflows at subparsec distances from the central supermassive black holes, with high signal to noise.
S. Prabu, S. J. Tingay, A. Bahramian, J. C. A. Miller-Jones, C. M. Wood, S. P. O’Sullivan   +5 more
doaj   +1 more source

Probing the solar corona with very long baseline interferometry. [PDF]

Nat Commun, 2014
Soja B, Heinkelmann R, Schuh H.
europepmc   +1 more source

Unveiling the Complex Jet Dynamics in the Blazar 2021+317 through Multiepoch Very Long Baseline Interferometry Observations

The Astrophysical Journal
We present an investigation of the compact structure of the active galactic nucleus 2021+317 based on multiepoch very long baseline interferometry (VLBI) observations at 15, 22, and 43 GHz in the period from 2013 through 2024. The VLBI images show a core–
Haitian Shang, Wei Zhao, Xiaoyu Hong, Leonid I. Gurvits, Ailing Zeng, Tao An, Xiaopeng Cheng   +6 more
doaj   +1 more source

Fringe Detection in the Lunar Orbit VLBI Experiment: The Initial Clock Search

The Astronomical Journal
We present the design and implementation of a fringe detection pipeline for the Lunar Orbit VLBI Experiment (LOVEX) on board China’s Queqiao-2 cislunar relay satellite. To address the challenge posed by limited space–ground time synchronization accuracy,
Lei Liu, Fengxian Tong, Juan Zhang, Weimin Zheng   +3 more
doaj   +1 more source

Prospects of Detecting a Jet in Sagittarius A* with Very-long-baseline Interferometry

The Astrophysical Journal
Event Horizon Telescope (EHT) images of the horizon-scale emission around the Galactic center supermassive black hole Sagittarius A* (Sgr A*) favor accretion flow models with a jet component. However, this jet has not been conclusively detected.
Erandi Chavez, Sara Issaoun, Michael D. Johnson, Paul Tiede, Christian Fromm, Yosuke Mizuno   +5 more
doaj   +1 more source

Accessing a New Population of Supermassive Black Holes with Extensions to the Event Horizon Telescope

The Astrophysical Journal
The Event Horizon Telescope (EHT) has produced resolved images of the supermassive black holes (SMBHs) Sgr A* and M87*, which present the largest shadows on the sky.
Xinyue Alice Zhang, Angelo Ricarte, Dominic W. Pesce, Michael D. Johnson, Neil Nagar, Ramesh Narayan, Venkatessh Ramakrishnan, Sheperd Doeleman, Daniel C. M. Palumbo   +8 more
doaj   +1 more source

CHIME/FRB Discovery and Localization of the Swift-observed FRB 20241228A

The Astrophysical Journal
On 2024 December 28, the Canadian Hydrogen Intensity Mapping Experiment (CHIME) FRB project detected the thus-far nonrepeating FRB 20241228A with a real-time signal-to-noise ratio of >50.
Alice P. Curtin, Shion Andrew, Sunil Simha, Alice Cai, Kenzie Nimmo, Shami Chatterjee, Amanda M. Cook, Fengqiu Adam Dong, Yuxin Dong, Tarraneh Eftekhari, Wen-fai Fong, Emmanuel Fonseca, Jason W. T. Hessels, Ronniy C. Joseph, Victoria Kaspi, Calvin Leung, Robert Main, Kiyoshi W. Masui, Ryan Mckinven, Daniele Michilli, Mason Ng, Ayush Pandhi, Aaron B. Pearlman, Mawson W. Sammons, Ketan R Sand, Paul Scholz, Vishwangi Shah, Kaitlyn Shin, Aaron Tohuvavohu   +28 more
doaj   +1 more source

A Very Long Baseline Interferometry Calibrator Grid at 600 MHz for Fast Radio Transient Localizations with CHIME/FRB Outriggers

The Astrophysical Journal
The Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project has a new very long baseline interferometry (VLBI) Outrigger at the Green Bank Observatory (GBO), which forms a 3300 km baseline with CHIME operating at 400–800 MHz ...
Shion Andrew, Calvin Leung, Alexander Li, Kiyoshi W. Masui, Bridget C. Andersen, Kevin Bandura, Alice P. Curtin, Jane Kaczmarek, Adam E. Lanman, Mattias Lazda, Juan Mena-Parra, Daniele Michilli, Kenzie Nimmo, Aaron B. Pearlman, Mubdi Rahman, Vishwangi Shah, Kaitlyn Shin, Haochen Wang, (CHIME/FRB Collaboration)   +18 more
doaj   +1 more source

The Peculiar Velocity of Messier 87 from Microarcsecond Geodetic Very Long Baseline Interferometry Astrometry

The Astrophysical Journal
Our knowledge of the space velocity of Messier 87, which is the dominant galaxy in the Virgo cluster, has been limited to the radial velocity component.
Valeri V. Makarov, Phil Cigan, Kyle A. Corcoran   +2 more
doaj   +1 more source