Results 101 to 110 of about 33,296 (260)

Evolution of the Termination Region of the Parsec-scale Jet of 3C 84 Over the Past 20 yr

The Astrophysical Journal
We present the kinematics of the parsec-scale jet in 3C 84 from 2003 November to 2022 June observed with the Very Long Baseline Array at 43 GHz. We find that the C3 component, a bright feature at the termination region of the jet component ejected from ...
Minchul Kam, Jeffrey A. Hodgson, Jongho Park, Motoki Kino, Hiroshi Nagai, Sascha Trippe, Alexander Y. Wagner   +6 more
doaj   +1 more source

VLBA Astrometry of the Galactic Double Neutron Stars PSR J0509+3801 and PSR J1930–1852: A Preliminary Transverse Velocity Distribution of Double Neutron Stars and its Implications

The Astrophysical Journal
The mergers of double neutron star (DNS) systems are believed to drive the majority of short γ -ray bursts (SGRBs), while also serving as production sites of heavy r -process elements.
Hao Ding, Adam T. Deller, Joseph K. Swiggum, Ryan S. Lynch, Shami Chatterjee, Thomas M. Tauris   +5 more
doaj   +1 more source

Solar VLBI [PDF]

In April, 1981, radio telescopes at Dwingeloo (The Netherlands) and Onsala (Sweden) were used as a long-baseline interferometer at a wavelength of 18 cm. The baseline of 619 km gave a spatial resolution on the Sun of about 45 km.
Kuijpers, J., Tapping, K. F.
core   +1 more source

A Geodetic and Astrometric VLBI Experiment at 22/43/88/132 GHz

The Astronomical Journal
Extending geodetic and astrometric Very Long Baseline Interferometry (VLBI) observations from traditional centimeter wavebands to millimeter wavebands offers numerous scientific potentials and benefits. However, it was considered quite challenging due to
Shuangjing Xu, Taehyun Jung, Bo Zhang, Ming Hui Xu, Do-Young Byun, Xuan He, Nobuyuki Sakai, Oleg Titov, Fengchun Shu, Hyo-Ryoung Kim, Jungho Cho, Sung-Moon Yoo, Byung-Kyu Choi, Woo Kyoung Lee, Yan Sun, Xiaofeng Mai, Guangli Wang   +16 more
doaj   +1 more source

An accuracy assessment of Magellan Very Long Baseline Interferometry (VLBI) [PDF]

Very Long Baseline Interferometry (VLBI) measurements of the Magellan spacecraft's angular position and velocity were made during July through September, 1989, during the spacecraft's heliocentric flight to Venus. The purpose of this data acquisition and
Border, J. S., Engelhardt, D. B., Kronschnabl, G. R.   +2 more
core   +1 more source

The European VLBI network [PDF]

The capabilities of the European very long baseline interferometry (VLBI) network are summarized. The range of baseline parameters, sensitivities, and recording and other equipment available are included.
Schilizzi, R. T.
core   +1 more source

A Repeating Fast Radio Burst Source in the Outskirts of a Quiescent Galaxy

The Astrophysical Journal Letters
We report the discovery of the repeating fast radio burst (FRB) source FRB 20240209A using the Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB telescope.
Vishwangi Shah, Kaitlyn Shin, Calvin Leung, Wen-fai Fong, Tarraneh Eftekhari, Mandana Amiri, Bridget C. Andersen, Shion Andrew, Mohit Bhardwaj, Charanjot Brar, Tomas Cassanelli, Shami Chatterjee, Alice Curtin, Matt Dobbs, Yuxin Dong, Fengqiu Adam Dong, Emmanuel Fonseca, B. M. Gaensler, Mark Halpern, Jason W. T. Hessels, Adaeze L. Ibik, Naman Jain, Ronniy C. Joseph, Jane Kaczmarek, Lordrick A. Kahinga, Victoria M. Kaspi, Bikash Kharel, Tom Landecker, Adam E. Lanman, Mattias Lazda, Robert Main, Lluis Mas-Ribas, Kiyoshi W. Masui, Ryan Mckinven, Juan Mena-Parra, Bradley W. Meyers, Daniele Michilli, Kenzie Nimmo, Ayush Pandhi, Swarali Shivraj Patil, Aaron B. Pearlman, Ziggy Pleunis, J. Xavier Prochaska, Masoud Rafiei-Ravandi, Mawson Sammons, Ketan R. Sand, Paul Scholz, Kendrick Smith, Ingrid Stairs   +48 more
doaj   +1 more source

Long baseline vector determinations and intercomparisons [PDF]

The East Coast very long baseline interferometry (VLBI) group has performed about 60 experiments over the last 10 years in the process of developing and exploiting advanced VLBI techniques.
Knight, C. A.
core   +1 more source

Bayesian Constraints on the Ring Ellipticity of M87* 2017 Using Themis

The Astrophysical Journal
Measuring the properties of black hole images has the potential to constrain deviations from general relativity on horizon scales. Of particular interest is the ellipticity of the ring that is sensitive to the underlying spacetime.
Paul Tiede, Avery E. Broderick
doaj   +1 more source

Very Long Baseline Interferometry: the EVN, WSRT, and JIVE [PDF]

, 2019
Huib Jan van Langevelde, R. T. Schilizzi, A. van Ardenne, L.H. Sondaar, Albert‐Jan Boonstra   +4 more
openalex   +1 more source