Publications (7)
Understanding the Radio Variability of Sgr A*
Jean-Pierre Macquart, Geoff Bower
We determine the characteristics of the 7mm to 20cm wavelength radio variability in Sgr A* on time scales from days to three decades. The amplitude of the intensity modulation is b…
A Model for Anisotropic Interstellar Scattering and its Application to Sgr A*
Dimitrios Psaltis, Michael Johnson, Ramesh Narayan +3
Scattering in the ionized interstellar medium is commonly observed to be anisotropic, with theories of magnetohydrodynamic (MHD) turbulence explaining the anisotropy through a pref…
Frequency Standard Contributions to Limitations on the Signal-to-Noise Ratio in Very Long Baseline Interferometric (VLBI) Observations
Eric Burt, Todd Ely, Geoff Bower +3
Since its observation in 2019, the first image of a super-massive black hole using Very Long Baseline Interferometry (VLBI) with an Earth-scale baseline has generated much scientif…
New SETI Sky Surveys for Radio Pulses
Andrew Siemion, Joshua Von Korff, Peter McMahon +9
Berkeley conducts 7 SETI programs at IR, visible and radio wavelengths. Here we review two of the newest efforts, Astropulse and Fly's Eye. A variety of possible sources of microse…
Key Science Goals for the Next Generation Very Large Array (ngVLA): Update from the ngVLA Science Advisory Council (2024)
David J. Wilner, Brenda C. Matthews, Brett McGuire +32
In 2017, the next generation Very Large Array (ngVLA) Science Advisory Council, together with the international astronomy community, developed a set of five Key Science Goals (KSGs…
Commensal, Multi-user Observations with an Ethernet-based Jansky Very Large Array
Jack Hickish, Tony Beasley, Geoff Bower +12
Over the last decade, the continuing decline in the cost of digital computing technology has brought about a dramatic transformation in how digital instrumentation for radio astron…
Enabling New ALMA Science with Improved Support for Time-Domain Observations
Kate D. Alexander, Edo Berger, Geoff Bower +34
While the Atacama Large Millimeter/submillimeter Array (ALMA) is a uniquely powerful telescope, its impact in certain fields of astrophysics has been limited by observatory policie…