Search Publications
Imaging Stellar Radio Photospheres with the Next Generation Very Large Array
White, S. M.; Carilli, C. L.; Butler, B. +2 more
We perform simulations of the capabilities of the next generation Very Large Array to image stellar radio photospheres. For very large (in angle) stars, such as red supergiants within a few hundred parsecs, good imaging fidelity results can be obtained on radio photospheric structures at 38 GHz employing standard techniques, such as disk model fit…
Probing Strong Binary Interactions and Accretion in AGB Stars with the ngVLA
Sahai, R.
Understanding strong binary interactions is of wide astrophysical importance, and the deaths of most stars in the Universe that evolve in a Hubble time could be fundamentally affected by such interactions. These stars end their lives, evolving from Asymptotic Giant Branch (AGB) stars with extensive mass-loss into planetary nebulae with a spectacul…
A Six-Dimensional Tomographic View of Galactic Star-Formation
Loinard, L.; Reid, M. J.
Various sign-posts of recent star-formation activity, such as water and methanol maser emission or magnetically active low-mass young stars, can be detected with Very Long Baseline Interferometry (VLBI) radio arrays. The extremely accurate astrometry already attainable with VLBI instruments implies that the trigonometric parallax and the proper mo…
Indirect Detection of Extrasolar Planets via Astrometry
Matthews, B. C.; Butler, B. J.
Radio wavelength astrometry of stars and other objects has a long and productive history. The use of that technique to determine whether stars have planets around them would cover a nearly unique part of the parameter space for detection of those systems. Namely, astrometric observations are most sensitive to systems with large planets in moderate…