- California Institute of TechnologyUS1.2k papers
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118 papers · 2 filters
A Stationary Core with a One-sided Jet in the Center of M81
M. F. Bietenholz, N. Bartel, M. P. Rupen
The nucleus of M81 was observed at 8.3 GHz with VLBI at 20 epochs over 4.5yrs, with a linear resolution at the source of about 2000 AU or 0.01 pc. Phase-referenced mapping with res…
Radio Cores in Low-Luminosity AGN: ADAFs or Jets?
Heino Falcke, Neil M. Nagar, Andrew S. Wilson +2
We have surveyed two large samples of nearby low-luminosity AGN with the VLA to search for flat-spectrum radio cores, similar to Sgr A* in the Galactic Center. Roughly one third of…
The Neutral Hydrogen Distribution in Merging Galaxies: Differences between Stellar and Gaseous Tidal Morphologies
J. E. Hibbard, W. D. Vacca, M. S. Yun
We have mapped the neutral atomic gas (HI) in the three disk-disk merger systems NGC 520, Arp 220, and Arp 299. These systems differ from the majority of the mergers mapped in HI,…
HST and VLA Observations of the H2O Gigamaser Galaxy TXS2226-184
Heino Falcke, Andrew S. Wilson, Christian Henkel +2
We present HST/WFPC2 images in Halpha+[NII]6548,6583 lines and continuum radiation and a VLA map at 8 GHz of the H2O gigamaser galaxy TXS2226-184. This galaxy has the most luminous…
The COINS Sample - VLBA Identifications of Compact Symmetric Objects
A. B. Peck, G. B. Taylor
We present results of multifrequency polarimetric VLBA observations of 34 compact radio sources. The observations are part of a large survey undertaken to identify CSOs Observed in…
Redshifts and Neutral Hydrogen Observations of Compact Symmetric Objects in the COINS Sample
A. B. Peck, G. B. Taylor, C. D. Fassnacht +2
Compact Symmetric Objects (CSOs) are young radio galaxies whose jet axes lie close to the plane of the sky, and whose appearance is therefore not dominated by relativistic beaming…