145 citations · 1k across the 35 of their papers we have counts for
34 papers
The ICRF-3: Status, plans, and progress on the next generation International Celestial Reference Frame
Z. Malkin, C. S. Jacobs, F. Arias +17
The goal of this presentation is to report the latest progress in creation of the next generation of VLBI-based International Celestial Reference Frame, ICRF3. Two main directions…
VLA survey of the 22 GHz H2O masers toward 10 silicate carbon stars
K. Ohnaka, D. A. Boboltz, G. Mulitz-Schimel +2
Despite their carbon-rich photospheres, silicate carbon stars show evidence of oxygen-rich circumstellar material, which is considered to exist in disks. Silicate carbon stars repr…
New insights into the dust formation of oxygen-rich AGB stars
I. Karovicova, M. Wittkowski, K. Ohnaka +3
We observed the AGB stars S Ori, GX Mon and R Cnc with the MIDI instrument at the VLTI. We compared the data to radiative transfer models of the dust shells, where the central stel…
Radio and IR interferometry of SiO maser stars
M. Wittkowski, D. A. Boboltz, M. D. Gray +3
Radio and infrared interferometry of SiO maser stars provide complementary information on the atmosphere and circumstellar environment at comparable spatial resolution. Here, we pr…
Quasometry, Its Use and Purpose
Valeri Makarov, Ciprian Berghea, David Boboltz +8
Quasometry is precision measurement of celestial positions and apparent motion of very distant extragalactic objects, such as quasars, galactic nuclei, and QSOs. We use this term t…
Mid-infrared interferometric monitoring of evolved stars - The dust shell around the Mira variable RR Aql at 13 epochs
I. Karovicova, M. Wittkowski, D. A. Boboltz +3
We obtained 13 epochs of mid-infrared interferometry with the MIDI instrument at the VLTI between April 2004 and July 2007, covering pulsation phases 0.45-0.85 within four cycles.…