257 citations · 468 across the 7 of their papers we have counts for
7 papers
The Megamaser Cosmology Project. VI. Observations of NGC 6323
C. Y. Kuo, J. A. Braatz, K. Y. Lo +6
We present observations of the H2O megamasers in the accretion disk of NGC 6323. By combining interferometric and spectral monitoring data, we estimate H km/…
A size of ~1 AU for the radio source Sgr A* at the centre of the Milky Way
Zhi-Qiang Shen, K. Y. Lo, M. -C. Liang +2
Although it is widely accepted that most galaxies have supermassive black holes (SMBHs) at their centers^{1-3}, concrete proof has proved elusive. Sagittarius A* (Sgr A*)^4, an ext…
Variability of Sagittarius A* - Flares at 1 Millimeter
Jun-Hui Zhao, K. H. Young, R. M. Herrnstein +5
We report the results from recent observations of Sgr A* at short-/sub-millimeter wavelengths made with the partially finished Sub-Millimeter Array (SMA) on Mauna Kea. A total of 2…
Intrinsic Size and Shape of Sgr A*: 3.6 AU by <1 AU
K. Y. Lo, Z. -Q. Shen, J. -H. Zhao +1
By means of near-simultaneous multi-wavelength VLBA measurements, we determine for the first time the intrinsic size of Sgr A* to be 3.6 AU by <1 AU with the major axis oriented es…
ISO measurements of [CII] line variations in galaxies
S. Malhotra, G. Helou, G. Stacey +11
We report measurements of the [CII] fine structure line at 157.714 micron in 30 normal star-forming galaxies with the Long Wavelength Spectrometer (LWS) on the Infrared Space Obser…
The Mid-Infrared Color of NGC 6946
G. Helou, S. Malhotra, C. A. Beichman +10
We analyze the new mid-infrared maps of NGC 6946 for variations in the color ratio of the 7-to-15 micron emission. Our preliminary findings are that this mid-infrared color is rema…