Planetary Nebulae Detected in the Spitzer Space Telescope GLIMPSE II Legacy Survey (2009)
We report the result of a search for the infrared counterparts of 37 planetary nebulae (PNs) and PN candidates in the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire II (GLIMPSE II)...
A molecular line survey of the extreme carbon star CRL 3068 at millimeter wavelengths (2009)
Zhang, Yong, Kwok, Sun, Nakashima, Jun-ichi
We present the results of a molecular line survey of the extreme carbon star CRL 3068. The observations were carried out with the Arizona Radio Observatory (ARO) 12m telescope and the Heinrich Hertz...
Probing the mass loss history of the yellow hypergiant IRC+10420 (2009)
Muller, Sebastien, Lim, Jeremy, Kwok, Sun, Muthu, C.
We have used the sub-millimeter array to image the molecular envelope around IRC+10420. Our observations reveal a large and clumpy expanding envelope around the star. The molecular envelope shows a...
Hrivnak, Bruce J., Volk, Kevin, Kwok, Sun
We have carried out mid-infrared spectroscopy of seven Galactic proto-planetary nebulae (PPNs) using the Spitzer Space Telescope. They were observed from 10-36 microns at relatively high spectral...
Morpho-Kinematic Properties of the 21-Micron Source IRAS 07134+1005 (2008)
Nakashima, Jun-ichi, Koning, Nico, Kwok, Sun, Zhang, Yong
We report the results of a Submillimeter Array (SMA) interferometric observation of 21-micron source IRAS 07134+1005 in the CO J=3-2 line. In order to determine the morpho-kinematic properties of the...
A Molecular Line Survey of the Highly Evolved Carbon Star CIT 6 (2008)
We present a spectral line survey of the C-rich envelope CIT 6 in the 2mm and 1.3mm bands carried out with the Arizona Radio Observatory (ARO) 12m telescope and the Heinrich Hertz Submillimeter...
A spectral line survey of NGC 7027 at millimeter wavelengths (2008)
We report on a recent spectral line survey of the planetary nebula (PN) NGC 7027 using the Arizona Radio Observatory (ARO) 12m telescope and the Heinrich Hertz Submillimeter Telescope (SMT) at...
Submillimeter Array Observation of the Proto-Planetary Nebula CRL 618 in the CO J=6-5 Line (2007)
Nakashima, Jun-ichi, Fong, David, Hasegawa, Tatsuhiko, Hirano, Naomi, Koning, Nico, Kwok, Sun, ...
We report on the results of a Submillimeter Array interferometric observation of the proto-planetary nebula CRL 618 in the 12CO J=6-5 line. With the new capability of SMA enabling us to use two...
Goto, Miwa, Kwok, Sun, Takami, Hideki, Hayashi, Masa, Gaessler, W., Hayano, Yutaka, ...
We present 3 mum spectroscopy of the carbon-rich protoplanetary nebulae IRAS 04296+3429 and IRAS 05341+0852, conducted with the adaptive optics system at the Subaru Telescope. We utilize the nearly...
Goto, M., Kwok, Sun, Takami, H., Hayashi, M., Gaessler, W., Hayano, Y., ...
We present 3 um spectroscopy of the carbon-rich proto-planetary nebulae IRAS 04296+3429 and IRAS 05341+0852 conducted with the adaptive optics system at the Subaru Telescope. We utilize the nearly...
Submillimetre observations of comets with Odin: 2001-2005 (2006)
Biver, N., Bockelée-Morvan, D., Crovisier, J., Lecacheux, A., Frisk, U., Hjalmarson, A., ...
The Odin satellite, launched in Feb. 2001, is equipped with a 1.1-m submillimetre telescope. Odin was used to observe the 557 GHz line of water with high spectral resolution in 12 comets between 2001...
Radio observations of comet 9P/Tempel 1 before and after Deep Impact (2006)
Biver, N., Bockelée-Morvan, D., Boissier, J., Crovisier, J., Colom, P., Lecacheux, A., ...
Comet 9P/Tempel 1 was the target of a multi-wavelength worldwide investigation in 2005. The NASA Deep Impact mission reached the comet on 4.24 July 2005, delivering a 370 kg impactor which hit the...
An Infrared Imaging Study of the Bipolar Proto-Planetary Nebula IRAS 16594-4656 (2006)
Volk, Kevin, Hrivnak, Bruce J., Su, Kate Y. L., Kwok, Sun
High-resolution mid-infrared images have been obtained in N-band and Q-band for the proto-planetary nebula IRAS 16594-4656. A bright equatorial torus and a pair of bipolar lobes can clearly be seen...
Polarization of L Dwarfs by Dust Scattering (2005)
The degree of polarization in L dwarfs of spectral types L0 to L6 resulting from dust scattering in a rotation-induced oblate photosphere is calculated. Assuming that forsterite is the main...
Radio Cores of Bipolar Nebulae: Search for Collimated Winds (2003)
Lee, Ting-Hui, Lim, Jeremy, Kwok, Sun
We present results of our search for collimated ionized winds in bipolar nebulae using the Very Large Array (VLA) and the Australia Telescope Compact Array (ATCA). Our search is motivated by the...
High-Resolution Near-Infrared Imaging and Polarimetry of Four Proto-Planetary Nebulae (2003)
Su, Kate Y. L., Hrivnak, Bruce J., Kwok, Sun, Sahai, Raghvendra
High-resolution near-infrared HST NICMOS (F160W, F222M) images and polarization (2 um) observations were made of four bipolar proto-planetary nebulae (PPNs): IRAS 17150-3224, IRAS 17441-2411, IRAS...
THE SYNTHESIS OF INORGANIC AND ORGANIC COMOUNDS IN THE CIRCUMSTELLAR ENVIRONMENT (2003)
Author Institution: Department of Physics and Astronomy, University of Calgary