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- University of Colorado BoulderUS70 papers
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7 papers · 1 filter
VLA Observations of DG Tau's Radio Jet: A highly collimated thermal outflow
C. Lynch, R. L. Mutel, M. Güdel +4
The active young protostar DG Tau has an extended jet that has been well studied at radio, optical, and X-ray wavelengths. We report sensitive new VLA full-polarization observation…
Cassini UVIS Observations of the Io Plasma Torus: I. Initial Results
Andrew J. Steffl, A. Ian F. Stewart, Fran Bagenal
During the Cassini spacecraft's flyby of Jupiter (October, 2000-March, 2001), the Ultraviolet Imaging Spectrograph (UVIS) produced an extensive dataset consisting of 3,349 spectral…
Cassini UVIS observations of the Io plasma torus. II. Radial variations
Andrew J. Steffl, Fran Bagenal, A. Ian F. Stewart
On January 14, 2001, shortly after the Cassini spacecraft's closest approach to Jupiter, the Ultraviolet Imaging Spectrometer (UVIS) made a radial scan through the midnight sector…
WR 120bb and WR 120bc: a pair of WN9h stars with possibly interacting circumstellar shells
Sonja Burgemeister, Vasilii V. Gvaramadze, Guy S. Stringfellow +3
Two optically obscured Wolf-Rayet (WR) stars have been recently discovered by means of their infrared (IR) circumstellar shells, which show signatures of interaction with each othe…
Star-forming Region Sh 2-233IR I. Deep NIR Observations toward the Embedded Stellar Clusters
Chi-Hung Yan, Y. C. Minh, Shiang-Yu Wang +2
We observed the Sh 2-233IR (S233IR) region with better sensitivity in near-infrared than previous studies for this region. By applying statistical subtraction of the back- ground s…
X-ray illumination of the ejecta of Supernova 1987A
J. Larsson, C. Fransson, G. Östlin +25
We present the late-time optical light curve of the ejecta of SN 1987A measured from HST imaging observations spanning the past 17 years. We find that the flux from the ejecta decl…