Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..344..220h&link_type=abstract
The Cool Universe: Observing Cosmic Dawn, ASP Conference Series, Vol. 344, Proceedings of the conference held 4-8 October, 2004
Astronomy and Astrophysics
Astronomy
Scientific paper
The submillimeter array (SMA) is a powerful instrument to probe the circumstellar structure of evolved stars. High resolution (2--4 arcsec) CO J=2--1 and 3--2 images show that the carbon star V Hya is powering a bipolar molecular jet having an extreme velocity of 70--175 km s-1. The axis of this high velocity jet is perpendicular to the major axis of a flattened disk-like envelope that is expanding with a velocity of ˜16 km s-1. We also obtained excellent images of VY CMa in the CO J=2--1, 13CO J=2--1 and the SO 65--54 lines. The high-resolution images obtained with the SMA show that circumstellar envelopes have unexpectedly complex structure.
Dinh-V-Trung
Hirano Naomi
Müller Samuel
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