Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.0806v&link_type=abstract
American Astronomical Society Meeting 208, #8.06; Bulletin of the American Astronomical Society, Vol. 38, p.87
Astronomy and Astrophysics
Astronomy
Scientific paper
From April 2003 to March 2004, we monitored the water maser emission from a sample of approximately 30 low-to-intermediate mass young stellar objects (YSOs) in different environments approximately every two weeks (excluding the summer months), using the 100-meter NRAO Green Bank Telescope. In this poster we present the spectra from this monitoring project, and address the questions of variation timescales, the underlying causes of the maser excitation and variations, and the role of YSO evolution in the water maser phenomenon. We report the results of a search for high-velocity (+/- 350 km/s) water maser emission toward these objects, obtained as a byproduct of this monitoring project. Finally, we will report on a detailed case study: the very strong and highly variable water masers in the low-mass YSO IRAS 16293-2422 in the rho Ophiuchi star-forming region.The NRAO is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc. Part of this research was carried out under the auspices of the National Science Foundation's Research Experience for Teachers (RET) program at the NRAO, and we gratefully acknowledge the funding for this program.
Alwyn Wootten H.
Claussen Mark J.
Marvel Kevin B.
Voss Kurt S.
Wilking Bruce A.
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