Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/PandiantagA1969tp.ps Дата изменения: Mon Aug 30 23:57:14 2004 Дата индексирования: Sat Dec 22 22:47:14 2007 Кодировка: Поисковые слова: stars

Proposal Identication No.: A1969 Date Received: 2004-May-28 00:06:53
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Galactic
Total Time Requested: 200 Hours
Proposal Title: Tracing high-mass star formation in the Galaxy
ABSTRACT:
Theoretical and observational studies have revealed that the 6.668 GHz methanol masers are precursors of
ultracompact HII regions, and are excellent tracers of high-mass star formation. These are the second brightest
masers yet detected, and as such can be used to trace the earliest phases of high-mass star formation throughout
the Galaxy. Since high-mass star formation occurs preferentially in the spiral arms of our galaxy, methanol masers
are candidates for tracing these regions. We propose carrying out a blind survey for methanol masers in a portion
of the galactic plane visible from Arecibo. The unequaled sensitivity of the 305-meter telescope with the 6-8 GHz
receiver enable a survey that will yield a large sample of methanol masers from which spiral arm structure can be
determined and other valuable information including the methanol maser luminosity function can be deduced. In
addition to giving an excellent candidate list of new ultracompact HII regions in the surveyed region, this work
should be a prelude to extensive VLBI studies probing the dynamics of high-mass star forming regions.
Name Institution E-mail Phone Student
Jagadheep D Pandian Cornell University jagadheep@astro.cornell.edu 607-255-6472 G
Service Observing Request Remot e Observing Request
X None No
All of the observing run. X Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
Atmospheric Observation Instruments:
Special Equipment or setup: none
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RFI Considerations
Frequency Ranges Planned
2