Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/ChurchwelltagA1575tp.ps Дата изменения: Mon Apr 19 19:59:51 2004 Дата индексирования: Sat Dec 22 23:46:17 2007 Кодировка: Поисковые слова: р п р п р п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п п р п

Proposal Identication No.: A1575 Date Received: 2001-Sep-30 01:34:08
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Galactic
Total Time Requested: 20 Hours
Proposal Title: Kinematic Distances to Massive Star Formation Regions in the Inner Galaxy
ABSTRACT:
The SIRTF/GLIMPSE Legacy Science Program plans to image the inner 2/3 of the Galactic disk. Distances of the
sources along the line of sight will be inferred by coincidence with known objects, which all suer from distance
ambiguity. In the pilot survey of 21 massive SFR in the rst quadrant of the Galaxy, the H110a line in emission
and the 110-111 line of H2CO in absorption were observed simultaneously using the Arecibo antenna. The H110a
line was used to establish the velocity of the HII regions and the H2CO absorption components were used to
distinguish between near and far distances. It was possible to establish unambiguous distance for 95% of the
sample. In preparation to the SIRTF mission we propose to observe 45 UC HII regions in the SIRTF survey region
to attempt to resolve their distance ambiguity. A by-product of our observations will be information about the
spiral structure in our Galaxy.
Name Institution E-mail Phone Student
Edward Churchwell University of Wis-
consin - Madison
churchwell@astro.wisc.edu (608) 262-4909 no
I do NOT want to do remote observing.
Instrument Setup
C
Atmospheric Optical Instruments:
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
1