Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/DouglastagA2143tp.ps Дата изменения: Tue Oct 11 01:26:09 2005 Дата индексирования: Sat Dec 22 22:49:44 2007 Кодировка: Поисковые слова: dust

Proposal Identification No.: A2143 Date Received: 2005­Oct­03 12:55:04
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub­Category: Spectroscopy
Observation Category: Galactic
Total Time Requested: 45 Hours
Proposal Title: The Molecular State of Galactic Translucent Clouds: OH
ABSTRACT:
The discovery by Grenier et al. (2005, Science) of a population of Galactic clouds with appreciable dust and HI
column density, yet somewhat deficient in the common molecular tracer CO, is a sign of our incomplete
understanding of the multiphase ISM. We propose to observe the 18 cm lines of OH to ascertain the physical
conditions in a few of these clouds. We will combine these observations with datasets of similar angular resolution
(# 10 times better than Grenier et al.), in an e#ort to determine the nature of these dark clouds. Comparison of
the OH emission to H 2 spectra from the SPEAR mission will provide an excellent probe of the molecular gas in
these clouds.
Name Institution E­mail Phone Student
Kevin A Douglas University of Califor­
nia, Berkeley
douglas@ssl.berkeley.edu 510­643­8244 no
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
L­wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
1550­1750 MHz
This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST.
2