Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/LockmantagA2329tp.pdf Дата изменения: Thu Jun 7 20:24:39 2007 Дата индексирования: Sat Sep 6 05:25:31 2008 Кодировка:

Proposal Identification No.:

A2329

Date Received:

2007-May-30 06:16:37

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Galactic 9 Hours 30 min between 19:30 and 20:30

Smiths Cloud: A High-Velocity Cloud Entering the Galactic Plane

Smith's Cloud has been knonw since its discovery in 1963 as a large (10 degree across) elongated HI feature in the inner Galaxy of unknown origin. It is usually considered a high-velocity cloud, but sometimes as part of a spiral arm or material ejected from a star-forming region. We have recently obtained new HI observations of the Cloud with the Green Bank Telescope which show clear signs of its interaction with the Galactic disk and give a distance estimate of 12 kpc. It appears to be a high-velocity cloud entering the Galactic disk. The area where it interacts with ambient gas is unresolved with the 9' beam of the GBT and we would like to observe it with the higher resolution of Arecibo. The experiment should give us detailed information on the shock front, the extent of the shredding of Smith's Cloud by the Galaxy, and possibly even the orbit of the cloud.

Name Felix J Lockman

Institution NRAO

E-mail jlockman@nrao.edu

Phone 304-456-2302

Student no

Remote Observing Request

X

Observer will travel to AO Remote Observing In Absentia (instructions to operator)

Instrument Setup
ALFA Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned

2