Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/LubowichtagA2057tp.pdf Дата изменения: Sat May 21 04:43:59 2005 Дата индексирования: Sat Dec 22 23:35:09 2007 Кодировка: Поисковые слова: http astrokuban.info astrokuban

Proposal Identification No.:

A2057

Date Received:

2005-Feb-01 18:23:15

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT:
We prop ose to observe DI at 327 MHz most deuterated known molecular cloud (NGC 1333) in which ND3, D2S, ND2H, D2CO,CHD2OH, and CD3OH have b een detected. Gas-phase and grain-mo dels predict that DI/HI = 0.1 0.4 in this unusual cloud. The column density of DI is predicted to b e 10 - 100 times the column densities in any Galactic HI region. Thus we should b e able to confirm our etection at the 5 sigma level. We will compare mo dels that predict that deuterated molecules come from the gas-phase reactions or from the evap oration of grain mantles. Knowledge of the column densities of b oth D, H, and deuterated molecules in this cloud will allow us to determine their physical prop erties (T and density) and to constrain astro chemistry mo dels. We will also estimate the underlying D/H ratio NGC 1333. If we do not detect DI, then the doubly and triply deuterated molecules cannot come from the gas-phase reactions and must result from the evap oration of grain mantles

Regular Astronomy Spectroscopy Galactic 40 Hours

DI in the Most Deuterated Known Molecular Cloud: A Key to Understanding Deuterium Astrochemistry

Name Donald Lubowich

Institution Hofstra University

E-mail donald.lubowich@hofstra.edu

Phone 516-921-4320

Student no

Service Observing Request

Remot e Observing Request

X

None All of the observing run. Part of the observing run. Queue Observing X

No Maybe Yes

Instrument Setup
327 Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned

2