Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/ReachtagA2902tp.pdf Дата изменения: Thu May 1 22:23:21 2014 Дата индексирования: Mon Apr 11 15:38:31 2016 Кодировка: Поисковые слова: dust

Proposal Identification No.:

A2902

Date Received:

2014-Mar-03 11:54:30

Technical Page
This proposal has not been submitted before. Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Galactic 84 Hours 1 hour

Dark Molecular Gas in the Diffuse Interstellar Medium

Far-infrared and gamma-ray all-sky surveys show evidence for extensive 'dark gas' in the diffuse interstellar medium not traced by 21-cm HI or 3-mm CO lines. We found that the dust column density measured by Planck at 5 arcmin scales follows the HI column density measured by Arecibo with its 3 arcmin beam in the 21-cm line, except with different infrared/HI slopes in different regions. The differences between regions could be their different molecular gas content. We propose to observe the OH emission from a diffuse high-latitude cloud that has evidence for 'dark gas' in the Planck/Arecibo comparison. If the column density of molecular gas found in this experiment matches the apparent excess in the dust column density, then we can calibrate and use the Planck excess to image the diffuse molecular gas.

Name William T. Reach

Institution Universities Space Research Association

E-mail wreach@sofia.usra.edu

Phone 650-602-2292

Student no

Remote Observing Request

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

Instrument Setup
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup: We need the interim correlator. 1


RFI Considerations Frequency Ranges Planned
1420 1665 1667 1720

2