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Proposal Identification No.:

A2266

Date Received:

2006-Oct-01 22:28:21

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Galactic 160 Hours 1 hour

The thinnest cold HI clouds in the diffuse ISM: II phase

We request 160 hours of observing time to study the new population of cold neutral medium (CNM) clouds. These clouds were discovered last year as having HI column densities 50 times below theoretical and observational expectations. Physical processes responsible for the production of low-column-density clouds are not understood, several interesting theoretical suggestions have been proposed very recently. This is the second and final phase of our successful observing program a2052 which had a high detection rate and showed that the newly discovered CNM clouds are surprisingly common in the interstellar medium. Our aim is to build a proper statistical sample that can be compared with recent theoretical and numerical predictions.

Name Snezana Stanimirovic

Institution UW Madison

E-mail sstanimi@astro.wisc.edu

Phone 6088901458

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:

none

RFI Considerations

1


Frequency Ranges Planned
1420-1700

2