Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/StanimirovictagA2770tp.pdf Дата изменения: Thu Sep 20 00:06:00 2012 Дата индексирования: Tue Feb 5 01:42:26 2013 Кодировка: Поисковые слова: ion drive

Proposal Identification No.:

A2770

Date Received:

2012-Aug-30 17:58:54

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Galactic 53 Hours 1 hour 15 min

High-sensitivity HI emission measurements to complement 21-SPONGE

21-SPONGE (21-cm SPectral line Observations of Neutral Gas with the EVLA) is an ongoing VLA large pro ject dedicated to constraining the initial conditions for the formation of the cold neutral medium (CNM), which is a necessary stage in star formation. By achieving extremely high sensitivity, with rms noise in optical depth 5e-4, this survey is undertaking a statistical study of the properties of neutral gas over the full temperature range 10-10000 K. In particular, 21-SPONGE will for the first time characterize basic properties of the warm neutral medium (WNM) such as temperature, column density, and abundance relative to the CNM, via direct detections in absorption. After completion, we will produce absorption spectra in the direction of 59 high-latitude radio continuum sources. In order to derive spin temperatures along each line of sight, we require highly sensitive matching emission spectra at similar high resolution, which we propose here to acquire using the Arecibo telescope.

Name Snezana Stanimirovic

Institution University of Wisconsin- Madison

E-mail sstanimi@astro.wisc.edu

Phone (608) 890-1458

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 1


RFI Considerations Frequency Ranges Planned
1420-1720 MHz This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST.

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