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Proposal Identification No.:

A2060

Date Received:

2006-Feb-01 21:41:42

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Large Astronomy Spectroscopy Galactic 350 Hours

A GALFA Study of the Disk-Halo Interface

The path of baryons as they flow from the intergalactic medium into the disks of galaxies remains a key unknown in models of galaxy formation and ev olution. How does the intergalactic gas cool in galactic halos?How do galaxies smoothly integrate this incoming material into the galactic disk to form stars?How much of this gas is subsequently expelled into the halo as hot gas?Our Galaxy represents the only place where these phenomena can be closely examined. Here, we propose a survey of two high-velocity cloud complexes at the disk/halo interface accessible by Arecibo, Complex C and the Anti-Center Com plex. We will begin this survey with observations of the tail of Complex C, a large high-velocity cloud and a key tracer of the accretion of gas onto the Milky Way.

Name Mary E Putman

Institution University of Michigan

E-mail mputman@umich.edu

Phone 734-764-3408

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
ALFA Atmospheric Observation Instruments:

Sp ecial Equipment or setup: GALFA spectrometer

RFI Considerations
1


Frequency Ranges Planned
1370 - 1470 This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

2