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Proposal Identication No.: A1790 Date Received: 2003-Mar-06 03:28:33
Technical Page
Proposal Type: Short
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Galactic
Total Time Requested: 1 Hours
Proposal Title: Shocked molecular gas in the supernova remnant W44
ABSTRACT:
The radio-bright supernova remnant W44 has been found to be interacting with a molecular cloud that surrounds
it and from which its progenitor star likely formed. Evidence of molecular cloud interaction ranges from OH 1720
MHz masers to far-infrared ne-structure lines to central, thermal X-rays. The extent of the shocked molecular gas
has been diфcult to determine. Millimeter-wave CO observations clearly show broad lines, but only over limited
angular extent and confused with unrelated foreground and background gas. The new observations proposed here
will trace the shocked molecular gas using the OH molecule, which has been recently been shown to be a relatively
"clean" tracer of molecular shocks.
Name Institution E-mail Phone Student
William T Reach SIRTF Science Cen-
ter, Caltech
reach@ipac.caltech.edu 1-626-395-8565 no
Service Observing Request Remot e Observing Request
None X No
All of the observing run. Maybe
Part of the observing run. Yes
X Queue Observing
Instrument Setup
L-wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
1664-1668
1719-1721
2