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Proposal Identication No.: A1725 Date Received: 2003-Oct-01 14:23:26
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 55 Hours
Proposal Title: Super Star Clusters: The Missing Link Between Galactic OH Masers and OH
Megamasers
ABSTRACT:
We propose to observe the four 18 cm OH transitions in a sample of nearby star forming galaxies known to host
dozens to hundreds of young compact star clusters. The target sample spans a wide range of starburst ages, masses,
environments, and host galaxy types. The star clusters in these galaxies are likely to produce OH masers, and the
18 cm line ratios can determine whether the masers associated with super star clusters represents scaled-up
Galactic masers or scaled-down OH megamasers. In either case, detection of OH masing will identify a powerful
diagnostic and tracer of highly obscured star formation and possibly proto globular clusters and intermediate mass
black holes. Failure to detect OH emission lines in this sensitive survey would be a surprising but very informative
result, indicating that there is no intermediate regime between Galactic-style masing associated with compact HII
regions and OH megamasers.
Name Institution E-mail Phone Student
Jeremy Darling Carnegie Observato-
ries
darling@ociw.edu 626 304 0256 no
Service Observing Request Remot e Observing Request
X None No
All of the observing run. X Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
L-wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
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RFI Considerations
Frequency Ranges Planned
1577-1720
This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST.
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