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Proposal Identification No.: A2199 Date Received: 2006­Feb­02 04:01:56
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub­Category: Spectroscopy
Observation Category:
Total Time Requested: 24 Hours
Proposal Title: A Search For Narrow­band Drifting Stellar Radio Bursts Associated with CMI­
Enhanced Emission
ABSTRACT:
Recent advances in cyclotron maser instability (CMI) theory, driven by observations of auroral kilometric radiation,
have led to a renewed interest in whether this mechanism can also explain some radio bursts from magnetically
active stars. The key idea is that the CMI mechanism is much more robust than previously thought, and that the
requisite conditions for CMI­enhanced radiation in enhanced stellar magnetospheres should be common. A critical
test of this hypothesis is the detection of narrowband, highly polarized drifting bursts at the local electron
cyclotron frequency, which for magnetically active stars lie in 1­5 GHz range. The new multi­beam ALFA system,
along with the improved sensitivity of the Gregorian system, for the first time allows adequate sensitivity and RFI
immunity to pursue a search for such bursts. We propose a spectroscopic radio survey of a variety of M­dwarf and
magnetically active close binaries to test this hypothesis.
Name Institution E­mail Phone Student
Robert L Mutel University of Iowa robert­mutel@uiowa.edu 319­335­1950 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
L­wide ALFA
Atmospheric Observation Instruments:
Special Equipment or setup: Prefer ALFA for RFI immunity ­ but could probably use Gregorian
L­band system if ALFA unavailable
1

RFI Considerations
Frequency Ranges Planned
2