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Proposal Identification No.:

A2199

Date Received:

2006-Feb-02 04:01:56

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: 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 CMI-enhanced 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 1-5 GHz range. The new multi-beam 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 M-dwarf and magnetically active close binaries to test this hypothesis.

Regular Astronomy Spectroscopy 24 Hours

A Search For Narrow-band Drifting Stellar Radio Bursts Associated with CMIEnhanced Emission

Name Robert L Mutel

Institution University of Iowa

E-mail robert-mutel@uiowa.edu

Phone 319-335-1950

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
L-wide Atmospheric Observation Instruments: ALFA

Sp ecial Equipment or setup: Prefer ALFA for RFI immunity - but could probably use Gregorian L-band system if ALFA unavailable 1


RFI Considerations Frequency Ranges Planned

2