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Proposal Identification No.: A2013 Date Received: 2004­Oct­01 13:16:31
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub­Category: Spectroscopy
Observation Category: Galactic
Total Time Requested: 16 Hours
Proposal Title: Wideband Dynamic Spectroscopy of Coherent Radio Bursts on AD Leo
ABSTRACT:
We request radio observations to form the core of our multi­wavelength observing campaign of the red dwarf flare
star AD Leo. We propose to use the Arecibo observatory to obtain wideband dynamic spectroscopy of coherent
radio bursts with unprecedented time resolution and sensitivity. Recent observations of AD Leo with Arecibo
reveal complex structures drifting in frequency and time, and allow detailed investigation of burst properties for the
first time. Such observations seem to favor plasma emission from a beam of electrons propagating through the
corona. The combination of Arecibo observations with optical photometry and cm­wavelength recordings, means
that we can investigate the relationship between the extreme radio bursts, which require a coherent plasma physics
process, and the role of energetic particles in producing white­light flaring and higher frequency radio flares.
Name Institution E­mail Phone Student
Rachel A Osten NRAO rosten@nrao.edu (434) 296­0259 no
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
L­wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
1350­1730
This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST.
This proposal requires coordination with Punta Salinas radar within the band 1222­1381 MHz..
This proposal requires coordination with GPS L3 at 1381 MHz.
2