University of Iowa

Observations of the four Stokes parameters of a 430 MHz flare from the UV Ceti-type star AD Leonis are presented. The maximum amplitude of the event was 0.52 flux units and the durations at one-half and one-tenth maximum were 12 and 40 seconds, respectively. The degree of circular polarization at maximum intensity was approximately 56 percent and was later observed to be as high as 92 percent. Linear polarization was also observed at a level of about 21 percent ht flare maximum which 2 allowed an upper limit of 440 radians - m to be placed on the rotation measure.

• Publication year

  1888

• Venue

  The Dental register

• Publication date

  1888-07-01

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1097/00005053-194205000-00044PMID 33699322PMCID 6923092
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• Polarization measurements found circular polarization near 56% at peak intensity, later increasing to 92%, and linear polarization near 21% at flare maximum constrained the rotation measure to below 440 radians m^-2.

  Confidence 0.96

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• Measurements at 430 MHz of the AD Leonis flare reported a maximum amplitude of 0.52 flux units and durations of 12 s at half-maximum and 40 s at one-tenth maximum.

  Confidence 0.95

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review

• 430 mhz

  frequency

  The radio observing frequency used for the flare measurements.

  Aliases: 430 megahertz

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• ad leonis

  astronomical object

  The UV Ceti-type star on which the flare was observed.

  Aliases: AD Leo

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• circular polarization

  physical property

  The fraction of the flare signal polarized in a circular sense.

  Aliases: CP

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• flare event

  event

  The radio flare occurrence observed on AD Leonis and analyzed in the paper.

  Aliases: flare

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• linear polarization

  physical property

  The fraction of the flare signal polarized in a linear sense.

  Aliases: LP

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• rotation measure

  physical quantity

  A line-of-sight Faraday rotation quantity constrained from the observed polarization.

  Aliases: RM

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• stokes parameters

  measurement parameter

  The set of polarization descriptors measured for the flare signal.

  Aliases: Stokes IQUV

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review

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