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A Compact Extreme Scattering Event Cloud Toward AO 0235+164


Senkbeil, CE and Ellingsen, SP and Lovell, JEJ and Macquart, JP and Cimo, G and Jauncey, DL, A Compact Extreme Scattering Event Cloud Toward AO 0235+164, The Astrophysical Journal Letters, 672, (2) pp. L95-L98. ISSN 2041-8205 (2008) [Refereed Article]

DOI: doi:10.1086/527300


We present observations of a rare, rapid, high-amplitude extreme scattering event toward the compact BL Lac object AO 0235+ 164 at 6.65 GHz. The ESE cloud is compact; we estimate its diameter between 0.09 and 0.9 AU, with a distance of less than 3.6 kpc. Limits on the angular extent of the ESE cloud imply a minimum cloud electron density of ~4 x 103 cm-3". Based on the amplitude and timescale of the ESE observed here, we suggest that at least one of the transients reported by Bower et al. may be attributed to ESEs.

Item Details

Item Type:Refereed Article
Keywords:compact, extreme, scattering event, cloud
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Senkbeil, CE (Mr Cliff Senkbeil)
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
UTAS Author:Lovell, JEJ (Dr Jim Lovell)
ID Code:51444
Year Published:2008
Funding Support:Australian Research Council (DP0342500)
Web of Science® Times Cited:13
Deposited By:Physics
Deposited On:2008-03-19
Last Modified:2011-11-28

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