Search for discrete refractive scattering events

Citation
R. Ramachandran et al., Search for discrete refractive scattering events, ASTRON ASTR, 364(2), 2000, pp. L71-L74
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
0004-6361 → ACNP
Volume
364
Issue
2
Year of publication
2000
Pages
L71 - L74
Database
ISI
SICI code
0004-6361(200012)364:2<L71:SFDRSE>2.0.ZU;2-H
Abstract
We have searched for discrete refractive scattering events (including effec ts due to possible non-multiple diffractive scattering) at meter wavelength s in the direction of two close by pulsars B0950+08 and B1929+10, where we looked for spectral signatures associated with the multiple imaging of puls ars due to scattering in the interstellar medium. We do not find any signat ures of such events in the direction of either source over a spectral perio dicity range of 50 KHz to 5 MHz. Our analysis puts strong upper limits on t he column density contrast associated with a range of spatial scales of the interstellar electron density irregularities along these lines of sight.