Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-11
Astron.Rep. 49 (2005) 250-257
Astronomy and Astrophysics
Astrophysics
Scientific paper
10.1134/1.1882783
Comparing the asymmetry coefficients and scintillation indices for observed time variations of the intensity of the radiation of extragalactic sources and the predictions of theoretical models is a good test of the nature of the observed variations. Such comparisons can be used to determine whether flux-density variations are due to scintillation in the interstellar medium or are intrinsic to the source. In the former case, they can be used to estimate the fraction of the total flux contributed by the compact component (core) whose flux-density variations are brought about by inhomogeneities in the interstellar plasma. Results for the radio sources PKS 0405-385, B0917+624, PKS 1257-336, and J1819+3845 demonstrate that the scintillating component in these objects makes up from 50% to 100% of the total flux, and that the intrinsic angular sizes of the sources at 5 GHz is 10-40 microarcseconds. The characteristics of the medium giving rise to the scintillations are presented.
Shishov V. I.
Smirnova Tatiana V.
Tyul'bashev S. A.
No associations
LandOfFree
The Asymmetry Coefficient for Interstellar Scintillation of Extragalactic Radio Sources does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Asymmetry Coefficient for Interstellar Scintillation of Extragalactic Radio Sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Asymmetry Coefficient for Interstellar Scintillation of Extragalactic Radio Sources will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-578206