A Multi-Frequency VLBA Survey of Interstellar Scattering in the Cygnus X Region

Details A Multi-Frequency VLBA Survey of Interstellar Scattering in the Cygnus X Region A Multi-Frequency VLBA Survey of Interstellar Scattering in the Cygnus X Region

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.4613m&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #46.13; Bulletin of the American Astronomical Society, Vol. 30, p.879

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We describe the results of a multi-frequency VLBA study of the scatter-broadened images of fifteen compact extragalactic sources. The sources are located along lines of sight which intercept the Cygnus X superbubble. We have used the phase structure function to determine the spatial spectrum of turbulence with high SNR on scales from 100 to 6,000 km. We will discuss evidence for detection of an inner scale length along some lines of sight as well as excess visibility amplitude for projected baseline lengths much greater than the diffractive scale. We also find that most scattered-broadened images are significantly elliptical with orientations which may be related to the large-scale magnetic field orientation in the Cygnus superbubble.

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