65 citations · 65 across the 3 of their papers we have counts for
7 papers
VLTI/VINCI observations of the nucleus of NGC 1068 using the adaptive optics system MACAO
M. Wittkowski, P. Kervella, R. Arsenault +3
We present the first near-infrared K-band long-baseline interferometric measurement of the prototype Seyfert 2 galaxy NGC 1068 with resolution lambda/B \~ 10 mas obtained with the…
Where has all the polarization gone?
E. Middelberg, A. L. Roy, U. Bach +2
We have observed the five radio galaxies NGC1052, NGC4261, Hydra A, Centaurus A and Cygnus A with polarimetric VLBI at 15 GHz to look for possible Faraday rotation in foreground ab…
Understanding Scintillation of Intraday Variables
T. Beckert, L. Fuhrmann, G. Cimo +3
Intraday Variability of compact extragalactic radio sources can be interpreted as quenched scintillation due to turbulent density fluctuations of the nearby ionized interstellar me…
Models of Polarized and Variable Radio Emission for IDV Source 0917+624
T. Beckert, A. Kraus, T. P. Krichbaum +2
We examine the power spectra of IDV and show the information, which is to be gained by wavelet analysis of light curves of the quasar 0917+624. Results for total and polarized flux…
Advection-dominated Accretion in the Galactic Center and the Appearance of Sgr A*
T. Beckert, W. J. Duschl
We present a modified description of advection-dominated accretion flows (ADAF) with a geometrical viscosity. A simplified treatment of the dynamics of the flow in the inner relati…
Diffraction-limited 76 mas Speckle Masking Observations of the Core of NGC 1068 with the SAO 6m Telescope
M. Wittkowski, Y. Balega, T. Beckert +3
We present the first K-band bispectrum speckle interferometry of NGC 1068 with an angular resolution of 76 mas (~5.5pc). This angular resolution allows us to attribute the measured…