84 citations · 168 across the 5 of their papers we have counts for
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Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71, III. Rapid and correlated flux density variability from radio to sub-mm bands
L. Fuhrmann, T. P. Krichbaum, A. Witzel +22
The BL Lac object S5 0716+71 was observed in a global multi-frequency campaign to search for rapid and correlated flux density variability and signatures of an inverse-Compton (IC)…
6.7 GHz methanol absorption toward the Seyfert 2 galaxy NGC 3079
C. M. V. Impellizzeri, C. Henkel, A. L. Roy +1
The detection of the 6.7 GHz line of methanol (CH3OH) is reported for the first time toward an object beyond the Magellanic Clouds. Using the Effelsberg 100 m telescope, two absorp…
Space VLBI polarimetry of IDV sources: Lessons from VSOP and prospects for VSOP2
U. Bach, T. P. Krichbaum, S. Bernhart +5
To locate and image the compact emission regions in quasars, which are closely connected to the phenomenon of IntraDay Variability (IDV), space VLBI observations are of prime impor…
Molecular tori in AGN: a search using excited states of OH
C. M. Violette Impellizzeri, Alan L. Roy, Christian Henkel
One of the fundamental concepts in the unified scheme of AGN is that both Seyfert 1 and Seyfert 2 galaxies harbour supermassive nuclear engines blocked from direct view by an optic…
From the Circumnuclear Disk in the Galactic Center to thick, obscuring tori of AGNs
B. Vollmer, T. Beckert, W. J. Duschl
We compare three different models of clumpy gas disk and show that the Circumnuclear Disk (CND) in the Galactic Center and a putative, geometrically thick, obscuring torus are best…