Zobrazeno 1 - 10
of 179
pro vyhledávání: '"Beckert, T."'
Autor:
Britzen, S., Kudryavtseva, N. A., Witzel, A., Campbell, R. M., Ros, E., Karouzos, M., Mehta, A., Aller, M. F., Aller, H. D., Beckert, T., Zensus, J. A.
We present a kinematic analysis of jet component motion in the VLBI jet of the BL Lac object S5 1803+784, which does not reveal long-term outward motion for most of the components. Understanding the complex kinematic phenomena can possibly provide in
Externí odkaz:
http://arxiv.org/abs/1001.1973
We report multi-frequency circular polarization measurements for the four extragalactic radio sources 0056-00, 0716+71, 3C138 and 3C161 taken at the Effelsberg 100-m radiotelescope. The data reduction is based on a new calibration procedure that allo
Externí odkaz:
http://arxiv.org/abs/0901.4678
Recent VLT SINFONI observations of the close environments (~30pc) of nearby AGNs have shown that thick gas tori and starbursts with ages between 10 and 150Myr are frequently found. By applying these observations to a previously established analytical
Externí odkaz:
http://arxiv.org/abs/0809.3397
Autor:
Malbet, F., Buscher, D., Weigelt, G., Garcia, P., Gai, M., Lorenzetti, D., Surdej, J., Hron, J., Neuhaeuser, R., Kern, P., Jocou, L., Berger, J. -P., Absil, O., Beckmann, U., Corcione, L., Duvert, G., Filho, M., Labeye, P., Coarer, E. Le, Causi, G. Li, Lima, J., Perraut, K., Tatulli, E., Thiebaut, E., Young, J., Zins, G., Amorim, A., Aringer, B., Beckert, T., Benisty, M., Bonfils, X., Cabral, A., Chelli, A., Chesneau, O., Chiavassa, A., Corradi, R., de Becker, M., Delboulbe, A., Duchene, G., Forveille, T., Haniff, C., Herwats, E., Hofmann, K. -H., Bouquin, J. -B. Le, Ligori, S., Loreggia, D., Marconi, A., Moitinho, A., Nisini, B., Petrucci, P. -O., Rebordao, J., Speziali, R., Testi, L., Vitali, F.
The VLTI Spectro Imager (VSI) was proposed as a second-generation instrument of the Very Large Telescope Interferometer providing the ESO community with spectrally-resolved, near-infrared images at angular resolutions down to 1.1 milliarcsecond and s
Externí odkaz:
http://arxiv.org/abs/0807.1062
Autor:
Hoenig, S. F., Smette, A., Beckert, T., Horst, H., Duschl, W., Gandhi, P., Kishimoto, M., Weigelt, G.
We present the discovery of a Baldwin effect in 8 nearby Seyfert galaxies for the three most prominent mid-infrared forbidden emission lines observable from the ground that are commonly found in AGN, [ArIII](8.99 micron), [SIV](10.51 micron), and [Ne
Externí odkaz:
http://arxiv.org/abs/0805.2151
Autor:
Malbet, F., Buscher, D., Weigelt, G., Garcia, P., Gai, M., Lorenzetti, D., Surdej, J., Hron, J., Neuhäuser, R., Kern, P., Jocou, L., Berger, J. -P., Absil, O., Beckmann, U., Corcione, L., Duvert, G., Filho, M., Labeye, P., Coarer, E. Le, Causi, G. Li, Lima, J., Perraut, K., Tatulli, E., Thiébaut, E., Young, J., Zins, G., Amorim, A., Aringer, B., Beckert, T., Benisty, M., Bonfils, X., Chelli, A., Chesneau, O., Chiavassa, A., Corradi, R., De Becker, M., Delboulbé, A., Duchêne, G., Forveille, T., Haniff, C., Herwats, E., Bouquin, J. -B. Le, Ligori, S., Loreggia, D., Marconi, A., Moitinho, A., Nisini, B., Petrucci, P. -O., Rebordao, J., Speziali, R., Testi, L., Vitali, F.
Nowadays, compact sources like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei can be investigated at milli-arcsecond scales only with the VLT in its
Externí odkaz:
http://arxiv.org/abs/0801.2694
We present 3-dimensional radiative transfer models for clumpy dust tori around AGN. Our method combines Monte Carlo simulations of individual dust clouds with the actual 3-dimensional distribution of clouds in the torus. The model has been applied to
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611946
Publikováno v:
Astron.Astrophys. 452 (2006) 459-471
Recent observations of NGC 1068 and other AGN support the idea of a geometrically and optically thick dust torus surrounding the central supermassive black hole and accretion disk of AGN. In type 2 AGN, the torus is seen roughly edge-on, leading to o
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602494
Publikováno v:
Astron.Astrophys. 418 (2004) L39-L42
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 Very Large Telescope Interferometer (VLTI) and the two 8.2m Unit Teles
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403497
Publikováno v:
Astron.Astrophys. 413 (2004) 949-957
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 explained by a collisional model consisting of quasi-stable, self-gra
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310329