Zobrazeno 1 - 10
of 161
pro vyhledávání: '"Duschl, W."'
Context. Whether or not a self-gravitating accretion disk fragments is still an open issue. There are many different physical and numerical explanations for fragmentation, but simulations often show a non-convergent behavior for ever better resolutio
Externí odkaz:
http://hdl.handle.net/10150/625972
http://arizona.openrepository.com/arizona/handle/10150/625972
http://arizona.openrepository.com/arizona/handle/10150/625972
The circumnuclear disc (CND) orbiting the Galaxy's central black hole is a reservoir of material that can ultimately provide energy through accretion, or form stars in the presence of the black hole, as evidenced by the stellar cluster that is presen
Externí odkaz:
http://hdl.handle.net/10150/617417
http://arizona.openrepository.com/arizona/handle/10150/617417
http://arizona.openrepository.com/arizona/handle/10150/617417
Publikováno v:
A&A 588, A22 (2016)
Aims: We investigate the suitability of {\alpha}-viscosity in self-similar models for self-gravitating disks with a focus on active galactic nuclei (AGN) disks. Methods: We use a self-similar approach to simplify the partial differential equations ar
Externí odkaz:
http://arxiv.org/abs/1602.04069
We present an updated mid-infrared (MIR) versus X-ray correlation for the local active galactic nuclei (AGN) population based on the high angular resolution 12 and 18um continuum fluxes from the AGN subarcsecond MIR atlas and 2-10 keV and 14-195 keV
Externí odkaz:
http://arxiv.org/abs/1508.05065
Publikováno v:
2014MNRAS.439.1648A
We present the first subarcsecond-resolution mid-infrared (MIR) atlas of local active galactic nuclei (AGN). Our atlas contains 253 AGN with a median redshift of z=0.016, and includes all publicly available MIR imaging performed to date with ground-b
Externí odkaz:
http://arxiv.org/abs/1310.2770
We present ground-based high-spatial resolution mid-infrared (MIR) observations of 20 nearby low-luminosity AGN (LLAGN) with VLT/VISIR and the preliminary analysis of a new sample of 10 low-luminosity Seyferts observed with Gemini/Michelle. LLAGN are
Externí odkaz:
http://arxiv.org/abs/1112.1417
High spatial resolution mid-infrared (MIR) 12 \mum continuum imaging of low-luminosity active galactic nuclei (LLAGN) obtained by VLT/VISIR is presented. The goal of this investigation is to determine if the nuclear MIR emission of LLAGN is consisten
Externí odkaz:
http://arxiv.org/abs/1109.4873
Autor:
Vehoff, S., Hummel, C. A., Monnier, J. D., Tuthill, P., Nuernberger, D. E. A., Siebenmorgen, R., Chesneau, O., Duschl, W. J.
We present observations and models for one of these MYSO candidates, NGC3603 IRS 9A. Our goal is to investigate with infrared interferometry the structure of IRS 9A on scales as small as 200AU, exploiting the fact that a cluster of O and B stars has
Externí odkaz:
http://arxiv.org/abs/1009.1598
Autor:
Kunneriath, D., Witzel, G., Eckart, A., Zamaninasab, M., übel, R. Gieß, Schödel, R., Baganoff, F. K., Morris, M. R., Dovčiak, M., Duschl, W. J., García-Marín, M., Karas, V., König, S., Krichbaum, T. P., Krips, M., Lu, R. -S., Mauerhan, J., Moultaka, J., Mužić, K., Sabha, N., Najarro, F., Pott, J. -U., Schuster, K. F., Sjouwerman, L. O., Straubmeier, C., Thum, C., Vogel, S. N., Teuben, P., Weiss, A., Wiesemeyer, H., Zensus, J. A.
Publikováno v:
Astronomy and Astrophysics, Volume 517, id.A46, 2010
We report on a successful, simultaneous observation and modelling of the millimeter (mm) to near-infrared (NIR) flare emission of the Sgr A* counterpart associated with the supermassive black hole at the Galactic centre (GC). We present a mm/sub-mm l
Externí odkaz:
http://arxiv.org/abs/1008.1560
Autor:
Hoenig, S. F., Kishimoto, M., Gandhi, P., Smette, A., Asmus, D., Duschl, W., Polletta, M., Weigelt, G.
We present 8-13 micron imaging and spectroscopy of 9 type 1 and 10 type 2 AGN obtained with the VLT/VISIR instrument at spatial resolution <100 pc. The emission from the host galaxy sources is resolved out in most cases. The silicate absorption featu
Externí odkaz:
http://arxiv.org/abs/1003.0920