Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Wolfgang J. Duschl"'
Publikováno v:
SIAM Journal on Applied Mathematics. 78:80-103
We investigate exact solutions for isothermal shock problems in different one-dimensional geometries. These solutions are given as analytical expressions if possible, or are computed using standard numerical methods for solving ordinary differential
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3314b23f29ade05af7d3a836755f246d
https://doi.org/10.1137/16m109973x
https://doi.org/10.1137/16m109973x
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 459:1721-1736
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ade60b272652bb9e716dd5c6d25cb16
https://doi.org/10.1093/mnras/stw771
https://doi.org/10.1093/mnras/stw771
Due to the non-axisymmetric potential of the central bar, in addition to their characteristic arms and bar, barred spiral galaxies form a variety of structures within the thin gas disk, such as nuclear rings, inner spirals, and dust lanes. These stru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f8c5d680900745b1e432cfcb135cccc
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 454(1):766-803
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8963bacc375a6ddbdc4e18dee90140fc
http://id.nii.ac.jp/1696/00028828/
http://id.nii.ac.jp/1696/00028828/
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 450:691-713
A new one-dimensional, dynamical model is proposed for geometrically thin, self-gravitating viscous accretion discs. The vertically integrated equations are simplified using the slow accretion limit and the monopole approximation with a time-dependen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce7e00db0518bf7671701f19f9b427e1
https://doi.org/10.1093/mnras/stv587
https://doi.org/10.1093/mnras/stv587
Context. It is still an open issue whether a self-gravitating accretion disk fragments. There are many different physical and numerical explanations for fragmentation, but simulations often show a non-convergent behavior for ever better resolution. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::063cdce908d3c52e5400f9411790ea79
http://arxiv.org/abs/1704.02193
http://arxiv.org/abs/1704.02193
Publikováno v:
Astronomy & Astrophysics. 632:A35
Aims. Our goal is to find a converged cooling limit for fragmentation in self-gravitating disks. This is especially interesting for the formation of planets, brown dwarfs or stars and the growth of black holes. While investigating the limit, we want
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06e0d209aefe4bad97222df1bba0a766
https://doi.org/10.1051/0004-6361/201936064
https://doi.org/10.1051/0004-6361/201936064
Autor:
Wolfgang J. Duschl, Marvin Blank
There is strong observational evidence indicating a time lag of order of some 100 Myr between the onset of starburst and AGN activity in galaxies. Dynamical time lags have been invoked to explain this. We extend this approach by introducing a viscous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b683a7be1dc88bcb52dae50bbd49a71
http://arxiv.org/abs/1607.06365
http://arxiv.org/abs/1607.06365
At redshifts beyond $z{\sim}1$ measuring the black hole galaxy relations proves to be a difficult task. The bright light of the AGN aggravates deconvolution of black hole and galaxy properties. On the other hand high redshift data on these relations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00bbcc12a3e80ac35e6935ffb25828c5
http://arxiv.org/abs/1604.05333
http://arxiv.org/abs/1604.05333
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abdb1f1e9021c11771ef6244b4badfbf
http://arxiv.org/abs/1602.04069
http://arxiv.org/abs/1602.04069