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Browsing by Author "Burkert, A."
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26Al kinematics: superbubbles following the spiral arms? : Constraints from the statistics of star clusters and HI supershells
Krause, Martin; Diehl, R.; Bagetakos, Y.; Brinks, E.; Burkert, A.; Gerhard, O.; Greiner, J.; Kretschmer, K.; Siegert, T. (2015-06-12)High energy resolution spectroscopy of the 1.8 MeV radioactive decay line of 26Al with the SPI instrument on board the INTEGRAL satellite has recently revealed that diffuse 26Al has large velocities in comparison to other ... -
Feedback by massive stars and the emergence of superbubbles. I. Energy efficiency and Vishniac instabilities
Krause, M.; Fierlinger, K.; Diehl, R.; Burkert, A.; Voss, R.; Ziegler, U. (2013-01-24)Context. Massive stars influence their environment through stellar winds, ionising radiation, and supernova explosions. This is signified by observed interstellar bubbles. Such feedback is an important factor for galaxy ... -
First Investigation of the Combined Impact of Ionizing Radiation and Momentum Winds from a Massive Star on a Self-gravitating Core
Ngoumou, J.; Hubber, D.; Burkert, A.; Dale, James (2014-12-18)Massive stars shape the surrounding interstellar matter (ISM) by emitting ionizing photons and ejecting material through stellar winds. To study the impact of the momentum from the wind of a massive star on the surrounding ... -
Galactic winds - how to launch galactic outflows in typical Lyman-break galaxies
von Glasow, W.; Krause, M.~G.~H.; Sommer-Larsen, J.; Burkert, A. (2013-09-11)We perform hydrodynamical simulations of a young galactic disc embedded in a hot gaseous halo using parameters typical for Lyman-break galaxies (LBGs). We take into account the (static) gravitational potentials due to a ... -
Gas dynamics of the central few parsec region of NGC 1068 fuelled by the evolving nuclear star cluster
Schartmann, M.; Burkert, A.; Krause, Martin; Camenzind, M.; Meisenheimer, K.; Davies, R.~I. (2010-04-21)Recently, high-resolution observations with the help of the near-infrared adaptive optics integral field spectrograph Spectrograph for INtegral Field Observations in the Near Infrared (SINFONI) at the Very Large Telescope ... -
Kinematics of massive star ejecta in the Milky Way as traced by $^26$Al
Kretschmer, K.; Diehl, R.; Krause, Martin; Burkert, A.; Fierlinger, K.; Gerhard, O.; Greiner, J.; Wang, W. (2013-11-19)Context. Massive stars form in groups and their winds and supernova explosions create superbubbles up to kpc in size. The fate of their ejecta is of vital importance for the dynamics of the interstellar medium, for chemical ... -
Magnetohydrodynamic stability of broad line region clouds
Krause, Martin; Schartmann, M.; Burkert, A. (2012-10-01)Hydrodynamic stability has been a longstanding issue for the cloud model of the broad line region in active galactic nuclei. We argue that the clouds may be gravitationally bound to the supermassive black hole. If true, ... -
Orion revisited III. The Orion Belt population
Kubiak, K.; Alves, J.; Bouy, H.; Sarro, L. M.; Ascenso, J.; Burkert, A.; Forbrich, J.; Großschedl, J.; Hacar, A.; Hasenberger, B.; Lombardi, M.; Meingast, S.; Köhler, R.; Teixeira, P. S. (2017-02-13)This paper continues our study of the foreground population to the Orion molecular clouds. The goal is to characterize the foreground population north of NGC 1981 and to investigate the star formation history in the large ... -
Radiation feedback on dusty clouds during Seyfert activity
Schartmann, M.; Krause, Martin; Burkert, A. (2011-07-21)We investigate the evolution of dusty gas clouds falling into the centre of an active Seyfert nucleus. 2D high-resolution radiation hydrodynamics simulations are performed to study the fate of single clouds and the interaction ... -
Squeezed between shells? On the origin of the Lupus I molecular cloud. - II. APEX CO and GASS HI observations
Gaczkowski, B.; Roccatagliata, V.; Flaischlen, S.; Kroell, D.; Krause, M.~G.~H.; Burkert, A.; Diehl, R.; Fierlinger, K.; Ngoumou, J.; Preibisch, T. (2017-12-12)Context. The Lupus I cloud is found between the Upper-Scorpius (USco) and the Upper-Centaurus-Lupus (UCL) sub-groups of the Scorpius-Centaurus OB-association, where the expanding USco H I shell appears to interact with a ... -
Squeezed between shells? The origin of the Lupus I molecular cloud. APEX/LABOCA, Herschel, and Planck observations
Gaczkowski, B.; Preibisch, T.; Stanke, T.; Krause, M.~G.~H.; Burkert, A.; Diehl, R.; Fierlinger, K.; Kroell, D.; Ngoumou, J.; Roccatagliata, V. (2015-12-01)Context. The Lupus I cloud is found between the Upper Scorpius (USco) and the Upper Centaurus-Lupus (UCL) subgroups of the Scorpius-Centaurus OB association, where the expanding USco H I shell appears to interact with a ... -
Stability of cloud orbits in the broad-line region of active galactic nuclei
Krause, M.; Burkert, A.; Schartmann, M. (2011-02-11)We investigate the global dynamic stability of spherical clouds in the broad-line region (BLR) of active galactic nuclei (AGN), exposed to radial radiation pressure, gravity of the central black hole (BH) and centrifugal ... -
Stellar feedback efficiencies: supernovae versus stellar winds
Fierlinger, K.~M.; Burkert, A.; Ntormousi, E.; Fierlinger, P.; Schartmann, M.; Ballone, A.; Krause, M.~G.~H.; Diehl, R. (2016-02-11)Stellar winds and supernova (SN) explosions of massive stars (`stellar feedback') create bubbles in the interstellar medium (ISM) and insert newly produced heavy elements and kinetic energy into their surroundings, possibly ...