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pro vyhledávání: '"Owocki, Stanley"'
We present results from new self-consistent 3D MHD simulations of the magnetospheres from massive stars with a dipole magnetic axis that has a non-zero obliquity angle ($\beta$) to the star's rotation axis. As an initial direct application, we compar
Externí odkaz:
http://arxiv.org/abs/2301.11858
Autor:
Owocki, Stanley P, Shultz, Matt E., ud-Doula, Asif, Chandra, Poonam, Das, Barnali, Leto, Paulo
Magnetic B-stars often exhibit circularly polarized radio emission thought to arise from gyrosynchrotron emission by energetic electrons trapped in the circumstellar magnetosphere. Recent empirical analyses show that the onset and strength of the obs
Externí odkaz:
http://arxiv.org/abs/2202.05449
Autor:
Hirai, Ryosuke, Podsiadlowski, Philipp, Owocki, Stanley P., Schneider, Fabian R. N., Smith, Nathan
$\eta$ Carinae is an extraordinary massive star famous for its 19th century Great Eruption and the surrounding Homunculus nebula ejected in that event. The cause of this eruption has been the centre of a long-standing mystery. Recent observations, in
Externí odkaz:
http://arxiv.org/abs/2011.12434
Autor:
Owocki, Stanley P., Shultz, Matt E., ud-Doula, Asif, Sundqvist, Jon O., Townsend, Richard H. D., Cranmer, Steven R.
Strongly magnetic B-type stars with moderately rapid rotation form `centrifugal magnetospheres' (CMs), from the magnetic trapping of stellar wind material in a region above the Kepler co-rotation radius. A longstanding question is whether the eventua
Externí odkaz:
http://arxiv.org/abs/2009.12359
Motivated by the eruptive mass loss inferred from Luminous Blue Variable (LBV) stars, we present 1D hydrodynamical simulations of the response from sudden energy injection into the interior of a very massive ($100 \, M_\odot$) star. For a fiducial ca
Externí odkaz:
http://arxiv.org/abs/1902.06220
We present results of simulations to assess the feasibility of modeling outflows from massive stars using the Los Alamos 3-D radiation hydrodynamics code Cassio developed for inertial confinement fusion (ICF) applications. We find that a 1-D stellar
Externí odkaz:
http://arxiv.org/abs/1806.00691
Spectropolarimetric surveys reveal that 8-10\% of OBA stars harbor large-scale magnetic fields, but thus far no such fields have been detected in any classical Be stars. Motivated by this, we present here MHD simulations for how a pre-existing Kepler
Externí odkaz:
http://arxiv.org/abs/1805.03001
Autor:
Owocki, Stanley P., Sundqvist, Jon O.
We analyze recent 2D simulations of the nonlinear evolution of the line-deshadowing instability (LDI) in hot-star winds, to quantify how the associated highly clumped density structure can lead to a "turbulent porosity" reduction in continuum absorpt
Externí odkaz:
http://arxiv.org/abs/1712.03457
Autor:
Owocki, Stanley P., Cranmer, Steven R.
In the subset of luminous, early-type stars with strong, large-scale magnetic fields and moderate to rapid rotation, material from the star's radiatively driven stellar wind outflow becomes trapped by closed magnetic loops, forming a centrifugally su
Externí odkaz:
http://arxiv.org/abs/1711.05414
We derive semi-analytic solutions for optically thick, super-Eddington stellar winds, induced by an assumed steady energy addition $\Delta {\dot E}$ concentrated around a near-surface heating radius $R$ in a massive star of central luminosity $L_\ast
Externí odkaz:
http://arxiv.org/abs/1708.07790