Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Steven A. Balbus"'
Autor:
Ph. Podsiadlowski, Ruediger Pakmor, Friedrich K. Röpke, Sebastian T. Ohlmann, Steven A. Balbus, Fabian Schneider
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 495:2796-2812
About 10% of stars more massive than ${\approx}\,1.5\,\mathrm{M}_\odot$ have strong, large-scale surface magnetic fields and are being discussed as progenitors of highly-magnetic white dwarfs and magnetars. The origin of these fields remains uncertai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce5be96ef1fa3e2c758803fcebd1e118
https://doi.org/10.1093/mnras/staa1326
https://doi.org/10.1093/mnras/staa1326
Autor:
Steven A. Balbus, Andrew Mummery
We extend the relativistic time-dependent thin-disc TDE model to describe nonthermal ($2-10$ keV) X-ray emission produced by the Compton up-scattering of thermal disc photons by a compact electron corona, developing analytical and numerical models of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8afd26ea469f80e8b7643dde6c5b8c1a
https://ora.ox.ac.uk/objects/uuid:138d8d47-87be-4c64-81ef-4111827a7c1c
https://ora.ox.ac.uk/objects/uuid:138d8d47-87be-4c64-81ef-4111827a7c1c
Autor:
Steven A. Balbus
A very simple and physical derivation of the conservation equation for the propagation of gravitational radiation is presented. The formulation is exact. The result takes the readily recognisable and intuitive form of a Poynting-style equation, in wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26c13cc5be11708d78e30bc4583fc1c5
http://arxiv.org/abs/2109.04163
http://arxiv.org/abs/2109.04163
Autor:
Steven A. Balbus, Andrew Mummery
We comprehensively model the X-ray luminosity emergent from time dependent relativistic accretion discs, developing analytical models of the X-ray luminosity of thermal disc systems as a function of black hole mass $M$, disc mass $M_d$, and disc $\al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78fa393f6b22ebede0fac56fe479b106
http://arxiv.org/abs/2104.06177
http://arxiv.org/abs/2104.06177
Publikováno v:
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 476
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19521174d8abd73050cebf30bf698324
https://doi.org/10.1098/rspa.2020.0846
https://doi.org/10.1098/rspa.2020.0846
Publikováno v:
Journal of Plasma Physics. 86
The fundamental difference between incompressible ideal magnetohydrodynamics and the dynamics of a non-conducting fluid is that magnetic fields exert a tension force that opposes their bending; magnetic fields behave like elastic strings threading th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8df40da65aab09c5987460f6e06e7786
https://doi.org/10.1017/s0022377820001191
https://doi.org/10.1017/s0022377820001191
Autor:
Andrew Mummery, Steven A. Balbus
We model the light curves of the novel and extremely luminous transient ASASSN-15lh at nine different frequencies, from infrared to ultra-violet photon energies, as an evolving relativistic disc produced in the aftermath of a tidal disruption event.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::989af163f0ad9c5d4120078c473aa2c9
https://doi.org/10.1093/mnrasl/slaa105
https://doi.org/10.1093/mnrasl/slaa105
Publikováno v:
Proc Math Phys Eng Sci
Tides are a major component of the interaction between the marine and terrestrial environments, and thus play an important part in shaping the environmental context for the evolution of shallow marine and coastal organisms. Here, we use a dedicated t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30cb63f4529ae7d11ed321bf75bf8ef8
https://pubmed.ncbi.nlm.nih.gov/33363445
https://pubmed.ncbi.nlm.nih.gov/33363445
Autor:
Steven A. Balbus
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 471:4832-4838
In the classical theory of thin disc accretion discs, the constraints of mass and angular momentum conservation lead to a diffusion-like equation for the turbulent evolution of the surface density. Here, we revisit this problem, extending the Newtoni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f600292abe67533b107f61c6fe6a69b
https://doi.org/10.1093/mnras/stx1955
https://doi.org/10.1093/mnras/stx1955
Autor:
Steven A. Balbus
Publikováno v:
Journal of Fluid Mechanics. 824:1-4
Rotating flow in which the angular velocity decreases outward while the angular momentum increases is known as ‘quasi-Keplerian’. Despite the general tendency of shear flow to break down into turbulence, this type of flow seems to maintain stabil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99107a3a1b907051d964cfb59f82eaa1
https://doi.org/10.1017/jfm.2017.327
https://doi.org/10.1017/jfm.2017.327