Zobrazeno 1 - 10
of 272
pro vyhledávání: '"Lubow, Stephen"'
With three-dimensional hydrodynamical simulations we show that the size of the decretion disc and the structure of the accretion flow onto the neutron star in a Be/X-ray binary strongly depends upon the disc aspect ratio, $H/R$. We simulate a Be star
Externí odkaz:
http://arxiv.org/abs/2404.17976
We analyze a tilt instability of the orbit of an outer planet in a two planet circumbinary system that we recently reported. The binary is on an eccentric orbit and the inner circumbinary planet is on a circular polar orbit that causes the the binary
Externí odkaz:
http://arxiv.org/abs/2404.10080
Autor:
Childs, Anna C., Martin, Rebecca G., Nixon, C. J., Geller, Aaron M., Lubow, Stephen H., Zhu, Zhaohuan, Lepp, Stephen
We study the effects of general relativity (GR) on the evolution and alignment of circumbinary disks around binaries on all scales. We implement relativistic apsidal precession of the binary into the hydrodynamics code {\sc phantom}. We find that the
Externí odkaz:
http://arxiv.org/abs/2312.09495
With hydrodynamic simulations we show that a coplanar disc around one component of a binary can be unstable to global tilting when the disc orbits in a retrograde direction relative to the binary. The disc experiences the largest inclination growth r
Externí odkaz:
http://arxiv.org/abs/2311.10864
We examine the geometry of the post-asymptotic giant branch (AGB) star binary AC Her and its circumbinary disk. We show that the observations describe a binary orbit that is perpendicular to the disk with an angular momentum vector that is within $9^
Externí odkaz:
http://arxiv.org/abs/2310.19600
The dominant mechanism for generating free-floating planets has so far remained elusive. One suggested mechanism is that planets are ejected from planetary systems due to planet-planet interactions. However, instability around a single star requires
Externí odkaz:
http://arxiv.org/abs/2310.15603
Disc warping, and possibly disc breaking, has been observed in protoplanetary discs around both single and multiple stars. Large warps can break the disc, producing multiple observational signatures. In this work, we use comparisons of disc timescale
Externí odkaz:
http://arxiv.org/abs/2310.00459
We use numerical simulations of circumplanetary disks to determine the boundary between disks that are radially truncated by the tidal potential, and those where gas escapes the Hill sphere. We consider a model problem, in which a coplanar circumplan
Externí odkaz:
http://arxiv.org/abs/2306.17532
We report the analysis of circumbinary discs formed in a radiation hydrodynamical simulation of star cluster formation. We consider both pure binary stars and pairs within triple and quadruple systems. The protostellar systems are all young (ages < $
Externí odkaz:
http://arxiv.org/abs/2306.06035
With $n$-body simulations we investigate the stability of tilted circumbinary planetary systems consisting of two nonzero mass planets. The planets are initially in circular orbits that are coplanar to each other, as would be expected if they form in
Externí odkaz:
http://arxiv.org/abs/2303.05379