Zobrazeno 1 - 10
of 47
pro vyhledávání: '"John Dubinski"'
Autor:
John Dubinski
The disruption of an icy moon in a collision with an interloping comet a few hundred million years ago is a simple way to create Saturn's rings. A ring parent moon with a mass comparable to Mimas could be trapped in mean motion resonance with Encelad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4612b80fe0b63c741ba4ba9c2f3911e1
http://arxiv.org/abs/1709.08768
http://arxiv.org/abs/1709.08768
Autor:
Rodrigo A. Ibata, Geraint F. Lewis, Alan W. McConnachie, Mike Irwin, Aaron Dotter, John Dubinski, Annette M. N. Ferguson, Lawrence M. Widrow
Publikováno v:
The Astrophysical Journal. 723:1038-1052
We have surveyed $\sim40$sq.degrees surrounding M33 with CFHT MegaCam in the g and i filters, as part of the Pan-Andromeda Archaeological Survey. Our observations are deep enough to resolve the top 4mags of the red giant branch population in this gal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d33e8692b9e15b08ae34a0b43f083ae
https://doi.org/10.1088/0004-637x/723/2/1038
https://doi.org/10.1088/0004-637x/723/2/1038
Publikováno v:
The Astrophysical Journal. 653:1180-1193
We investigate the evolution of a population of 100 dark matter satellites orbiting in the gravitational potential of a realistic model of M31. We find that after 10 Gyr, seven subhalos are completely disrupted by the tidal field of the host galaxy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::414497d1063a643daf5cfe89e045529e
https://doi.org/10.1086/508860
https://doi.org/10.1086/508860
Publikováno v:
New Astronomy. 9:111-126
We describe a parallel, cosmological N-body code based on a hybrid scheme using the particle-mesh (PM) and Barnes-Hut (BH) oct-tree algorithm. We call the algorithm GOTPM for Grid-of-Oct-Trees-Particle-Mesh. The code is parallelized using the Message
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3466c0d54d4d25f78e76a1f370d27afc
https://doi.org/10.1016/j.newast.2003.08.002
https://doi.org/10.1016/j.newast.2003.08.002
Autor:
Yannick Mellier, Tong-Jie Zhang, Ludovic Van Waerbeke, Pengjie Zhang, John Dubinski, Ue-Li Pen
Publikováno v:
The Astrophysical Journal
The Astrophysical Journal, 2003, 592, pp.664-673. ⟨10.1086/375734⟩
The Astrophysical Journal, 2003, 592, pp.664-673. ⟨10.1086/375734⟩
Weak gravitational lensing provides a direct statistical measure of the dark matter distribution. The variance is easiest to measure, which constrains the degenerate product \sigma_8\Omega^0.6. The degeneracy is broken by measuring the skewness arisi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfc25ce3e0394c708cdab0643a552d88
https://doi.org/10.1086/375734
https://doi.org/10.1086/375734
Publikováno v:
Symposium - International Astronomical Union. 208:237-244
We report on recent numerical investigations of the dynamical evolution of galaxies in clusters. Simulations of spiral galaxies falling into forming clusters show the development of the morphology-density relationship and the formation of regular and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96fe5e4905520c13735fc6c69889b7a3
https://doi.org/10.1017/s0074180900207195
https://doi.org/10.1017/s0074180900207195
Publikováno v:
The Astrophysical Journal. 526:607-622
We present an extensive parameter survey to study the influence of halo mass profiles on the development of tidal tails in interacting disk galaxies. We model the galaxies using a fixed exponential disk with a central bulge and vary the halo potentia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec98a73503e3d1bd750313a29f132447
https://doi.org/10.1086/308024
https://doi.org/10.1086/308024
Autor:
Lawrence M. Widrow, John Dubinski
Publikováno v:
The Astrophysical Journal. 504:12-26
We conduct gravitational microlensing experiments in a galaxy taken from a cosmological N-body simulation. Hypothetical observers measure the optical depth and event rate toward hypothetical LMCs and compare their results with model predictions. Sinc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e537dd401ed841d3c6fb1bc00c2ca6b
https://doi.org/10.1086/306050
https://doi.org/10.1086/306050
Publikováno v:
The Astrophysical Journal. 494:183-193
We examine the effect of different dark matter halo potentials on the morphology and kinematics of tidal tails in a merger model of NGC 7252. We find that models of merging galaxies with low halo masses of Mh ~ 4-8 Mdisk+bulge (Mdb) can fit the obser
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc5a15e9ef74d6a587ee482aefd62f5c
https://doi.org/10.1086/305179
https://doi.org/10.1086/305179
Observations consistently show that elliptical galaxies follow a tight "fundamental plane" scaling relation between size, mean surface brightness and velocity dispersion, with the form $R \propto \sigma^{a}\mu^{b}$. This relation not only has very sm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f9111ecb355d0ebeb64f9257473c45a