Zobrazeno 1 - 10
of 524
pro vyhledávání: '"Binney, James"'
Autor:
Binney, James
We revisit the dynamics of razor-thin, stone-cold, self-gravitating discs. By recasting the equations into standard cylindrical coordinates, the linearised vertical dynamics of an exponential disc can be followed for several gigayears on a laptop in
Externí odkaz:
http://arxiv.org/abs/2411.04879
Autor:
Binney, James, Vasiliev, Eugene
A chemodynamical model of our galaxy is fitted to data from DR17 of the APOGEE survey supplemented with data from the StarHorse catalogue and gaia DR3. Dynamically, the model is defined by action-based distribution functions for dark matter and six s
Externí odkaz:
http://arxiv.org/abs/2306.11602
Autor:
Binney, James, Vasiliev, Eugene
A new class of models of stellar discs is introduced and used to build a self-consistent model of our Galaxy. The model is defined by the parameters that specify the action-based distribution functions (DFs) f(J) of four stellar discs (three thin-dis
Externí odkaz:
http://arxiv.org/abs/2206.03523
Autor:
Li, Chengdong, Binney, James
We investigate the structure of our Galaxy's young stellar disc by fitting the distribution functions (DFs) of a new family to five-dimensional Gaia data for a sample of $47\,000$ OB stars. Tests of the fitting procedure show that the young disc's DF
Externí odkaz:
http://arxiv.org/abs/2205.01455
Autor:
Li, Chengdong, Binney, James
A seven-parameter distribution function (DF) is fitted to $20\,000$ RR-Lyrae stars for which only astrometric data are available. The observational data are predicted by the DF in conjunction with the gravitational potential of a self-consistent mode
Externí odkaz:
http://arxiv.org/abs/2109.02324
Autor:
Lau, Jun Yan, Binney, James
Observed clusters should be modelled by considering the distribution function to be a random variable that quantifies the degree of excitation of the system's normal modes. A system of canonical coordinates for the space of DFs is identified so DFs c
Externí odkaz:
http://arxiv.org/abs/2107.06298