The Hubble Tuning Fork Strikes A New Note

Details The Hubble Tuning Fork Strikes A New Note The Hubble Tuning Fork Strikes A New Note

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004assl..319...15b&link_type=abstract

Penetrating bars through masks of cosmic dust : the Hubble tuning fork strikes a new note, Proceedings of a conference held at P

Astronomy and Astrophysics

Astrophysics

3

Galaxies: Spiral, Structure, Kinematics And Dynamics, High Redshift - Methods: Numerical

Scientific paper

Astronomer have for decades referred to the Hubble tuning fork. We show that the actual originator of the Tuning Fork is that of Sir James Jeans. We next focus our attention on the duality of spiral structure and the temporal evolution of bars in our local Universe. Next, we present deep-IR observations of M33, which show gargantuan arcs of thermally pulsing asymptotic giant branch carbon stars; we attribute this intermediate age stellar population in the outer disk, to accretion of gas in the disk building process. We then consider power spectra of galaxies and Kolmogorov turbulence in gaseous population I disks and the fractal nature of Population II disks. In particular, power spectra may serve as excellent diagnostics of the regime wherein vertical and horizontal gravitational instabilities in stellar disks are coupled. Finally, we argue that quantitative dust-penetrated templates for galaxies in our local Universe may also serve as excellent templates for galaxies at higher-z, because of the duality of spiral structure expected from gaseous to stellar disks.

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