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The Hubble Tuning Fork Strikes a New Note

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Penetrating Bars through Masks of Cosmic Dust

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 319))

Abstract

Astronomers 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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© 2004 Springer Science+Business Media New York

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Block, D.L. et al. (2004). The Hubble Tuning Fork Strikes a New Note. In: Block, D.L., Puerari, I., Freeman, K.C., Groess, R., Block, E.K. (eds) Penetrating Bars through Masks of Cosmic Dust. Astrophysics and Space Science Library, vol 319. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2862-5_2

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  • DOI: https://doi.org/10.1007/978-1-4020-2862-5_2

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-015-7085-5

  • Online ISBN: 978-1-4020-2862-5

  • eBook Packages: Springer Book Archive

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