7 papers
Penetration at high-z of the Greenberg "yellow stuff": Eyes to the Future with NGST
David L. Block, Ivanio Puerari, Marianne Takamiya +1
Quantitative morphological dust-penetrated templates for galaxies in our Local Universe may also serve as excellent templates for galaxies at high-z, because of partial/total decou…
A Fabry-Perot Study of the Scd I galaxy NGC 5457
Ivanio Puerari, Margarita Valdez-Gutierrez, Margarita Rosado
We have analyzed Halpha Fabry-Perot interferograms of NGC 5457 (M101) in order to calculate the rotation curve. We have also isolated a sample of 263 HII regions and we determined…
The Duality of Spiral Structure, and a Quantitative Dust Penetrated Morphological Tuning Fork at Low and High Redshift
D. L. Block, I. Puerari, R. J. Buta +3
In the near-infrared, the morphology of older star-dominated disks indicates a simple classification scheme (1) H where is the dominant harmonic, (2) a pitch angle (derived…
The detection of spiral arm modulation in the mass distribution of an optically flocculent galaxy
Ivanio Puerari, David L. Block, Bruce G. Elmegreen +2
Spiral arm modulation in NGC 4062 (an optical flocculent) is detected for the first time; the Fourier spectra of NGC 4062 and NGC 5248 (a classic grand design in optical images) ar…
The detection of spiral arm modulation in the stellar disk of an optically flocculent and an optically grand design galaxy
Ivanio Puerari, David L. Block, Bruce G. Elmegreen +2
Two dimensional Fourier spectra of near-infrared images of galaxies provide a powerful diagnostic tool for the detection of spiral arm modulation in stellar disks. Spiral arm modul…
Toward a dust penetrated classification of the evolved stellar Population II disks of galaxies
David L. Block, Ivanio Puerari
(abridged): To derive a coherent physical framework for the excitation of spiral structure in galaxies, one must consider the co-existence of two different dynamical components: a…