Fourier Analysis of a Spiral Galaxies Sample: Determination of Kinematic and Morphological Parameters

Details Fourier Analysis of a Spiral Galaxies Sample: Determination of Kinematic and Morphological Parameters Fourier Analysis of a Spiral Galaxies Sample: Determination of Kinematic and Morphological Parameters

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..17..201v&link_type=abstract

Galaxy Evolution: Theory & Observations (Eds. Vladimir Avila-Reese, Claudio Firmani, Carlos S. Frenk & Christine Allen) Revista

Mathematics

Logic

Galaxies: Kinematics And Dynamics, Galaxies: Spiral, Galaxies: Structure, Methods: Numerical

Scientific paper

We present partial results of a larger work searching for corotations in a large sample of grand design spiral galaxies. We have searched for corotation resonances (CRs) in five northern spiral galaxies: NGC 266, NGC 1520, NGC 1530, NGC 2543, and NGC 7479. We can reject some detected CRs values in those galaxies when we perceive dust lanes in bars, we can asociate the (CR) with local features or simply there is a low signal-noise in these regions. We have detected two CRs in NGC 2543 and NGC 7479. Using the 2D Fourier technique we have determined the main spectrum components for the spiral pattern and the pitch angles of the spiral arms for 19 galaxies of our sample. In all the galaxies the m=2 mode is the most important one. However, we have detected the presence of strong m=3 modes in five galaxies of our sample (NGC 151, NGC 1241, NGC 4254, NGC 5427, and NGC 7753). We did not find correlation between the main pitch angle of the galaxies and the morphological type.

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