Summary
We perform a 2D Fourier morphological analysis of GALEX and Spitzer images of M81, an early-type spiral galaxy. We present the Fourier spectra, m-armed spiral densities and synthetic m=2 spirals, which represent very well the entire structure. The Fourier spectra from the FUV and NUV GALEX images are quite similar. In all m=2 spectra, we find spiral arm modulation. For Spitzer images the spiral structure is more tightly-bound for redder filters (5.8 and 8.0 μm). Furthermore, pitch angles for FUV, NUV, 5.8 μm and 8.0 μm are very similar. This last statement strongly suggests a common locus for the origin of UV, 5.8, and 8.0 μm infrared light, and it is an important result pointing in the direction that 5.8 and 8.0 μm light comes from dust illuminated by ultraviolet photons from the very young population.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Block, D. L., & Puerari, I. 1999, A&A, 342, 627
Considère, S., & Athanassoula, E. 1982, A&A, 111, 28
de Vaucouleurs, G., de Vaucouleurs, A., Corwin, H.G., Buta, R.J., Paturel, G., & Fouqué, P. 1991, Third Reference Catalogue of Bright Galaxies (Springer Verlag: New York)
Elmegreen, B. G., Seiden, P. E., & Elmegreen, D. M. 1989, ApJ, 343, 602
Gil de Paz, A., Boissier, S., Madore, B. F., et al. 2006, ApJS, 173, 185
Hibbard, J. E., Bianchi, L., Thilker, D. A., et al. 2005, ApJ, 619, L87
Iye, M., Okamura, S., Hamabe, M., & Watanabe, M. 1982, ApJ, 256, 103
Kalnajs, A.J. 1975, in La Dynamique des Galaxies Spirales, ed. L. Weliachew (Paris Editions du CNRS), 103
Kuchinski, L. E., Freedman, W. L., Madore, B. F., et al. 2000, ApJS, 131, 441
Kuchinski, L. E., Madore, B. F., Freedman, W. L., & Trewhella, M. 2001, AJ, 122, 729
Puerari, I. 1993, PASP, 105, 1290
Puerari, I., & Dottori, H. A. 1992, A&AS, 93, 469
Puerari, I., Block, D. L., Elmegreen, B. G., Frogel, J. A., & Eskridge, P. B. 2000, A&A, 359, 932
Willner, S. P., Ashby, M. L. N., Barmby, P., et al. 2004, ApJS, 154, 222
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2009 Springer-Verlag New York
About this paper
Cite this paper
Puerari, I., González–Lópezlira, R.A., Valdez–Gutiérrez, M. (2009). A Morphological Study of M81: Comparison Between GALEX and Spitzer Imaging. In: New Quests in Stellar Astrophysics II. Astrophysics and Space Science Proceedings. Springer, New York, NY. https://doi.org/10.1007/978-0-387-87621-4_14
Download citation
DOI: https://doi.org/10.1007/978-0-387-87621-4_14
Published:
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-87620-7
Online ISBN: 978-0-387-87621-4
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)