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arXiv:astro-ph/0004049 (astro-ph)
[Submitted on 4 Apr 2000]

Title:Galaxy surface photometry

Authors:Bo Milvang-Jensen (Copenhagen and Nottingham), Inger Jorgensen (Gemini)
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Abstract: We describe galaxy surface photometry based on fitting ellipses to the isophotes of the galaxies. Example galaxies with different isophotal shapes are used to illustrate the process, including how the deviations from elliptical isophotes are quantified using Fourier expansions. We show how the definitions of the Fourier coefficients employed by different authors are linked. As examples of applications of surface photometry we discuss the determination of the relative disk luminosities and the inclinations for E and S0 galaxies. We also describe the color-magnitude and color-color relations. When using both near-infrared and optical photometry, the age-metallicity degeneracy may be broken. Finally we discuss the Fundamental Plane where surface photometry is combined with spectroscopy. It is shown how the FP can be used as a sensitive tool to study galaxy evolution.
Comments: 40 pages. Lectures given at the Nordic-Baltic Research Course in Applied Astrophysical Photometry, held September 1999 at the Moletai Observatory, Lithuania. Baltic Astronomy, 8, 535 (1999), in press. Note the year. The paper with Fig. 2, 14 and 15 in original (high) resolution is available at this http URL or this http URL
Subjects: Astrophysics (astro-ph)
Report number: Gemini Preprint #58
Cite as: arXiv:astro-ph/0004049
  (or arXiv:astro-ph/0004049v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0004049
Journal reference: Baltic Astron. 8 (1999) 535
Related DOI: https://doi.org/10.1515/astro-1999-0408

Submission history

From: Bo Milvang-Jensen [view email]
[v1] Tue, 4 Apr 2000 20:15:31 UTC (649 KB)
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