Astron. Astrophys. Suppl. Ser. 145, 377-397
A. Gil de Paz1 - J. Zamorano1 - J. Gallego1 - F. de B. Domínguez2
Send offprint request: A. Gil de Paz
1 - Departamento de Astrofísica, Universidad Complutense de Madrid, Avda. Complutense s/n, E-28040 Madrid, Spain
2 - OTRI, Universidad Carlos III de Madrid, C/ Butarque, 15, E-28911 Leganés, Spain
e-mail: email@example.com (AGdP)
Received November 23, 1999; accepted June 8, 2000
We have obtained optical (BVR, [O III]5007 Å and H), near infrared (JHK) imaging and long-slit optical spectroscopy for the Blue Compact Dwarf galaxy Mrk 86 (NGC 2537). In this paper, the first of two, we present optical-near-infrared colors and emission-line fluxes for the currently star-forming regions, intermediate aged starburst and underlying stellar population. We also describe the evolutionary synthesis models used in Paper II.
The R and H luminosity distributions of the galaxy star-forming regions show maxima at MR=-9.5m and . The underlying stellar population shows an exponential surface brigthness profile with central value, , and scale, kpc, both measured in the R-band image. In the galaxy outer regions, dominated by this component, no significant color gradients are observed.
Finally, a complete set of evolutionary synthesis models have been developed, covering a wide range in metallicity, , and burst strength, 1-10-4. These models include nebular continuum and recombination and forbidden-line emission.
Key words: individual: Mrk 86 -- galaxies: irregular, star clusters, stellar content
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