Astron. Astrophys. Suppl. Ser.
Volume 145, Number 3, September 2000
|Page(s)||377 - 397|
|Published online||15 September 2000|
Mapping the star formation history of Mrk 86*
I. Data and models
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)
Accepted: 8 June 2000
We have obtained optical (BVR, [OIII]λ5007 Å and Hα), 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 Hα luminosity distributions of the galaxy star-forming regions show maxima at 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
© European Southern Observatory (ESO), 2000