Showing papers by "A. Gil de Paz published in 1998"
TL;DR: In this article, the authors studied the velocity field of the Blue Compact Dwarf galaxy Mrk86 using an Hα Fabry-Perot image and 14 long-slit optical spectra.
Abstract: We have studied the velocity field of the Blue Compact Dwarf galaxy Mrk86 using an Hα Fabry-Perot image and 14 long-slit optical spectra. From the ionized gas velocities measured we have found that Mrk86 follows a solid-body rotation law with a central angular velocity of 34 ± 5 km s-1 kpc-1. The comparison of the modeled rotation curve with our velocity data indicates a clear dominance of the stellar mass component over the dark matter. Related with the galaxy most intense star forming knot, a very strong gradient steeping is observed. Finally, we give kinematic evidence for the Mrk86-C expanding bubble.
1 citations
TL;DR: In this paper, the authors obtained near-infrared (JK) imaging for 67 star-forming galaxies from the Universidad Complutense de Madrid survey and derived the mass of newly formed stars, which is typically a 1 per cent of the galaxy stellar mass.
Abstract: We have obtained near-infrared (JK) imaging for 67 star-forming galaxies from the Universidad Complutense de Madrid survey. Aperture photometry at one and three disk-scale lengths have been performed on the J, K and r-band images. By comparing the r - J, J - K colors and equivalent widths of Hα with evolutionary synthesis models we derive the mass of newly formed stars, which is typically a 1 per cent of the galaxy stellar mass. The galaxy stellar masses obtained range between 3×109 and 3×1011 M⊙. The distribution of burst strengths and specific star formation rates indicate a low level of star formation activity.
1 citations