MrK86: A 'Not-So-Dark' Galaxy

Details MrK86: A 'Not-So-Dark' Galaxy MrK86: A 'Not-So-Dark' Galaxy

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ap%26ss.263..151g&link_type=abstract

Astrophysics and Space Science, v. 263, Issue 1/4, p. 151-154 (1998).

Astronomy and Astrophysics

Astrophysics

Scientific paper

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.

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