Velocity field in the galaxy Mark 8 with vigorous starburst centres |
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| Authors: | E Ye Khachikian T A Movsessian |
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| Institution: | (1) V. A. Ambartsumyan Byurakan Astrophysical Observatory, Byurakan, Armenia |
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| Abstract: | The velocity field in the galaxy Mark 8 is studied by means of observations with the 2.6-m telescope at the Byurakan Astrophysical
Observatory using the VAGR spectrograph. In the optical range, the central portion of this galaxy consists of five bright
condensations which are superassociations (SA). These studies were made in a wavelength range that encompasses images of the
galaxy in the Hα and NII] λλ6548 and 6583Å emission lines. The radial velocity field was obtained. The velocities of all
the superassociations were measured and a rotation curve constructed for the galaxy. The relative intensities of the emission
lines have been determined. Images are constructed in the Hα and NII] lines and in the red continuum. It is concluded that
the superassociations were formed together and are, as a whole, young. The shape of the rotation curve shows that Mark 8 is
an isolated galaxy with a composite multicomponent nucleus.
Translated from Astrofizika, Vol. 51, No. 4, pp. 543–553 (November 2008). |
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| Keywords: | galaxies active velocity field — individual Mark 8 |
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