Central regions of the polar-ring galaxies NGC 2685 and IC 1689

Details Central regions of the polar-ring galaxies NGC 2685 and IC 1689 Central regions of the polar-ring galaxies NGC 2685 and IC 1689

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...330..412s&link_type=abstract

Astronomy and Astrophysics, v.330, p.412-418 (1998)

Astronomy and Astrophysics

Astrophysics

15

Galaxies: Ngc 2685, Ic 1689, Nuclei, Stellar Content, Kinematics And Dynamics

Scientific paper

Results of two-dimensional spectroscopy for central parts of polar-ring galaxies NGC 2685 and IC 1689 are presented. An orthogonality of star and gas rotations is detected. A strong break of absorption-line index Mgb between the nuclei and the inner bulges ("chemically decoupled nuclei") and perhaps an intermediate age of the stellar population in the nucleus of IC 1689 imply secondary star formation bursts in the centers of the polar-ring galaxies which are possibly related to accretion events having produced polar rings themselves. Based on observations collected with the 6m telescope of the Special Astrophysical Observatory (SAO) of the Russian Academy of Sciences (RAS) which is operated under the financial support of Science Department of Russia (registration number 01-43).

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