NGC 4621 - a micro counter-rotating core

Details NGC 4621 - a micro counter-rotating core NGC 4621 - a micro counter-rotating core

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001sf2a.conf..327w&link_type=abstract

Abstracts from SF2A-2001: Semaine de l'Astrophysique Francaise, meeting held in Lyon, France, May 28-June 1st, 2001, Eds.: F. Co

Astronomy and Astrophysics

Astrophysics

Scientific paper

We obtained OASIS/PUEO 2D spectrography and retrieved archival HST/WFPC2 and STIS data of the elliptical galaxy NGC 4621. We discovered a counter-rotating stellar core with an unusually small radius (<50pc). Surprisingly, this core is also significantly offset from both the major and minor axes of the galaxy. These results will be presented in detail, in parallel with new dynamical models. We will finally discuss possible origins for such a structure in the context of recent numerical simulations involving galaxy mergers.

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