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Title: LENTICULAR GALAXIES AT THE OUTSKIRTS OF THE LEO II GROUP: NGC 3599 AND NGC 3626

We have studied unbarred S0 galaxies, NGC 3599 and NGC 3626, the members of the X-ray bright group Leo II, by means of three-dimensional spectroscopy, long-slit spectroscopy, and imaging, with the aim of identifying the epoch and mechanisms of their transformation from spirals. Both galaxies have appeared to bear complex features obviously resulting from minor merging: decoupled gas kinematics, nuclear star-forming rings, and multi-tiered oval large-scale stellar disks. The weak emission line nucleus of NGC 3599 bears all signs of Seyfert activity, according to the line-ratio diagnostics of the gas excitation mechanism. We conclude that the transformation of these lenticular galaxies took place about 1-2 Gyr ago, through gravitational mechanisms unrelated to the hot intragroup medium of Leo II.
Authors:
;  [1] ;  [2]
  1. Sternberg Astronomical Institute, Moscow 119992 (Russian Federation)
  2. Special Astrophysical Observatory, Nizhnij Arkhyz, Karachai-Circassia 369167 (Russian Federation)
Publication Date:
OSTI Identifier:
21443180
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (New York, N.Y. Online); Journal Volume: 140; Journal Issue: 5; Other Information: DOI: 10.1088/0004-6256/140/5/1462
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; EMISSION; GALACTIC EVOLUTION; GALAXIES; SPECTROSCOPY; STARS; THREE-DIMENSIONAL CALCULATIONS; X RADIATION ELECTROMAGNETIC RADIATION; EVOLUTION; IONIZING RADIATIONS; RADIATIONS