Lenticular Galaxies at the Outskirts of the Leo II Group: NGC 3599 and NGC 3626

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 ap...

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Veröffentlicht in:The Astronomical journal 2010-11, Vol.140 (5), p.1462-1474
Hauptverfasser: Sil'chenko, O. K, Moiseev, A. V, Shulga, A. P
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Sprache:eng
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ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ELECTROMAGNETIC RADIATION
EMISSION
EVOLUTION
GALACTIC EVOLUTION
GALAXIES
IONIZING RADIATIONS
RADIATIONS
SPECTROSCOPY
STARS
THREE-DIMENSIONAL CALCULATIONS
X RADIATION
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container_title The Astronomical journal
container_volume 140
creator Sil'chenko, O. K
Moiseev, A. V
Shulga, A. P
description 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.
doi_str_mv 10.1088/0004-6256/140/5/1462
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subjects ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ELECTROMAGNETIC RADIATION
EMISSION
EVOLUTION
GALACTIC EVOLUTION
GALAXIES
IONIZING RADIATIONS
RADIATIONS
SPECTROSCOPY
STARS
THREE-DIMENSIONAL CALCULATIONS
X RADIATION
title Lenticular Galaxies at the Outskirts of the Leo II Group: NGC 3599 and NGC 3626
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