منابع مشابه
Structure , Kinematics , and Dynamics of Bulges
A historical review of our understanding of bulges is first presented, highlighting similarities and differences between bulges and el-lipticals. Then, some topics of current interest are reviewed, bypassing stellar population questions and focusing on structural and dynamical issues relating bulges and disks. The topics are: i) the fundamental plane; ii) the evidence for two classes of bulges,...
متن کاملStellar populations in the bulges of S0s and the formation of S0 galaxies
The stellar populations in the bulges of S0s, together with the galaxies’ dynamics, masses and globular clusters, contain very interesting clues about their formation. I present here recent evidence suggesting that S0s are the descendants of fading spirals whose star formation ceased.
متن کاملBulges on the Fundamental Plane of Early-Type Galaxies
In an ongoing effort to study the formation and evolution of galactic bulges we have investigated the position of 19 bulges of type S0-Sbc on the fundamental plane (FP). We find that bulges, both in B and K band, lie close to but slightly below the FP defined by ellipticals and S0s, i.e. are slightly brighter. There are hints that bulges of later morphological type are situated below the other ...
متن کاملThe minor axis outflow of NGC 2146
X-ray and optical observations have shown that the supernova explosions and stellar winds of the starburst in NGC 2146 produce an outflow of hot material along the minor axis. This outflow is expected to have a more or less conical shape, on either side of the galactic plane, and cone walls of cooler material where the outflow is in shock contact with halo gas. We attempt to determine the geome...
متن کاملPseudobulges in Barred S0 Galaxies
We present preliminary results from an ongoing study of the bulges of S0 galaxies. We show that in a subsample of 14 barred S0 galaxies, fully half the photometrically defined bulges show kinematic signatures of pseudobulges – that is, their kinematics are dominated by rotation. In four of these galaxies, we identify at least two subcomponents in the photometric bulge region: flatter, disk or b...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2003
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20030470