Kinematic modeling of disk galaxies
نویسندگان
چکیده
منابع مشابه
Kinematic modeling of disk galaxies III . The warped “ Spindle ” NGC 2685
This is the third of a series of papers in which the structure and kinematics of disk galaxies is studied. Employing direct tilted-ring fits to the data cube as introduced in Paper I, we perform an analysis of the " Spindle " galaxy NGC 2685, previously regarded as two-ringed polar ring galaxy. Deep H i and optical (i ′-band) observations are presented. The H i observations strongly suggest tha...
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We present a comprehensive mass modeling technique for disk galaxies with resolved rotation curves. Our models allow for a stellar disk of variable thickness and mass-to-light ratio, a gaseous disk, halo profiles with a range of inner density profile slopes (−α), oblate halos, adiabatic contraction of the halo, and fixed minimum rotation curve error values. We test our technique with data from ...
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The central regions of disk galaxies are hosts to supermassive black holes whose masses show a tight correlation with the properties of surrounding stellar bulges. While the exact origin of this dependency is not clear, it can be related to the very basic properties of dark matter halos and the associated gas and stellar dynamics in the central kpc of host galaxies. In this review we discuss so...
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This paper addresses available constraints on mass models fitted to rotation curves. Mass models of disk galaxies have well-known degeneracies, that prevent a unique mass decomposition. The most notable is due to the unknown value of the stellar mass-to-light ratio (the disk-halo degeneracy); even with this known, degeneracies between the halo parameters themselves may prevent an unambiguous de...
متن کاملKinematic modelling of disk galaxies I. A new method to fit tilted rings to data cubes
This is the first of a series of papers in which the kinematics of disk galaxies over a range of scales is scrutinised by employing spectroscopy. A fundamental aspect of these studies is presented here: the new publicly available software tool TiRiFiC (http://www.astro.uni-bonn.de/ ̃gjozsa/tirific.html) enables a direct fit of a “tilted-ring model” to spectroscopic data cubes. The algorithm gene...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2008
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:200809372