Galactic Astronomy ??????? I Lecture 1-4: Dynamical structures of galaxies Seminar: Cappellari et al. 2006, MNRAS, 366, 1126

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Galactic Astronomy??????? ILecture 1-4
Dynamical structures of galaxies Seminar
Cappellari et al. 2006, MNRAS, 366,
1126 Lecture
2011/10/24
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Dynamical structure of Elliptical Galaxies
Faber-Jackson relation, Fundamental Plane The
relation between luminosity and velocity
dispersion of Elliptical galaxy is called
Faber-Jackson relation. There is a significant
scatter in the relation, and if size is also
included as the 3rd parameter, the scatter is
smaller (Fundamental plane).
Kormendy Djorgovski 1989, ARAA, 27, 235
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• Dynamical structure of elliptical galaxies
• Collision-less Boltzmann equation (???????????)
• Velocity moment Jeans equation
• Spatial moment Virial theorem
• Fundamental plane of elliptical galaxies is
  basically consistent with the Virial theorem

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Dynamical structure of Elliptical galaxies
rotation and dispersion Luminous elliptical
galaxies (white circles) have larger ellipticity
than that can be explained with the effect of
rotation. The ellipticity is thought to be due to
the non-isotropic velocity dispersion of luminous
elliptical galaxies. On the contrary, fainter
elliptical galaxies (black circles) have the
ratio between rotation and velocity dispersion as
large as that is necessary to explain the
observed ellipticity.
Davies et al. 1983, ApJ, 266, 41
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Dynamical structure of elliptical
galaxies Relations between V/sigma and other
observables.
Kormendy Djorgovski 1989, ARAA, 27, 235
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Detailed dynamical structure SAURON
survey Mapping central regions of galaxies with
integral field spectroscopy (3-dimensional
spectroscopy). In SAURON survey, the integral
field spectrograph using microlens array is
attached to the 4.2m William Herschel Telescope
and observed 48 elliptical and S0 galaxies in the
nearby universe.
Bacon et al. 2001, MNRAS, 326, 23
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48 E and S0s Emsellem et al. 2004, MNRAS, 352,
721c
SAURON datasets
Gaussian-Hermite profile Riffel 2010
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SAURON datasets Kinematical classification,
decoupled-core
Lambda ltR Vgt / ltR sqrt( V2 R2 )gt ltgt
Lumoinosity weighted sky average
Emsellem et al. 2007, MNRAS, 379, 401
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Dynamical structure of Elliptical galaxies
rotation and dispersion Recent update with SAURON
results. The observed quantities are shown with
numbers (NGC name). The diamonds represents the
value after the correction of inclination.
Isotropic velocity dispersion models (green) and
models with including effects of non-isotropic
velocity dispertion (blue). Even for
fast-rotating Ellipticals, effects of
non-isotropic velocity dispersion is necessary.
Cappellari et al. 2007, MNRAS, 379, 418
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Dynamical structure of spiral galaxies
Tully-Fisher Relation The relation between
luminosity and circular velocity measured with
the HI 21cm line. The relation becomes tighter if
the luminosity is measure in longer wavelength.
Pierce Tully 1992, ApJ, 387, 47
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Dynamical structure of spiral galaxies
Tully-Fisher Relation Examined the relations
between velocity luminosity size with larger
sample of spiral galaxies. The relation is tight
bewteen velocity and luminosity Tully-Fisher
relation.
Courteau et al. 2007, ApJ, 671, 203
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Dynamical structure of spiral galaxies
Tully-Fisher Relation Baryonic (Stars Gas)
Tully-Fisher relation
McGaugh et al. 2000, ApJ, 533, L99