Bibcode
Fathi, K.; Peletier, R. F.; Falcón-Barroso, J.; Emsellem, E.
Referencia bibliográfica
American Astronomical Society Meeting 203, #32.03; Bulletin of the American Astronomical Society, Vol. 35, p.1255
Fecha de publicación:
12
2003
Número de citas
0
Número de citas referidas
0
Descripción
We present some results from a new 2D spectrograph, SAURON (Bacon et al.
2001; de Zeeuw et al. 2002). Each SAURON, exposure provides stellar as
well as gaseous kinematics and absorption line strength in the
wavelength range (4800-5200 Å), covering an area of (33"x41"). We
have observed a sample of 24 early-type spiral galaxies, and have
obtained maps of the kinematics of stars and gas, as well as stellar
absorption lines fo the central 2kpc of this sample.
In order to study non-circular motions, we expand the observed velocity
maps into Harmonic components, and investigate effects of the higher
order perturbations on the potential. This is an efficient way to
describe the data and this type of analysis is very sensitive the
effects of non-axisymmetric perturbations, such as bars, on the
gravitational potential, and allows us to get a better understanding of
the mass distribution (Fathi et al. 2003 in progress). We also show
SAURON studies of some other objects, namely NGC1068 (Emsellem et al.
2003 in preparation) and NGC7332 (Falcón-Barroso et al. 2003
submitted), revealing new insight into the intriguing kinematics and
dynamics, such as kinematically decoupled cores, inner disks, AGN
properties, and streaming along bars.