Stars and gas in the inner parts of galaxies seen in SAURON integral field observations

• We give two examples of spiral galaxies that show non-circular gas motions in the inner kiloparsecs, from SAURON integral field spectroscopy. We use harmonic decomposition of the velocity field of the ionized gas to study the underlying mass distribution, employing linear theory. The higher order harmonic terms and the main kinematic features of the observed data are consistent with an analytically constructed simple bar model. We also present maps of a number of strong absorption lines in M 100, derive simple stellar populations and correlate them with features in the gas kinematics.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Nyckelord

Galaxies: bulges

Galaxies: evolution

Galaxies: formation

Galaxies: kinematics and dynamics

Galaxies: spiral

Galaxies: structure

Galaxies: nuclei

Galaxies: individual (NGC 5448

M 100)

Extragalactical astronomy

Extragalaktisk astronomi

Publikations- och innehållstyp

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