Bibcode
Aguerri, J. A. L.; Debattista, Victor P.; Corsini, Enrico Maria
Referencia bibliográfica
Monthly Notice of the Royal Astronomical Society, Volume 338, Issue 2, pp. 465-480.
Fecha de publicación:
1
2003
Número de citas
125
Número de citas referidas
114
Descripción
We present surface photometry and stellar kinematics of a sample of five
SB0 galaxies: ESO 139-G009, IC 874, NGC 1308, NGC 1440 and NGC 3412. We
measured their bar pattern speed using the Tremaine-Weinberg method, and
derived the ratio, , of the corotation radius to the length of the bar
semimajor axis. For all the galaxies, is consistent with being in the
range from 1.0 to 1.4, i.e. that they host fast bars. This represents
the largest sample of galaxies for which has been measured in this way.
Taking into account the measured distribution of and our measurement
uncertainties, we argue that this is probably the true distribution of .
If this is the case, then the Tremaine-Weinberg method finds a
distribution of which is in agreement with that obtained by
hydrodynamical simulations. We compare this result with recent
high-resolution N-body simulations of bars in cosmologically motivated
dark matter haloes, and we conclude that these bars are not located
inside centrally concentrated dark matter haloes.