- [*] A SAURON study of M32: measuring the intrinsic flattening and
the central black hole mass
- Verolme E.K., Cappellari M., Copin Y., van der Marel R.P.,
Bacon R., Bureau M., Davies R.L., Miller B.M., de Zeeuw P.T.
- MNRAS, 335, 517-525, 2002
this paper in the ADS
We present dynamical models of the nearby compact elliptical galaxy
M32, using high quality kinematical measurements, obtained with the
integral-field spectrograph SAURON mounted on the William Herschel
Telescope on La Palma. We also include STIS data obtained by Joseph et
al. We find a best-fit black hole mass of M_BH = (2.5 +/- 0.5) x 10^6
M_sun and a stellar I-band mass-to-light ratio of (1.85 +/- 0.15)
M_sun/L_sun. For the first time, we are also able to constrain the
inclination along which M32 is observed to 70 +/- 5 degrees. Combined
with an averaged observed flattening of 0.73, this corresponds to an
intrinsic flattening of approximately 0.68 +/- 0.03.
These tight constraints are mainly caused by the use of integral-field
data. We show this quantitatively by comparing with models that are
constrained by multiple slits only. We show the phase-space
distribution and intrinsic velocity structure of the best-fit model
and investigate the effect of regularisation on the orbit
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