SIMBAD references

2002MNRAS.335..517V - Mon. Not. R. Astron. Soc., 335, 517-525 (2002/September-3)

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. and DE ZEEUW P.T.

Abstract (from CDS):

We present dynamical models of the nearby compact elliptical galaxy M32, using high-quality kinematic measurements, obtained with the integral-field spectrograph SAURON mounted on the William Herschel Telescope on La Palma. We also include STIS data obtained previously by Joseph et al. We find a best-fitting black hole mass of M_ø= (2.5±0.5)x10 ⁶ M_☉and a stellar I -band mass-to-light ratio of (1.85±0.15) M_☉/L_☉ . For the first time, we are also able to constrain the inclination along which M32 is observed to 70°± 5°. Assuming that M32 is indeed axisymmetric, the averaged observed flattening of 0.73 then corresponds to an intrinsic flattening of 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-fitting model and investigate the effect of regularization on the orbit distribution.

Abstract Copyright: RAS

Journal keyword(s): methods: data analysis - techniques: spectroscopic - galaxies: elliptical and lenticular, cD - galaxies: individual: M32 - galaxies: kinematics and dynamics - galaxies: structure.

Simbad objects: 15

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