2002MNRAS.335..517V

Query : 2002MNRAS.335..517V

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 Mø= (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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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NGC 821 AG? 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 592 0
4 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
5 NGC 1600 rG 04 31 39.858 -05 05 09.97   8.9   10.81   ~ 409 1
6 NGC 1700 EmG 04 56 56.3160873072 -04 51 56.794713228   12   11.14   ~ 356 1
7 NGC 2324 OpC 07 04 08.5 +01 02 50   8.83 8.4     ~ 174 0
8 NGC 2974 Sy2 09 42 33.2918467632 -03 41 57.038311068   12.19   10.77   ~ 463 0
9 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 798 1
10 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1504 0
11 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 671 1
12 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
13 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 895 0
14 NGC 5845 GiG 15 06 00.7823239488 +01 38 01.704838596   13.8 11.20 12.06 9.94 ~ 403 0
15 NGC 6703 AG? 18 47 18.8166660360 +45 33 02.274865812   12.29 11.34     ~ 225 0

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