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26 April 2024 |
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A SAURON study of M32: measuring the intrinsic flattening and the central black hole mass | | E. K. Verolme
; M. Cappellari
; Y. Copin
; R.P. van der Marel
; R. Bacon
; M. Bureau
; R.L. Davies
; B.M. Miller
; P.T. de Zeeuw
; | | Date: |
7 Dec 2001 | | Journal: | Mon.Not.Roy.Astron.Soc. 335 (2002) 517 | | Subject: | astro-ph | | Abstract: | 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 (2.5 +/- 0.5) million solar masses and a stellar I-band mass-to-light ratio of (1.85 +/- 0.15) in solar units. 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 distribution. | | Source: | arXiv, astro-ph/0201086 | | Services: | Forum | Review | PDF | Favorites | |
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