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Title:
Axisymmetric dynamical models for SAURON and OASIS observations of NGC3377
Authors:
Copin, Y.; Cretton, N.; Emsellem, E.
Affiliation:
AA(Institut de Physique Nucléaire de Lyon, 69222 Villeurbanne, France; Sterrewacht Leiden, Postbus 9513, 2300 RA Leiden, The Netherlands), AB(European Southern Observatory, Karl-Schwarzschild Strasse 2, 85748 Garching bei München, Germany; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany), AC(CRAL-Observatoire, 9 Avenue Charles-André, 69230 Saint-Genis-Laval, France)
Publication:
Astronomy and Astrophysics, v.415, p.889-903 (2004) (A&A Homepage)
Publication Date:
03/2004
Origin:
A&A
Astronomy Keywords:
galaxies: kinematics and dynamics, galaxies: individual: NGC3377
DOI:
10.1051/0004-6361:20034076
Bibliographic Code:
2004A&A...415..889C

Abstract

We present a unique set of nested stellar kinematical maps of NGC3377 obtained with the integral-field spectrographs OASIS and SAURON . We then construct general axisymmetric dynamical models for this galaxy, based on the Schwarzschild numerical orbit superposition technique applied to these complementary measurements. We show how these two datasets constrain the mass of the central massive object and the overall mass-to-light ratio of the galaxy by probing the inner and outer regions respectively. The simultaneous use of both datasets leads us to confirm the presence of a massive black hole with a mass of M = 7-5+4 107 Msun (99.7% confidence level), with a best-fit stellar mass-to-light ratio ML[I] = 2.1 ± 0.2 (for an assumed edge-on inclination).
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