The Nuclear Stellar Dynamics of the S0 Galaxy NGC7332

Details The Nuclear Stellar Dynamics of the S0 Galaxy NGC7332 The Nuclear Stellar Dynamics of the S0 Galaxy NGC7332

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19511804n&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #118.04; Bulletin of the American Astronomical Society, Vol. 31, p.1549

Astronomy and Astrophysics

Astronomy

Scientific paper

STIS longslit spectroscopy of the nearby S0 galaxy NGC 7332 was obtained for the purpose of modeling the nuclear stellar dynamics and to search for evidence of a massive black hole. The primary stellar absorption features are the strong Ca II triplet lines at 8600 Angstroms. Stellar kinematical measurements characterizing the line-of-sight velocity distribution were extracted using the Fourier correlation quotient method (Bender 1990, A&Ap, 229, 441). Combined with ground-based imaging and spectroscopy (Fisher, Illingworth & Franx 1994, AJ, 107, 160) and HST WF/PC-1 imaging (Lauer et al. 1995, AJ, 110, 2622) these data were fitted with dynamical models developed by K. Gebhardt which included a compact massive dark object (MDO). We will discuss our results in the context of the relationship for spheroidal stellar systems between spheroid mass and the mass of the MDO, M, (see e.g. Kormendy & Richstone 1995, ARA&A, 33, 581). NGC 7332 is of particular interest since Magorrian et al. (1998, AJ, 115, 2285) find that of all the galaxies in their survey this one is most consistent with M=0 with an upper limit M<7*E6 Msun.

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