A massive object in the core of NGC 5055?

Details A massive object in the core of NGC 5055? A massive object in the core of NGC 5055?

1998-12-21

arxiv.org/abs/astro-ph/9812396v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, proceedings of the fifth CFHT users' meetings, quebec city, may 1998

Scientific paper

In a global kinematical study of NGC 5055 using high resolution Fabry-Perot, intriguing spectral line profiles have been observed in the center of the galaxy. These profiles seem to indicate a rapidly rotating disk with a radius near 365 pc and tilted 50 $\deg$ with respect to the major axis of the galaxy. In the hypothesis of a massive dark object, a naive keplerian estimate gives a mass around $10^7.2$ to $10^7.5 M_\odot$. The limited spectral domain of the Fabry-Perot leaves some ambiguity on the exact movement and velocity of this H$\alpha$ emission. 2-D spectroscopy with a larger spectral range (eg.: TIGRE, OASIS) is thus required.

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