STIS Observations of the Nuclear Ionized Gas in the Elliptical Galaxy M84
نویسندگان
چکیده
We present optical long-slit spectroscopy of the nucleus of the nearby radio galaxy M84 (NGC 4374 = 3C 272.1) obtained with STIS aboard HST. Our spectra reveal that the nuclear gas disk seen in WFPC2 imaging by Bower et al. (1997, ApJ, 483, L33) is rotating rapidly. The velocity curve has an S-shape with a peak amplitude of 400 km s−1 at 0. ′′1 = 8 pc from the nucleus. To model the observed gas kinematics, Bower et al. (1997, ApJL, in press) fit a thin Keplerian disk model to these data, leading to the conclusion that a ≈ 1.5× 10 M dark compact mass (most likely a supermassive black hole) resides in the nucleus of M84.
منابع مشابه
ar X iv : a st ro - p h / 97 10 26 4 v 1 2 3 O ct 1 99 7 Kinematics of the Nuclear Ionized Gas in the Radio Galaxy M 84 ( NGC 4374
We present optical long-slit spectroscopy of the nucleus of the nearby radio galaxy M84 (NGC 4374 = 3C 272.1) obtained with the Space Telescope Imaging Spectrograph (STIS) aboard the Hubble Space Telescope (HST). Our spectra reveal that the nuclear gas disk seen in WFPC2 imaging by Bower et al. (1997, ApJ, 483, L33) is rotating rapidly. The velocity curve has an S-shape with a peak amplitude of...
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