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Date and Time of the Query: 2019-05-26 T13:01:00 PDT
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For refcode 1998PASJ...50..427S:
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Copyright by Astronomical Society of Japan. 1998PASJ...50..427S Nuclear-to-Disk Rotation Curves of Galaxies in the H{alpha} and [NII] Emission Lines Yoshiaki SOFUE, Akihiko TOMITA, Yoshinori TUTUI, Mareki HONMA, and Yoichi TAKEDA Institute of Astronomy, The University of Tokyo, Mitakq, Tokyo 181-8588 Faculty of Education, Wakayama University, Wakayama 640-8510 (Received 1988 May 7; accepted 1988 August 23) Abstract We have obtained optical CCD spectroscopy along the major axes of 22 nearby spiral galaxies of Sb and Sc types in order to analyze their rotation curves. By subtracting the stellar continuum emission, we have obtained position-velocity (FV) diagrams of the H{alpha} and [NII] lines. We point out that the H{alpha} line is often superposed by a broad stellar absorption feature (Balmer wing) in the nuclear regions, and, therefore, the [N II] line is a better tracer of kinematics in the central few hundred parsec regions. By applying the envelop-tracing technique to the H{alpha} and [N II] PV diagrams, we have derived nucleus-to-disk rotation curves of the observed galaxies. The rotation curves rise steeply within the central few hundred parsecs, indicating a rapidly rotating nuclear disk and mass concentration near the nucleus. Key words: Galaxies: general - Galaxies: kinematics - Galaxies: nuclei - Galaxies: rotation
Retrieve 22 NED objects in this reference.
Please click here for ADS abstract

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