Spectroscopy of the Rapidly Rotating Nuclear Disk in the Virgo s0 NGC4526

Details Spectroscopy of the Rapidly Rotating Nuclear Disk in the Virgo s0 NGC4526 Spectroscopy of the Rapidly Rotating Nuclear Disk in the Virgo s0 NGC4526

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6002r&link_type=abstract

HST Proposal ID #6002

Physics

Hst Proposal Id #6002 Agn

Scientific paper

Ground-based spectroscopic observations of 100 galaxies in the Virgocluster by Rubin and Kenney reveal that 25 percent of the galaxieshave rapidly rotating distinct nuclear gas disks. These galaxies spanHubble types E to Sc, and are located throughout the cluster. Sevenof them have been imaged by WFPC2. Of all, NGC 4526 (S0) is the mostspectacular. A rapidly rotating nuclear disk of gas, dust, and starsextends from the nucleus to 15'', 7 percent of the galaxy radius; gasis not observed beyond. Within a few arcseconds of the nucleus, rotation velocities surpass 250 km/s and a mass greater than 10^9Msunis derived, but these values are surely degraded by the 1.5''ground-based spatial resolution. We propose to study the morphologyand dynamics of the nuclear region of NGC 4526 by using WFPC2 narrowband images, in order to isolate the H Alpha+NII region, and with FOSspectra, covering the wavelength region from H-beta through SII6731Angstrom. Because we are interested in studying phenomena takingplace on scales of a fraction of an arcsec, the high spatialresolution of HST is required.

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