MODELING THE OUTFLOW IN THE NARROW-LINE REGION OF MARKARIAN 573: BICONICAL ILLUMINATION OF A GASEOUS DISK
- Department of Physics and Astronomy, Georgia State University, Astronomy Offices, One Park Place South SE, Suite 700, Atlanta, GA 30303 (United States)
- Institute for Astrophysics and Computational Sciences, Department of Physics, The Catholic University of America, Washington, DC 20064 (United States)
- Computational Physics, Inc., Springfield, VA 22151-2110 (United States)
We present a study of the outflowing ionized gas in the resolved narrow-line region of the Seyfert 2 galaxy Mrk 573, and its interaction with an inner dust/gas disk, based on Hubble Space Telescope (HST) Wide Field Planetary Camera 2 and Space Telescope Imaging Spectrograph observations. From the spectroscopic and imaging information, we determined the fundamental geometry of the outflow and inner disk, via two modeling programs used to recreate the morphology of these regions imaged with HST. We also determined that the bicone of ionizing radiation from the active galactic nucleus intersects with the inner disk, illuminating a section of the disk including inner segments of spiral arms, fully seen through structure mapping, which appear to be outflowing and expanding. In addition, we see high velocities at projected distances of {>=}2'' ({approx}700 pc) from the nucleus, which could be due to rotation or in situ acceleration of gas off the spiral arms. We find that the true half-opening angle of the ionizing bicone (53{sup 0}) is much larger than the apparent half-opening angle (34{sup 0}) due to the above geometry, which may apply to a number of other Seyferts as well.
- OSTI ID:
- 21443263
- Journal Information:
- Astronomical Journal (New York, N.Y. Online), Vol. 140, Issue 2; Other Information: DOI: 10.1088/0004-6256/140/2/577; ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
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