Ionized gas and radio emission in the barred Seyfert galaxy NGC 5728

Details Ionized gas and radio emission in the barred Seyfert galaxy NGC 5728 Ionized gas and radio emission in the barred Seyfert galaxy NGC 5728

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..154s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 154-171.

Astronomy and Astrophysics

Astronomy

67

Astronomical Photometry, Barred Galaxies, Emission Spectra, Ionized Gases, Radio Spectra, Seyfert Galaxies, Fabry-Perot Spectrometers, H Alpha Line, Radial Velocity, Radio Sources (Astronomy), Star Distribution, Ubv Spectra

Scientific paper

This paper reports extensive new optical and radio observations of NGC 5728, with emphasis on the central regions. Deep photographs revealing detail in the faint spiral arms are discussed. Broad-band UBV CCD images obtained to examine the colors of the stellar populations that comprise the bar and central ring are presented. To study the distribution and kinematics of the ionized gas, imaging spectroscopic measurements in the Hα emission line were made. Conventional long-slit spectra covering the ionized gas in the nuclear region were also obtained. Detailed maps of the radio emission in the central regions of NGC 5728 are presented. These combined data provide considerable evidence for the inflow of gas into the nuclear region, in response to the nonaxisymmetric gravitational potential of the bar. The possible relation of this phenomenon to the Seyfert nature of NGC 5728 is also considered.

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