Neutral hydrogen absorption in NGC 1068 and NGC 3079

Abstract

view Abstract Citations (49) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Neutral Hydrogen Absorption in NGC 1068 and NGC 3079 Gallimore, J. F. ; Baum, S. A. ; O'Dea, C. P. ; Brinks, E. ; Pedlar, A. Abstract We have used the VLA in A configuration to obtain spatially resolved 21 cm absorption spectra of NGC 1068 and NGC 3079. The bulk of the absorbing H I in NGC 1068 appears to be located in the inner disk and is oriented such that the brighter, northeast radio lobe is located in front of the disk and the fainter, southwest radio lobe is located behind. We find evidence for a shock front inside the leading edge of the stellar bar based on the kinematics and column density distribution of the H I. Near the radio nucleus of NGC 1068 the H I appears to be participating in a wind-driven outflow. In NGC 3079 we detect slightly resolved H I absorption against the radio core. This absorption is characterized by strong, multiple components: (1) broad absorption (FWZI ~> 895 km s^-1^) with a deep core near the systemic velocity and a slight blue asymmetry, and (2) red- and blueshifted components which are slightly resolved by the VLA beam. These Doppler-shifted components might arise in a wind- driven outflow or a slightly resolved circumnuclear ring (~90 pc radius). Assuming circular orbits, the virial mass interior to the alleged ring would exceed 10^8^ M_sun_. Publication: The Astrophysical Journal Pub Date: February 1994 DOI: 10.1086/187200 Bibcode: 1994ApJ...422L..13G Keywords: Galactic Radiation; Galaxies; Hydrogen; Seyfert Galaxies; Stellar Evolution; Stellar Motions; Absorption Spectra; Galactic Radio Waves; Moment Distribution; Very Large Array (Vla); Astrophysics; GALAXIES: INDIVIDUAL NGC NUMBER: NGC 1068; GALAXIES: INDIVIDUAL NGC NUMBER: NGC 3079; GALAXIES: ISM; GALAXIES: KINEMATICS AND DYNAMICS; GALAXIES: SEYFERT; RADIO LINES: GALAXIES full text sources ADS | data products SIMBAD (3) NED (2)