Abstract
Narrowband imaging of the nuclear region of NGC 4151 with the Hubble Space Telescope is presented. The filter bandpasses isolate line emission in various high-velocity ranges in several ions. Slitless and long-slit spectra of the region with the Space Telescope Imaging Spectrograph also indicate the locations of high-velocity gas. These emission regions are faint and interspersed among the bright emission clouds seen in direct images. They have radial velocities up to 1400 km s-1 relative to the nucleus and are found in both approach and recession on both sides of the nucleus. This contrasts strongly with the bright emission-line clouds, which have been discussed previously as showing bidirectional outflow with velocities within 400 km s-1 of the nucleus. We discuss the possible connections of the high-velocity material with the radio jet and the nuclear radiation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
