Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.197...77g&link_type=abstract
ASTROPHYSICS AND SPACE SCI. V.197, NO. 1/NOV(I), P. 77, 1992
Astronomy and Astrophysics
Astrophysics
3
Scientific paper
A great number of spectra of the Seyfert galaxy nucleus NGC 4151 were obtained in the Crimean Astrophysical Observatory in 1988-1990 using the CCD. Significant variation in continuum intensity and broad Hcx line profile were noted. Differences between individual spectra and the spectrum taken as a standard were calculated to study this variability. It was noted that different parts of the profile are varying in different ways. Smaller changes are located at far-away regions of the wings and at the low positive velocities of the profile. Lower variations in the red part of Hcx profile near the center of the line are interpreted by the delay effect in an expanded shell. Since the evidences for accretion in a BLR are existing (including NGC 4151) then either the BLR is a complex system where both inflow and low velocities outflow are observed or the outflow must be referred to the inner NLR. Cross correlation analysis shows shorter delay for the higher velocities of the Hc~ profile and does not contradict to the outflow at low velocities (near the line center), but its confidence level is small. Lower response to the continuum changes at far away parts of the broad Hcx wings evidences that the gas in the vicinity of the central engine is optically thin for the ionizing radiation
No associations
LandOfFree
Variations of the Broadline Hα Profile in NGC4151 as Evidence for the Complex Kinematics of Gas in the Nucleus does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Variations of the Broadline Hα Profile in NGC4151 as Evidence for the Complex Kinematics of Gas in the Nucleus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variations of the Broadline Hα Profile in NGC4151 as Evidence for the Complex Kinematics of Gas in the Nucleus will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1551580