NDLI: Infrared spectroscopy of pa-beta and [fe ii] emission in ngc 4151

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Infrared spectroscopy of pa-beta and [fe ii] emission in ngc 4151

Content Provider	NASA Technical Reports Server (NTRS)
Author	Shupe, D. L. Soifer, B. T. Larkin, J. E. Knop, R. A. Armus, L. Matthews, K.
Copyright Year	1996
Description	We present spatially resolved 1.24-1.30 micron spectroscopy with a resolution of 240 km/s of the Seyfert 1.5 galaxy NGC 4151. Broad Pa-beta, narrow Pa-beta, and narrow [Fe II] (lambda = 1.2567 micron) emission lines are identified in the spectrum. Additionally, a spatially unresolved narrow component probably due to [S ix] (lambda = 1.25235 micron) is observed on the nucleus. The narrow Pa-beta and [Fe II] lines are observed to be extended over a scale of 5 sec. The spatial variation of the velocity centers of the Pa-beta and [Fe II] lines show remarkable similarity, and additionally show similarities to the velocity structure previously observed in ground based spectroscopy of [O III] emission in NGC 4151. This leads to the conclusion that the [Fe II] emission arises in clouds in the Seyfert narrow line region that are physically correlated with those narrow line clouds responsible for the optical emission. The [Fe II] emission line, however, is significantly wider than the Pa-beta emission line along the full spatial extent of the observed emission. This result suggests that despite the correlation between the bulk kinematics of Pa-beta and [Fe II], there is an additional process, perhaps fast shocks from a wind in the Seyfert nucleus, contributing to the [Fe II] emission.
File Size	880789
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19970027519
Archival Resource Key	ark:/13960/t1jh8gt56
Language	English
Publisher Date	1996-07-01
Access Restriction	Open
Subject Keyword	Astronomy Near Infrared Radiation Seyfert Galaxies Infrared Spectroscopy Active Galactic Nuclei Emission Spectra Spectroscopic Analysis Line Spectra Spatial Resolution Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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