Balmer and He I absorption in the nuclear spectrum of NGC 4151

J. B. Hutchings; D. M. Crenshaw; S. B. Kraemer; J. R. Gabel; M. E. Kaiser; D. Weistrop; T. R. Gull

doi:10.1086/344080

Balmer and He I absorption in the nuclear spectrum of NGC 4151

J. B. Hutchings, D. M. Crenshaw, S. B. Kraemer, J. R. Gabel, M. E. Kaiser, D. Weistrop, T. R. Gull

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Spectra taken with the Space Telescope Imaging Spectrograph allow accurate location and extraction of the nuclear spectrum of NGC 4151, with minimal contamination by extended line emission and circum-nuclear starlight. Spectra since 1997 show that the P Cygni Balmer and He I absorption seen previously in low nuclear states is present in higher states, with outflow velocity that changes with the nuclear flux. The phenomenon is discussed in terms of some of the absorbers seen in the UV resonance lines, and in terms of outflows from the central source and surrounding torus.

Original language	English (US)
Pages (from-to)	2543-2547
Number of pages	5
Journal	Astronomical Journal
Volume	124
Issue number	5 1763
DOIs	https://doi.org/10.1086/344080
State	Published - Nov 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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title = "Balmer and He I absorption in the nuclear spectrum of NGC 4151",

abstract = "Spectra taken with the Space Telescope Imaging Spectrograph allow accurate location and extraction of the nuclear spectrum of NGC 4151, with minimal contamination by extended line emission and circum-nuclear starlight. Spectra since 1997 show that the P Cygni Balmer and He I absorption seen previously in low nuclear states is present in higher states, with outflow velocity that changes with the nuclear flux. The phenomenon is discussed in terms of some of the absorbers seen in the UV resonance lines, and in terms of outflows from the central source and surrounding torus.",

author = "Hutchings, {J. B.} and Crenshaw, {D. M.} and Kraemer, {S. B.} and Gabel, {J. R.} and Kaiser, {M. E.} and D. Weistrop and Gull, {T. R.}",

year = "2002",

month = nov,

doi = "10.1086/344080",

language = "English (US)",

volume = "124",

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T1 - Balmer and He I absorption in the nuclear spectrum of NGC 4151

AU - Hutchings, J. B.

AU - Crenshaw, D. M.

AU - Kraemer, S. B.

AU - Gabel, J. R.

AU - Kaiser, M. E.

AU - Weistrop, D.

AU - Gull, T. R.

PY - 2002/11

Y1 - 2002/11

N2 - Spectra taken with the Space Telescope Imaging Spectrograph allow accurate location and extraction of the nuclear spectrum of NGC 4151, with minimal contamination by extended line emission and circum-nuclear starlight. Spectra since 1997 show that the P Cygni Balmer and He I absorption seen previously in low nuclear states is present in higher states, with outflow velocity that changes with the nuclear flux. The phenomenon is discussed in terms of some of the absorbers seen in the UV resonance lines, and in terms of outflows from the central source and surrounding torus.

AB - Spectra taken with the Space Telescope Imaging Spectrograph allow accurate location and extraction of the nuclear spectrum of NGC 4151, with minimal contamination by extended line emission and circum-nuclear starlight. Spectra since 1997 show that the P Cygni Balmer and He I absorption seen previously in low nuclear states is present in higher states, with outflow velocity that changes with the nuclear flux. The phenomenon is discussed in terms of some of the absorbers seen in the UV resonance lines, and in terms of outflows from the central source and surrounding torus.

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JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

IS - 5 1763

ER -

Balmer and He I absorption in the nuclear spectrum of NGC 4151

Abstract

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