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 |
|---|---|
| Pages (from-to) | 2543-2547 |
| Number of pages | 5 |
| Journal | Astronomical Journal |
| Volume | 124 |
| Issue number | 5 1763 |
| DOIs | |
| State | Published - Nov 2002 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Space and Planetary Science
- Astronomy and Astrophysics
Cite this
Balmer and He I absorption in the nuclear spectrum of NGC 4151. / Hutchings, J. B.; Crenshaw, D. M.; Kraemer, S. B.; Gabel, Jack; Kaiser, M. E.; Weistrop, D.; Gull, T. R.
In: Astronomical Journal, Vol. 124, No. 5 1763, 11.2002, p. 2543-2547.Research output: Contribution to journal › Article
}
TY - JOUR
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, Jack
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.
UR - http://www.scopus.com/inward/record.url?scp=0141640788&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0141640788&partnerID=8YFLogxK
U2 - 10.1086/344080
DO - 10.1086/344080
M3 - Article
AN - SCOPUS:0141640788
VL - 124
SP - 2543
EP - 2547
JO - Astronomical Journal
JF - Astronomical Journal
SN - 0004-6256
IS - 5 1763
ER -