Abstract
The Seyfert galaxy NGC4151 observed when the nucleus is at a minimum has two emission lines of full width at half maximum <7 and 16 Å respectively and varying in intensity by a factor of three in 10 days. These lines are too narrow to be emitted by the whole broad-line region and must arise instead from two localized regions which have a special excitation mechanism, possibly a two-sided jet.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Penston, M. V. et al. Mon. Not. R. astr. Soc. 196, 857–887 (1981).
Perola, G. C. et al. Mon. Not. R. astr. Soc. 200, 293–312 (1982).
Ulrich, M. H., et al. Mon. Not. R. astr. Soc. 206, 221–237 (1984).
Ulrich, M. H. XI Texas Symposium of Relativistic Astrophysics (ed. Evans, D. S.) 291–302 (Academy of Sciences, New York, 1984).
Bromage, G. E. et al. Mon. Not. R. astr. Soc. (in the press).
Cassatella, A. ESA Villafranca Satellite Tracking Station intern. Rep.
Hackney, R. L., Hackney, K. R. H. & Kondo, Y. Advances in Ultraviolet Astronomy, NASA Conference Publication 2238, 335–338 (1982).
Bohlin, R. C., Holm, A. V., Savage, B. D., Snijders, M. A. J. & Sparks, W. M. Astr. Astrophys. 85, 1–13 (1980).
Holm, A. V. Advances in Ultraviolet Astronomy, NASA Conference Publication 2238, 339–342 (1982).
Davidsen, A. F. & Hartig, G. F. COSPAR/IAU Symposium on X-ray Astronomy (eds Baity, W. A. & Peterson, L. E.) 377–380 (Pergamon, Oxford, 1978).
Jordan, C., Brueckner, G. E., Bartoe, J. D. F., Sandlin, G. D. & VanHoosier, M. E. Astrophys. J. 226, 687–697 (1978).
Bartoe, J. D. F., Brueckner, G. E., Sandlin, G. D., VanHoosier, M. E. & Jordan, C. Astrophys. J. Lett. 223, L51–L53 (1978).
Johansson, S. Mon. Not. R. astr. Soc. 205, 71P–75P (1983).
Burton, W. M. & Ridgeley, A. Solar Physics 14, 3–24 (1970).
Penston, M. V. et al. Mon. Not. R. astr. Soc. 202, 833–857 (1983).
Johansson, S. Fe(II) Multiplet Table. Internal Report (Department of Physics, Lund, 1981).
Kelly, R. L. & Palumbo, L. Naval Research Laboratory Report 7599 (1973).
Wu, C. C., Boggess, A. & Gull, T. R. Astrophys. J. 266, 28–40 (1983).
Ulrich, M. H. & Boisson, C. Astrophys. J. 267, 515–527 (1983).
Booler, R. V., Pedlar, A. & Davies, R. D. Mon. Not. R. astr. Soc. 199, 229–237 (1982).
Camenzind, M. & Courvoisier, T. J. L. Astrophys. J. Lett. 266, L83–L87 (1983).
Boggess, A. et al. Nature 275, 372–376 (1978).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ulrich, M., Altamore, A., Boksenberg, A. et al. Narrow and variable lines in the ultraviolet spectrum of the Seyfert galaxy NGC4151. Nature 313, 747–751 (1985). https://doi.org/10.1038/313747a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/313747a0
This article is cited by
-
Is there a precession-type movement in the nucleus of NGC 4151?
Astrophysics and Space Science (1993)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.