Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Wills, B. J."'
Publikováno v:
Astron.J.127:156,2004
We present the optical spectra and simple statistical analysis for a complete sample of 110 soft X-ray selected AGN. About half of the sources are Narrow-Line Seyfert 1 galaxies (NLS1s), which have the steepest X-ray spectra, strongest FeII emission
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310027
Autor:
Shields, G. A., Gebhardt, K., Salviander, S., Wills, B. J., Xie, B., Brotherton, M. S., Yuan, J., Dietrich, M.
Publikováno v:
Astrophys.J.583:124-133,2003
We use QSO emission-line widths to examine the black hole mass - sigma relationship as a function of redshift and to extend the relationship to larger masses. Supermassive black holes in galactic nuclei are closely related to the bulge of the host ga
Externí odkaz:
http://arxiv.org/abs/astro-ph/0210050
Autor:
Hines, D. C., Schmidt, G. D., Gordon, K. D., Smith, P. S., Wills, B. J., Allen, R. G., Sitko, M. L.
We present UV and optical spectropolarimetry of two highly polarized IRAS-selected QSOs, IRAS 13349+2438 and the BALQSO IRAS 14026+4341. The polarization in both objects rises rapidly toward the blue, peaks near 3000 A in the rest frame and remains n
Externí odkaz:
http://arxiv.org/abs/astro-ph/0109189
Publikováno v:
New Astron.Rev. 44 (2000) 511-517
The width of the broad H-beta emission line is the primary defining characteristic of the NLS1 class. This parameter is also an important component of Boroson and Green's optical Eigenvector 1 (EV1), which links steeper soft X-ray spectra with narrow
Externí odkaz:
http://arxiv.org/abs/astro-ph/0005146
We have surveyed the optical linear polarization of a completely identified sample of 43 bright soft-X-ray-selected ROSAT AGN. Most (40) of these AGN show low polarization (<1%), and no clear optical reddening. This supports the suggestion from rapid
Externí odkaz:
http://arxiv.org/abs/astro-ph/9712149
Autor:
Wills, B. J.
The ectomycorrhizal association between Mountain Pine (Pinus mugo) and the fungus Suillus luteus has been studied in an attempt to promote establishment and growth of trees on high altitude revegetation sites. In vitro growth studies of S. luteus sho
Externí odkaz:
http://hdl.handle.net/10092/5731
Autor:
Wills, B. J., Cole, A. L. J.
Publikováno v:
The New Phytologist, 1978 May 01. 80(3), 579-582.
Externí odkaz:
https://www.jstor.org/stable/2431216
Publikováno v:
NASA Astrophysics Data System
Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE, 2-6 August, 2004, Victoria, British Columbia, Canada
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::96b4179d63ac67651e9c6d1f45a09d58
https://nrc-publications.canada.ca/eng/view/object/?id=4f4bf5f8-07b1-4c26-b857-95ab4ce0b88b
https://nrc-publications.canada.ca/eng/view/object/?id=4f4bf5f8-07b1-4c26-b857-95ab4ce0b88b
Publikováno v:
NASA Astrophysics Data System
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::aa86b00fe68132ae76f005711b19b299
https://nrc-publications.canada.ca/eng/view/object/?id=09109a66-d4de-4a60-9491-51f74ec8938c
https://nrc-publications.canada.ca/eng/view/object/?id=09109a66-d4de-4a60-9491-51f74ec8938c
Autor:
Peterson, B. M., Berlind, P., Bertram, R., Bochkarev, N. G., Bond, D., Brotherton, M. S., Busler, J. R., Chuvaev, K. K., Cohen, R. D., Dietrich, M., Elvis, M., Filippenko, A. V., Foltz, C. B., Garnavich, P. M., Ho, L. C., Horine, E., Horne, K., Huchra, J. P., Kollatschny, W., Korista, K. T., Malkan, M. A., Matheson, T., Mlgnoli, M., Morris, S. L., Nazarova, L., Pent-Old, J., Peters, J., Pogge, R. W., Pronik, V. I., Rush, B., Sergeev, S. G., Shapovalova, A. I., Shields, J. C., Giovanna Maria Stirpe, Tokarz, S., Wagner, R. M., Weymann, R. J., White, R. J., Wilkes, B. J., Wills, D., Wills, B. J., Winge, C., Younger, P. F.
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Scopus-Elsevier
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Scopus-Elsevier
We report on the results of a continuation of a large monitoring program of optical spectroscopy of the Seyfert 1 galaxy NGC 5548. The new observations presented here were obtained between 1990 December and 1992 October, and extend the existing datab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::b2c97d4f794abcdd8c9ad69ce7ac0cc9