Zobrazeno 1 - 10
of 144
pro vyhledávání: '"M. V. Penston"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 250:657-665
The results of numerical simulations aimed at evaluating techniques for potential measurements of the deuterium abundance in extragalactic absorption clouds are described. The calculations provide a guide to the precision with which we may hope to me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b74b986d7b3b1475d35faae5b6f04ec
https://doi.org/10.1093/mnras/250.4.657
https://doi.org/10.1093/mnras/250.4.657
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 249:577-583
High signal-to-noise spectra of the Hβ region of eight radio-loud quasars are presented in an investigation seeking evidence for the emission of this line from a disc. Although no double-humped profile was found expected in simple versions of the di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af1578d5c36a1c76fd0dcd243ff6b96b
https://doi.org/10.1093/mnras/249.4.577
https://doi.org/10.1093/mnras/249.4.577
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 249:145-158
Medium-resolution observations of nine QSOs whose lines-of-sight pass within 45 h -1 kpc of low-redshift galaxies are presented. Ca II absorption is detected only for QSO 1543+489. With these data, supplemented by previously published results, the Ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0321fd763bc1bf0dc4762a285871486a
https://doi.org/10.1093/mnras/249.1.145
https://doi.org/10.1093/mnras/249.1.145
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 248:153-158
Spectroscopic observations of the quasar Mrk 205 are presented, and an attempt is made to detect Ca II and Na I absorption from the intervening galaxy NGC 4319.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3c20d49cbbeec9ab85abdeb2e73dcc8
https://doi.org/10.1093/mnras/248.1.153
https://doi.org/10.1093/mnras/248.1.153
Autor:
M. V. Penston
Publikováno v:
The Physics of Accretion onto Compact Objects ISBN: 9783540171959
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea58cb96475100a709220deea1cda299
https://doi.org/10.1007/3-540-17195-9_19
https://doi.org/10.1007/3-540-17195-9_19
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 242:370-378
Une analyse en composantes principales est effectuee sur les spectres IUE de la galaxie Seyfert NGC 4151 en recherchant le nombre et la forme de spectres lineairement independants qui sont necessaires pour reconstruire les donnees dans les limites d'
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dec93e7c34890a94dec6dfd422692a9e
https://doi.org/10.1093/mnras/242.3.370
https://doi.org/10.1093/mnras/242.3.370
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 242:33P-39P
Les observations avec l'interferometre Fabry-Perot d'imagerie TAURUS-2, de la galaxie active NGC 1275 sont presentees. La nature du gaz a grande vitesse de la galaxie est analysee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5b2d0cd1da001a5e3c9cd4c3ff30226
https://doi.org/10.1093/mnras/242.1.33p
https://doi.org/10.1093/mnras/242.1.33p
Autor:
Jasper Wall, M. V. Penston, John W. Crawford, Roberto Terlevich, Andy Lawrence, M. Rowan-Robinson, D. H. P. Jones, K. J. Leech
Publikováno v:
Dynamics and Interactions of Galaxies ISBN: 9783642752759
We decided to study a complete sample of, predominantly high IR luminosity, IRAS galaxies to determine the fractions that were interacting or active.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9e8b371147e2f54f56d295bd099997b
https://doi.org/10.1007/978-3-642-75273-5_30
https://doi.org/10.1007/978-3-642-75273-5_30
Autor:
Wei-Hsin Sun, Horace A. Smith, Paul S. Smith, Ari Laor, J. Penfold, B. J. Wills, Bradley M. Peterson, N. G. Bochkarev, C. Mendes de Oliveira, Wolfram Kollatschny, Alla I. Shapovalova, Joseph C. Shields, Anuradha Koratkar, T. E. Carone, Michael W. Richmond, M. A. Malkan, C. M. Gaskell, Kirk T. Korista, Enrique Pérez, Derek Wills, J. B. Hutchings, N. J. Lame, M. Dietrich, Martin Elvis, Belinda Jane Wilkes, John P. Huchra, E. I. Rosenblatt, Sylvain Veilleux, Todd A. Boroson, Alexei V. Filippenko, Hagai Netzer, M. V. Penston, Richard W. Pogge, R. Bertram, R. M. Wagner, U. Thiele, Gordon M. MacAlpine, Jill Bechtold
Publikováno v:
The Astrophysical Journal. 408:416
Measurements of optical emission-line flux variations based on spectra of the Seyfert galaxy NGC 5548 obtained between December 1988 and October 1989 are reported. All of the measured optical emission lines, H-alpha, H-beta, H-gamma, He I 5876, and H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cf79ee5f30d6d8c20e1e3040bfce293
https://doi.org/10.1086/172599
https://doi.org/10.1086/172599
Autor:
G. C. Perola, G. E. Bromage, M. A. J. Snijders, A. Elvius, M. H. Ulrich, J. Clavel, A. Boksenberg, M. V. Penston
Publikováno v:
The Astrophysical Journal. 382:483
From the examination of all the low-dispersion IUE spectra of NGC 4151 taken since the launch of IUE in 1978, including the latest data taken in 1990, we follow the evolution of this active nucleus on time scales ranging from days to 10 years. We con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82d2e7587830a0faf79d3c90beee53e5
https://doi.org/10.1086/170735
https://doi.org/10.1086/170735