The low-redshift Ly forest towards 3C 273

Autor: R. J. Weymann, Edward B. Jenkins, Robert F. Carswell, Gerard M. Williger, K. R. Sembach, Todd M. Tripp, L. Haberzettl, Romeel Davé, Sara R. Heap

Publikováno v: Monthly Notices of the Royal Astronomical Society. 405:1736-1758

We present an analysis of the Ly-a forest toward 3C 273 from the Space Telescope Imaging Spectrograph at ~7 km/s resolution, along with re-processed data from the Far Ultraviolet Spectroscopic Explorer. The high UV flux of 3C 273 allows us to probe t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2905fdc247085e928b2617d2606b934b
https://doi.org/10.1111/j.1365-2966.2010.16519.x

Steps toward determination of the size and structure of the broad-line region in active galatic nuclei. 8: an intensive HST, IUE, and ground-based study of NGC 5548

Autor: K. T. Korista, D. Alloin, P. Barr, J. Clavel, R. D. Cohen, D. M. Crenshaw, I. N. Evans, K. Horne, A. P. Koratkar, G. A. Kriss, J. H. Krolik, M. A. Malkan, S. L. Morris, H. Netzer, P. T. O'Brien, B. M. Peterson, G. A. Reichert, P. M. Rodriguez-Pascual, W. Wamsteker, K. S. J. Anderson, D. J. Axon, E. Benitez, P. Berlind, R. Bertram, J. H., Jr. Blackwell, N. G. Bochkarev, C. Boisson, M. Carini, R. Carrillo, T. E. Carone, F.-Z. Cheng, J. A. Christensen, K. K. Chuvaev, M. Dietrich, J. J. Dokter, V. Doroshenko, D. Dultzin-Hacyan, M. N. England, B. R. Espey, A. V. Filippenko, C. M. Gaskell, M. R. Goad, L. C. Ho, J. P. Huchra, X. J. Jiang, S. Kaspi, W. Kollatschny, A. Laor, J.-P. Luminet, G. M. MacAlpine, J. W. MacKenty, Yu. F. Malkov, D. Maoz, P. G. Martin, T. Matheson, B. McCollum, N. Merkulova, L. Metik, M. Mignoli, H. R. Miller, M. G. Pastoriza, D. Pelat, J. Penfold, M. Perez, G. C. Perola, J. L. Persaud, J. Peters, R. Pitts, R. W. Pogge, I. Pronik, V. I. Pronik, R. L. Ptak, L. Rawley, M. C. Recondo-Gonzalez, J. M. Rodriguez-Espinosa, W. Romanishin, A. C. Sadun, I. Salamanca, M. Santos-Lleo, K. Sekiguchi, S. G. Sergeev, A. I. Shapovalova, J. C. Shields, C. Shrader, J. M. Shull, N. A. Silbermann, M. L. Sitko, D. R. Skillman, H. A. Smith, S. M. Smith, M. A. J. Snijders, L. S. Sparke, G. M. Stirpe, R. E. Stoner, W.-H. Sun, U. Thiele, S. Tokarz, Z. I. Tsvetanov, D. A. Turnshek, S. Veilleux, R. M. Wagner, S. J. Wagner, I. Wanders, T. Wang, W. F. Welsh, R. J. Weymann, R. J. White, B. J. Wilkes, B. J. Wills, C. Winge, H. Wu, Z. L. Zou

Publikováno v: The Astrophysical Journal Supplement Series. 97:285

We present the data and initial results from a combined Hubble Space Telescope (HST)/IUE/ground-based spectroscopic monitoring campaign on the Seyfert 1 galaxy NGC 5548 that was undertaken in order to address questions that require both higher tempor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bdcfbe7a6709d8574c2675861f391094
https://doi.org/10.1086/192144

Spectroscopy of 26 QSO candidates from the Jodrell Bank 966-MHz survey

Autor: D. Walsh, J. M. Beckers, R. F. Carswell, R. J. Weymann

Publikováno v: Monthly Notices of the Royal Astronomical Society. 211:105-109

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ffde0e8a24b4f5410671fc26fdd9ea8
https://doi.org/10.1093/mnras/211.1.105

A Summary of the Properties of Zabs > Zem Systems and Some Comments on the Origins of QSO Absorption Line Systems

Autor: R J Weymann, R E Williams

Publikováno v: Physica Scripta. 17:217-223

Z abs > Z em systems are "real" in the sense of not being artifacts of measuring errors, but Z em may not represent the true Z of the QSO. However, a specific simple model involving occultation of outflowing gas by an opaque central object produces t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d80423997b25753a6b8d37e95a76c2b1
https://doi.org/10.1088/0031-8949/17/3/014

0957 + 561 A, B: twin quasistellar objects or gravitational lens?

Autor: R. J. Weymann, R. F. Carswell, D. Walsh

Publikováno v: Nature. 279:381-384

0957 + 561 A, B are two QSOs of mag 17 with 5.7 arc s separation at redshift 1.405. Their spectra leave little doubt that they are associated. Difficulties arise in describing them as two distinct objects and the possibility that they are two images

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f75efd13cb1493cc5e5874ccbc408c9
https://doi.org/10.1038/279381a0