Zobrazeno 1 - 10
of 19
pro vyhledávání: '"D. A. Turnshek"'
Publikováno v:
The Astrophysical Journal. 628:637-654
We present the results of a MgII absorption-line survey using QSO spectra from the SDSS EDR. Over 1,300 doublets with rest equivalent widths greater than 0.3\AA and redshifts $0.366 \le z \le 2.269$ were identified and measured. We find that the $\la
Autor:
Alain Smette, Jacqueline Bergeron, W. M. Lane, Eric M. Monier, Sandhya M. Rao, D. A. Turnshek, Daniel Nestor
Publikováno v:
The Astrophysical Journal. 553:288-298
New optical and infrared observations along the sight-line toward the quasar OI 363 (0738+313) are presented and discussed. Excluding systems which lack confirming UV spectroscopic observations of the actual Lyman alpha line, this sight-line presentl
Publikováno v:
The Astronomical Journal. 116:26-30
We report the discovery of two low redshift HI 21cm absorbers, one at z = 0.2212 towards the z_{em} = 0.630 quasar OI 363 (B0738+313), and the other at z = 0.3127 towards PKS B1127-145 (z_{em} = 1.187). Both were found during a survey of MgII selecte
Autor:
Jacqueline Bergeron, George F. Hartig, Ray J. Weymann, Blair D. Savage, Wallace L. W. Sargent, Arthur M. Wolfe, S. Kirhakos, Buell T. Jannuzi, John N. Bahcall, D. A. Turnshek, Donald P. Schneider, Alec Boksenberg
Publikováno v:
The Astrophysical Journal. 470:L11-L14
We report the discovery of a high-ionization broad absorption line system at a redshift of z_abs=0.695 in the spectrum of the z_em=1.052 radio-quiet quasar PG 2302+039. Broad absorption with FWHM from 3,000 to 5,000 km/s is detected from C IV, N V, a
Autor:
D. A. Turnshek, V. K. Khersonsky
Publikováno v:
QSO Absorption Lines ISBN: 9783662223734
The radial distributions of dark matter (DM) density and temperature in Lyα clouds seen in QSO spectra are discussed in the framework of a ‘minihalo’ model. Available observational data on the distribution of Lyα clouds in column density, in co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98a0443dd87451043b5bc2348a6ce46b
https://doi.org/10.1007/978-3-540-49458-4_71
https://doi.org/10.1007/978-3-540-49458-4_71
Autor:
V. K. Khersonsky, D. A. Turnshek
Publikováno v:
QSO Absorption Lines ISBN: 9783662223734
Comparison of the observed properties of damped Lyα absorbers (DLAs) seen in QSO spectra with different structures in the interstellar medium of our own and nearby galaxies shows that these absorbers may be interpreted as giant hydrogen clouds (GHCs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c96319ed0773d6af10950b83643cd61
https://doi.org/10.1007/978-3-540-49458-4_6
https://doi.org/10.1007/978-3-540-49458-4_6
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
Publikováno v:
The Astronomical Journal. 107:1937
Autor:
J. Anthony Tyson, James Liebert, Diane E. Turnshek, D. A. Turnshek, David W. Latham, J. Roger P. Angel, R. J. Weymann, Richard F. Green
Publikováno v:
Nature. 285:641-643
Recently, Walsh, Carswell and Weymann1 reported the discovery of two objects (0957+56A,B) with identical spectra and separated by 6 arc min. They suggested that a gravitational lens was responsible. The cumulative result of subsequent work on this ob
Publikováno v:
The Astronomical Journal. 85:1638
Spectroscopy and polarimetry of several very red stars, noted on Near Infrared Photographic Sky Survey photographs in the region of NGC 1333, have yielded a 'map' suggesting the extent of polarization arising from a two-cloud structure in the region.