Zobrazeno 1 - 10
of 38
pro vyhledávání: '"R W, Lyons"'
Autor:
E. M. Burbidge, R. W. Lyons, Grzegorz Madejski, E. A. Beaver, Vesa T. Junkkarinen, Ross D. Cohen
Publikováno v:
The Astrophysical Journal. 614:658-670
We present new HST STIS NUV-MAMA and STIS CCD observations of the BL Lac object AO 0235+164 and the intervening damped Ly alpha (DLA) line at z_a = 0.524. The line profile gives N(H I) = 5 +/- 1 x 10^{21} cm^{-2} and, combined with the H I 21 cm abso
Publikováno v:
The Astrophysical Journal. 477:568-573
We present HST/FOS spectra of the two bright images (A and B) of the gravitationally lensed QSO 0957+561 in the wavelength range 2200-3300 A. We find that the absorption system (Z(sub abs)) = 1.3911) near z(sub em) is a weak, damped Ly alpha system w
Autor:
Gregory A. Shields, R. W. Lyons, E. M. Burbidge, Vesa T. Junkkarinen, Fred Hamann, E. A. Beaver, Ross D. Cohen
Imaging and spectroscopy with HST show that LBQS 0103-2753 (V = 17.8, z = 0.848) is a binary quasar with a separation of 0.3 arcsec or 2.3 kpc. This is by far the smallest separation binary quasar reported to date. The two components have very differ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90378f08f2d92b00bf68d505b64681e3
http://arxiv.org/abs/astro-ph/0102501
http://arxiv.org/abs/astro-ph/0102501
Autor:
E. M. Burbidge, Fred Hamann, Vesa T. Junkkarinen, E. A. Beaver, Ross D. Cohen, Gregory A. Shields, R. W. Lyons
Publikováno v:
AIP Conference Proceedings.
LBQS 0103$-$2753 is a binary quasar with a separation of only 0.3 arcsec. The projected spacing of 2.3 kpc at the distance of the source (z = 0.848) is much smaller than that of any other known binary QSO. The binary nature is demonstrated by the ver
Autor:
D. J. Barlow, C. T. Bolton, Francis C. Fekel, R. W. Lyons, Harold A. McAlister, R. F. Rees, W. I. Hartkopf, C. D. Scarfe
Publikováno v:
International Astronomical Union Colloquium. 135:567-569
HR 6469 consists of an evolved G5 star and a close pair of fainter stars, probably both on the main sequence. The period of the close pair is just over two days, and shallow eclipses have been detected (Boyd et al. 1985), although no analysis of the
We use new UV and optical spectra and an archival HST-WFPC2 image to study the z_a~z_e absorber in the z_e = 0.20 QSO PKS 2135-147. The UV spectra, obtained with HST-FOS, show strong z_a~z_e absorption lines of C IV, N V, O VI, Ly-alpha and Ly-beta.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22166ee3e8100c75506bf6d3af47b13b
Publikováno v:
Topics in health information management. 15(4)
As databases are used by a greater variety of people, highly technical methods of designing them are giving way to more human, user-centered approaches. The article describes a human approach to designing a complex, multiuse database with limited res
Publikováno v:
The Astronomical Journal. 112:2533
Results obtained with the Hubble Space Telescope on the highly variable radio, x-ray, and gamma-ray emitting QSO (or BL Lac object) AO 0235 + 164 are presented and analyzed. WFPC2 images were obtained in 1994 June, when AO 0235 + 164 was bright (m ap
Publikováno v:
The Astrophysical Journal. 456:132
We present imaging and spectroscopy of the quasar 3CR 196 (z(sub e) = 0.871), which has 21 cm and optical absorption at z(sub a) = 0.437. We observed the region of Ly alpha absorption in 3CR 196 at z(sub a) = 0.437 with the Faint Object Spectrograph
Publikováno v:
The Astronomical Journal. 110:1544