Showing papers by "Maria Santos-Lleo published in 1998"
University of Leicester1, European Space Agency2, Goddard Space Flight Center3, University of St Andrews4, Johns Hopkins University5, University of California, Los Angeles6, Tel Aviv University7, Ohio State University8, New Mexico State University9, Moscow State University10, University of California, Berkeley11, University of Nebraska–Lincoln12, Universities Space Research Association13, Space Telescope Science Institute14, Harvard University15, Western Michigan University16, University of Michigan17, University of Manchester18, University of Toronto19, Dominion Astrophysical Observatory20, Chinese Academy of Sciences21, Russian Academy of Sciences22, National Institute of Standards and Technology23, National Central University24
TL;DR: The International Ultraviolet Explorer satellite was used to observe the broad-line radio galaxy 3C 3903 during the period 1994 December 31-1996 March 5 Spectra were obtained every 6-10 days as mentioned in this paper.
Abstract: As part of an extensive multiwavelength monitoring campaign, the International Ultraviolet Explorer satellite was used to observe the broad-line radio galaxy 3C 3903 during the period 1994 December 31-1996 March 5 Spectra were obtained every 6-10 days The UV continuum varied by a factor of 7 through the campaign, while the broad emission lines varied by factors of 2-5 Unlike previously monitored Seyfert 1 galaxies, in which the X-ray continuum generally varies with a larger amplitude than the UV, in 3C 3903 the UV continuum light curve is similar in both amplitude and shape to the X-ray light curve observed by ROSAT The UV broad emission-line variability lags that of the UV continuum by 35-70 days for Lyα and C IV, values larger than those found for Seyfert 1 galaxies of comparable UV luminosity These lags are also larger than those found for the Balmer lines in 3C 3903 over the same period The red and blue wings of C IV and Lyα vary in phase, suggesting that radial motion does not dominate the kinematics of the UV line-emitting gas Comparison with archival data provides evidence for velocity-dependent changes in the Lyα and C IV line profiles, indicating evolution in the detailed properties and/or distribution of the broad-line emitting gas
116 citations