... Ultraviolet Mg II emission is found that signifies a stellar chromosphere -- and ... of these chromospheres can be detected in ultraviolet spectra of the same or similar ...
... extreme X-ray over optical flux ratio of blanks is not compatible with the main ... Extremely Variable AGNs None of the sources seems to be extremely variable within ...
... Quasar central engines also probe extreme conditions of gravity, that could lead us ... Detailed follow-up with optical, ultraviolet and X-ray spectra and light curves can ...
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Ссылки http://hea-www.harvard.edu/~elvis/Elvis_AGN_quasar_GCT_CFP.pdf -- 591.9 Кб -- 13.04.2011 Похожие документы
... absorption is common in the optical and ultraviolet spectra of quasars (Ulrich, 1988 ... in velocity width, the BALQSOs may be extreme examples of other associated absorbers ...
... The richest and most extreme absorption lines are found in quasars with broad absorption lines (BALs). ... of optically selected QSOs have rest-frame ultraviolet spectra showing these BALsхdeep absorption troughs displaced blueward ...
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Ссылки http://hea-www.harvard.edu/~pgreen/Papers/chandrabals01.pdf -- 161.6 Кб -- 14.09.2005 Похожие документы
... The richest and most extreme absorption lines are found in quasars with broad absorp tion lines (BALs). ... 10%х15% of optically selected QSOs have restframe ultraviolet spectra showing these BALsхdeep absorption troughs displaced ...
... 2008 Ultraviolet Observations of the X-ray Photoionized Wind of Cygnus X-1 during X ... 1997 Hopkins Ultraviolet Telescop e Observations of Her X-1 (B. Boroson, W.P. Blair ...