摘要
1.IntroductionQuasarsarethemostluminousobjectsintheuniverseandthehighestredshiftobjectswecandirectlyobserve.Understandingtheiremissionlineshasacosmologicalimperativesincetheirspectradependonluminosity(the“Baldwineffect”;Baldwin1977,Osmeretal.1994).Oncewecandirectlymeasuretheirluminositythequasarswillgaugetheexpansionoftheuniverseatredshiftsz∧5.Atthesametime,theoriginofthechemicalelementsremainsacentralthemeacrossmuchofstellar,galactic,andextragalacticastrophysics.Quasarsprobeearlyepochsinthefor...
出版日期
2001年01月11日(中国期刊网平台首次上网日期,不代表论文的发表时间)