On the Keplerian Rotation Curves of Galaxies

Publications of the Astronomical Society of Japan

Sofue, Yoshiaki¹  Honma, Mareki¹ 

[1] Institute of Astronomy, Faculty of Science, The University of Tokyo, Mitaka, Tokyo 181 E-mail(MH):

关键词: "Dark matter";    "Galaxies: spiral";    Rotation;   

DOI  :  10.1093/pasj/49.5.539

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

WeproposeacriterionforexaminingwhetherornottheuncertaintyoftheouterrotationcurvesissufficientlysmalltodistinguishaKeplerianrotationcurvefromflatones.WehaveappliedthiscriteriontobothKeplerianandnon-Keplerianrotationcurvessofarobtained,andinvestigatedtheirrelativefraction.Wealsostudiedtheminimumextentofthedarkhalosindicatedbynon-Keplerianrotationcurvesusingthecriterion.WehavefoundthatonecannotruleoutthepossibilitythatasignificantfractionofrotationcurvesbecomeKeplerianwithin10-timesthediskscalelength.IftheKeplerianrotationcurvessofarobservedtracethemasstruncation,severalgalaxiesmayhaverathersmallhalos,theextentofwhichisnotlargerthantwicethatoftheopticaldisk.

【 授权许可】

Unknown