{"title":"The effect of an ellipsoidal distribution of star velocities on galactic density waves","authors":"Song Guo-xuan","doi":"10.1016/0146-6364(80)90032-8","DOIUrl":null,"url":null,"abstract":"<div><p>The fact that the peculiar velocities of stars follow an ellipsoidal distribution implies that the perturbations on a pattern of density waves are unstable. The instabilities give rise to an amplification of the waves, which can compensate completely Toomre's dissipation and maintain the waves for a long time.</p></div>","PeriodicalId":100241,"journal":{"name":"Chinese Astronomy","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-6364(80)90032-8","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chinese Astronomy","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0146636480900328","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The fact that the peculiar velocities of stars follow an ellipsoidal distribution implies that the perturbations on a pattern of density waves are unstable. The instabilities give rise to an amplification of the waves, which can compensate completely Toomre's dissipation and maintain the waves for a long time.
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