{"title":"恒星速度椭球分布对星系密度波的影响","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":"4 4","pages":"Pages 398-401"},"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":"{\"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\":\"4 4\",\"pages\":\"Pages 398-401\"},\"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}","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}
The effect of an ellipsoidal distribution of star velocities on galactic density waves
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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