{"title":"低红移和高红移类星体的毫弧秒尺度结构特性。","authors":"S. Frey , L.I. Gurvits","doi":"10.1016/S0083-6656(97)00018-4","DOIUrl":null,"url":null,"abstract":"<div><p>We analyse VLBI data of a sample of radio quasars in order to study the milliarcsecond scale structural properties of quasars in the widest available redshift range of 0.2 < <em>z</em> < 4.5. The statistical study is based on a combination of the 5 GHz Caltech-Jodrell VLBI survey and our data for a set of extremely high redshift sources. We show that the apparently less prominent milliarcsecond scale structures found in <em>z</em> > 3 quasars do not contradict the assumption of intrinsic similarity of radio sources at different redshifts and may be explained by a difference in spectral properties of cores and extended components (jets).</p></div>","PeriodicalId":101275,"journal":{"name":"Vistas in Astronomy","volume":"41 2","pages":"Pages 271-274"},"PeriodicalIF":0.0000,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0083-6656(97)00018-4","citationCount":"2","resultStr":"{\"title\":\"On the milliarcsecond scale structural properties of low and high redshift quasars\",\"authors\":\"S. Frey , L.I. Gurvits\",\"doi\":\"10.1016/S0083-6656(97)00018-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We analyse VLBI data of a sample of radio quasars in order to study the milliarcsecond scale structural properties of quasars in the widest available redshift range of 0.2 < <em>z</em> < 4.5. The statistical study is based on a combination of the 5 GHz Caltech-Jodrell VLBI survey and our data for a set of extremely high redshift sources. We show that the apparently less prominent milliarcsecond scale structures found in <em>z</em> > 3 quasars do not contradict the assumption of intrinsic similarity of radio sources at different redshifts and may be explained by a difference in spectral properties of cores and extended components (jets).</p></div>\",\"PeriodicalId\":101275,\"journal\":{\"name\":\"Vistas in Astronomy\",\"volume\":\"41 2\",\"pages\":\"Pages 271-274\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1997-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0083-6656(97)00018-4\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Vistas in Astronomy\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0083665697000184\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vistas in Astronomy","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0083665697000184","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
On the milliarcsecond scale structural properties of low and high redshift quasars
We analyse VLBI data of a sample of radio quasars in order to study the milliarcsecond scale structural properties of quasars in the widest available redshift range of 0.2 < z < 4.5. The statistical study is based on a combination of the 5 GHz Caltech-Jodrell VLBI survey and our data for a set of extremely high redshift sources. We show that the apparently less prominent milliarcsecond scale structures found in z > 3 quasars do not contradict the assumption of intrinsic similarity of radio sources at different redshifts and may be explained by a difference in spectral properties of cores and extended components (jets).
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