【摘 要】
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Close binary black holes(BBH)are important not only in astrophysics but they would be the strongest gravitational wave sources in the universe.Galaxy-galaxy
【出 处】
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国际天文学联合会第312次专题会议
论文部分内容阅读
Close binary black holes(BBH)are important not only in astrophysics but they would be the strongest gravitational wave sources in the universe.Galaxy-galaxy merging systems are mostly found in optical and X-ray images.In radio,however,an advantage is the VLBI which can resolve the close binary system at pc scale,if their nuclei are radio loud.Recently we get the archive VLBI data of PKS 1155+251(SDSS J115825.78+245017.9),which we select as a BBH candidate.PKS 1155+251 is a flat spectrum radio quasar,at z=0.2016,it has twin core-jets like VLBI structure,in order to get the advanced confirm,we caculated the spectral index of this source,one of components show GPS properties which suggested as the young active glactic nuclei.Further studies with high frequency VLBI observations are required to confirm if they are true BBHs.
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