An Intrinsic Short-Term Radio Variability Observed in PKS 1510-089

作者：Kadota Akiko^*; Fujisawa Kenta; Sawada Satoh Satoko; Wajima Kiyoaki; Doi Akihiro

来源：Publications of the Astronomical Society of Japan, 2012, 64(5): 109.

DOI：10.1093/pasj/64.5.109

• galaxies: active
• galaxies: quasars: individual (PKS 1510-089)
• radio continuum: galaxies

We searched a short-term radio variability in an active galactic nucleus, PKS 1510-089. Daily flux monitoring for 143 d at 8.4 GHz was performed, and VLBI observations at 8.4, 22, and 43 GHz were carried out 4 times during the flux monitoring period. As a result, variability with a time scale of 20 to 30 d was detected. The variation patterns were very much alike at three frequencies; moreover, those at 22 and 43 GHz were synchronized. These properties support that this short-term variability is an intrinsic one. The Doppler factor estimated from the variability time scale is 47. Since the Doppler factor is not extraordinary large for AGN, such intrinsic variability with a time scale of less than 30 d would exist in other AGNs.

• 出版日期2012-10-25
• 单位中国科学院国家天文台