부산대학교 도서관

Most QSOs found by low-resolution spectroscopy are known to be radio-quiet,, but QSOs selected by polarization, power-law continuum spectra, or optical variability might have different radio characteristics. We have observed a sample of 96 QSOs and other blue objects, chosen on the basis of optical variability, with the VLA at 4885 MHz. Only three were detected (LB 8755, LB 8956, and LB 9013), and two of these (LB 8755=OJ 180 and LB 9013=4C 17.46) had previously been found in radio-selected samples. For the rest, 5sigma upper limits of 2.0 mJy can be placed on their 4885 MHz flux densities. The radio-to-optical luminosity ratios of the variable components of these QSOs are more than two orders of magnitude lower than those of radio-selected QSOs. Although the detection rate is low, the detected QSOs are among the most variable in the sample observed. Future work in this field is suggested.