Radio observations of a new class of optically selected Quasi-Stellar Objects

Journal Article · Mon Dec 01 04:00:00 EST 1980 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/158481· OSTI ID:6525076

Condon, J J; Condon, M A; Mitchell, K J; Usher, P D

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.

• Research Organization: Alfred P. Sloan Foundation Fellow
• OSTI ID: 6525076
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 242:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
FLUX DENSITY
QUASARS
RADIATION FLUX
RADIATIONS
RADIOWAVE RADIATION
SPECTRA
VARIATIONS
VISIBLE RADIATION