Periodic radio variabilities in NRAO 530: a jet–disc connection?
نویسندگان
چکیده
منابع مشابه
Multi - Frequency VLBI Observations of NRAO 530
We report on VLBA observations of a γ-ray bright blazar NRAO 530 at multiple frequencies (5, 8, 15, 22, 39, 43, and 45 GHz) in 1997 and 1999. These multi-epoch multi-frequency high-resolution VLBI images exhibit a consistent coredominated morphology with a bending jet to the north of the core. The quasi-simultaneous data observed at five frequencies (5, 8, 15, 22 and 43 GHz) in February 1997 en...
متن کاملEVN , MERLIN , and VLA Observations of NRAO 530
Abstract. We present images of NRAO530 observed with the EVN (VLBI) at 5 GHz, the MERLIN at 1 .6 and 5 GHz, and the VLA at 5 and 8 GHz showing the complex morphology on scales from pc to kpc. The VLBI image shows a core-jet structure indicating a somehow oscillation trajectory on a scale of 30 mas, north to the strongest compact component (core). A core-jet structure extended to several hundred...
متن کاملSpace VLBI Observations Show Tb> 10 12 K in the Quasar NRAO 530
We present here space-based VLBI observations with VSOP and a southern hemisphere ground array of the gamma-ray blazar NRAO 530 at 1.6 GHz and 5 GHz. The brightness temperature of the core at 1.6 GHz is 5 × 10 K. The size is near the minimum observable value in the direction of NRAO 530 due to interstellar scattering. The 5 GHz data show a single component with a brightness temperature of ∼ 3 ×...
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The analysis of the IUE low resolution spectra of SS Cyg in quiescence clearly shows modulations with the orbital phase of the continuum and the emission lines total area. The shape of such modulations is depending on the type of the optical outburst preceding the quiescent phase in which the UV spectra were collected. This behaviour, together with those in other wavelength regions, could be ex...
متن کاملNRAO/Socorro Colloq. Abstract
The Centre of our Galaxy the Central Molecular Zone (CMZ), contains 80% of all dense gas in the Galaxy, but holds only about 5% of current star formation. The CMZ is hotter, denser and more turbulent than anywhere else in the Galaxy. It is a truly unique place. It is also important as the CMZ has analogues in other galaxies that are typically used to estimate extragalactic star formation rates....
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2013
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stt1265