The spectral evolution of high-frequency radio outbursts in the blazar PKS 0420-014
نویسندگان
چکیده
منابع مشابه
Two classes of radio flares in the blazar PKS 0420 − 014
The two 5GHz VLBI (Very Long Baseline Interferometry) observations (1996 June and 1997 November) presented in this paper, combined with several former VLBI observations at 8.4GHz and 5GHz, suggest that the radio flares of the blazar PKS 0420−014 can be divided into two classes according to their geometric origins in 5 or 8.4GHz VLBI maps and the properties of light curves. One class of flares, ...
متن کاملThree-year VLBI monitoring of PKS 0420–014
We present nine 3.6-cm VLBI observations of the optically violent variable (OVV) flat-spectrum radio quasar PKS 0420–014 taken over a period of three years (1989.32– 1992.48); we also show a VLBI map from observations at 43 GHz in 1992.4. We trace jet evolution and variability with individual components. We find superluminal motion with βapp ∼ 2–14c for five jet components. Components ejected m...
متن کاملRapid Multiwaveband Polarization Variability in the Quasar PKS 0420−014: Optical Emission from the Compact Radio Jet
An 11-day monitoring campaign in late 2005 reveals clear correlation in polarization between the optical emission and the region of the intensity peak (the “pseudocore”) at the upstream end of the jet in 43 GHz Very Long Baseline Array images in the highly variable quasar PKS 0420−014. The electric-vector position angle (EVPA) of the pseudocore rotated by about 80 in four VLBA observations over...
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چکیده ارتباط در کلاس به عوامل زیادی از جمله معلمان، دانش آموزان، برنامه های درسی و از همه مهم تر، مواد آموزشی وابسته است. در تدریس ارتباطی زبان که تاکید زیادی بر توانش ارتباطی دارد، کتاب درسی به عنوان عامل موثر بر پویایی کلاس محسوب میگردد که درس ها را از طریق فراهم آوردن متن ارتباط کلاسی و هم چنین نوع تمرین زبانی که دانش آموزان در طول فعالیت های کلاسی به آن مشغول اند، کنترل می کند. این حقیقت ک...
15 صفحه اولthe impact of musical texts on the text recall of young learners of english in isfahan junior high schools
abstract although music possesses some kind of power and using it has been welcome by many students in language classrooms, it seems that they take a non-serious image of the lesson while listening to songs and they may think that it is a matter of fun. the main objective of the present study was to investigate whether learning a foreign language through musical texts (songs) can have an impac...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1995
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/275.4.1146