The Spectral Indices of Radio Sources Selected at 1.4 GHz
نویسندگان
چکیده
منابع مشابه
A Parsec - Scale Study of the 5 / 15 GHz Spectral Indices of the Compact Radio Sources in M 82
Observations of the starburst galaxy, M82, have been made with the VLA in its Aconfiguration at 15 GHz and MERLIN at 5 GHz enabling a spectral analysis of the compact radio structure on a scale of < 0.1 (1.6 pc). Crucial to these observations was the inclusion of the Pie Town VLBA antenna, which increased the resolution of the VLA observations by a factor of ∼2. A number of the weaker sources a...
متن کاملThe properties of powerful radio sources at 90 GHz
We have observed a small sample of powerful double radio sources (radio galaxies and quasars) at frequencies around 90 GHz with the BIMA millimetre array, with the intention of constraining the resolved high-frequency spectra of radio galaxies. When combined with other sources we have previously observed and with data from the BIMA archive, these observations allow us for the first time to make...
متن کاملGHz VLBI survey of compact radio sources ?
We present results from 86 GHz VLBI1 observations of 28 compact radio sources made in April 1993. All but two of the observed objects are active galactic nuclei. The remaining two objects are the galactic center Sgr A∗ and the X-ray binary star Cygnus X-3. Of the observed sources, 26 have yielded fringe detections. We present correlated flux densities, estimate the maximum observed brightness t...
متن کاملAstronomy and Astrophysics Vlba Observations of Ghz-peaked-spectrum Radio Sources at 15 Ghz
We present VLBA observations at 15 GHz of ten GHz Peaked Spectrum (GPS) radio sources. The cores are often difficult or impossible to locate. When likely cores are found, they account for a small fraction of the flux density in GPS galaxies around or below 2%, while in GPS quasars they can account for more than 20% of the total flux density. We detect low polarization in the GPS sources – i.e.,...
متن کاملVLBI observations of nineteen GHz-Peaked-Spectrum radio sources at 1.6 GHz
Abstract. Aims and Methods: We present the results of VLBI observations of nineteen GHz-Peaked-Spectrum (GPS) radio sources at 1.6 GHz. Of them, 15 sources are selected from the Parkes Half Jansky (PHJ) sample (Snellen 2002), 4 others are from our previous observation list. We aimed at imaging the structure of GPS sources, searching for Compact Symmetric Objects (CSOs) and studying the absorpti...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1972
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/155.3.385