Low power compact radio galaxies at high angular resolution
نویسندگان
چکیده
منابع مشابه
Low Power Compact Radio Galaxies at High Angular Resolution
We present sub-arcsecond resolution multi-frequency (8 and 22 GHz) VLA images of five low power compact (LPC) radio sources, and phase referenced VLBA images at 1.6 GHz of their nuclear regions. At the VLA resolution we resolve the structure and identify component positions and flux densities. The phase referenced VLBA data at 1.6 GHz reveals flat-spectrum, compact cores (down to a few milliJan...
متن کاملThe angular power spectrum of NVSS radio galaxies
We measure the angular power spectrum Cl of radio galaxies in the NRAO VLA Sky Survey (NVSS) using two independent methods: direct spherical harmonic analysis and maximum likelihood estimation. The results are consistent and can be understood using models for the spatial matter power spectrum and for the redshift distribution of radio galaxies at mJy flux-density levels. A good fit to the angul...
متن کاملVlbi Observations of Low Power Radio Galaxies
The parsec scale properties of low power radio galaxies are reviewed here, using the available data on 12 FR I galaxies. The most frequent radio structure is an asymmetric parsec-scale morphology, i.e. core and one-sided jet. It is shared by 9 (possibly 10) of the 12 mapped radio galaxies. One (possibly 2) of the other galaxies has (have) a two-sided jet emission. Two sources are known from pub...
متن کاملHigh-resolution radio observations of submillimetre galaxies
We have produced sensitive, high-resolution radio maps of 12 submillimetre (submm) galaxies (SMGs) in the Lockman Hole using combined Multi-Element Radio-Linked Interferometer Network (MERLIN) and Very Large Array (VLA) data at a frequency of 1.4 GHz. Integrating for 350 hr yielded an r.m.s. noise of 6.0μJy beam and a resolution of 0.2–0.5 arcsec. For the first time, wide-field data from the tw...
متن کاملThe “ angular size – redshift ” relation for compact radio structures in quasars and radio galaxies ?
We discuss the “angular size – redshift” relation for compact radio sources distributed over a wide range of redshifts 0.011 ≤ z ≤ 4.72. Our study is based on a sample of 330 5 GHz VLBI contour maps taken from the literature. Unlike extended source samples, the “angular size – redshift” relation for compact radio sources appears consistent with the predictions of standard Friedmann world models...
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: Astronomy & Astrophysics
سال: 2005
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20053347