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相关论文: Large-scale correlations between QSOs and IRAS gal…

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We review some aspects of radio continuum polarimetric imaging of high redshift radio galaxies. The correlation between extreme values of Faraday rotation observed toward radio emitting structures in nearby radio galaxies, and X-ray…

天体物理学 · 物理学 2007-05-23 C. L. Carilli , H. J. A. Rottgering , G. K. Miley L. Pentericci , D. E. Harris

We examine the projected correlation of galaxies with mass from small scales (<few hundred kpc) where individual dark matter halos dominate, out to 15 Mpc where correlated large-scale structure dominates. We investigate these profiles as a…

宇宙学与河外天体物理 · 物理学 2015-06-11 Ami Choi , J. Anthony Tyson , Chris B. Morrison , M. James Jee , Samuel J. Schmidt , Vera E. Margoniner , David M. Wittman

We compute the cross-correlation between a sample of 14,000 radio-loud AGN (RLAGN) with redshifts between 0.4 and 0.8 selected from the Sloan Digital Sky Survey and a reference sample of 1.2 million luminous red galaxies in the same…

宇宙学与河外天体物理 · 物理学 2011-03-28 Emilio Donoso , Cheng Li , Guinevere Kauffmann , Philip N. Best , Timothy M. Heckman

This is the third in a series of papers that present observations and results for a sample of 76 ultra-steep-spectrum radio sources designed to find galaxies at high redshift. Here we present multi-frequency radio observations, from the…

天体物理学 · 物理学 2009-11-11 I. J. Klamer , R. D. Ekers , J. J. Bryant , R. W. Hunstead , E. M. Sadler , C. De Breuck

The nature of the optical--radio correlations for powerful radio galaxies is investigated using spectroscopic observations of a complete sample of southern 2Jy radio sources. In line with previous work, we find that significant correlations…

天体物理学 · 物理学 2009-10-30 C. N. Tadhunter , R. Morganti , A. Robinson , R. Dickson , M. Villar-Martin , R. A. E. Fosbury

Via the magnification bias, gravitational lensing by large-scale structures causes angular cross-correlations between distant quasars and foreground galaxies on angular scales of arc minutes and above. We investigate the three-point…

天体物理学 · 物理学 2007-05-23 Brice Menard , Matthias Bartelmann , Yannick Mellier

We examine the relationship between galaxies and the intergalactic medium at z < 1 using a group of three closely spaced background QSOs with z_em ~1 observed with the Hubble Space Telescope. Using a new grouping algorithm, we identify…

宇宙学与河外天体物理 · 物理学 2015-05-14 Neil H. M. Crighton , Simon L. Morris , Jill Bechtold , Robert A. Crain , Buell T. Jannuzi , Allen Shone , Tom Theuns

We present high resolution (arcsecond or better) observations made with the Karl G. Jansky Very Large Array of 123 radio-loud quasars with redshifts in the range $2.5 \leq z \leq 5.28$ that form a complete flux limited sample ($\geq 70$ mJy…

星系天体物理 · 物理学 2014-06-19 Doug B. Gobeille , John F. C. Wardle , C. C. Cheung

This paper presents the results of spectral observations for the largest complete sample of very luminous IRAS galaxies obtained to date. The sample consists of those 73 objects for which log (L_IR/L_sun) => 11.5 (H0=50 km/s/Mpc, q0=0.5)…

天体物理学 · 物理学 2016-08-30 H. Wu , Z. L. Zou , X. Y. Xia , Z. G. Deng

We have started a search for High Redshift Radio Galaxies (HZRGs) in an area covering 7 sr by selecting a sample of Ultra Steep Spectrum (USS) sources with a low flux density cut-off S(1400 MHz) > 10 mJy and a steep spectral index cut-off…

天体物理学 · 物理学 2016-01-27 Carlos De Breuck , Wil van Breugel , Huub Rottgering , George Miley

We investigate the large-scale clustering of radio sources in the Green Bank and Parkes-MIT-NRAO 4.85 GHz surveys by measuring the angular two-point correlation function w(\theta). Excluding contaminated areas, the two surveys together…

天体物理学 · 物理学 2015-06-24 A. J. Loan , J. V. Wall , O. Lahav

We have used integral two-point spatial correlation function and its second derivative to analyze the distribution of quasars in three very deep surveys published in the literature. Statistically significant ($\sim 2-3\sigma $) correlations…

天体物理学 · 物理学 2007-05-23 Andrey V. Kravtsov

The large-scale structure of high-redshift galaxies produces correlated anisotropy in the far-infrared background (FIRB). In regions of the sky where the thermal emission from Galactic dust is well below average, these high-redshift…

天体物理学 · 物理学 2009-10-31 L. Knox , A. Cooray , D. Eisenstein , Z. Haiman

We present the results from a pilot study with the Karl G. Jansky Very Large Array (JVLA) to determine the radio morphologies of extended radio sources and the properties of their host-galaxies in 10 massive galaxy clusters at z~1, an epoch…

We summarize observations of the properties of powerful radio galaxies and their environments from z = 0 to 5. These data show that some high redshift radio galaxies inhabit regions of gas and galaxy over-densities indicative of…

Hubble Space Telescope images are presented of a sample of 28 3CR radio galaxies with redshifts in the range 0.6 < z < 1.8, together with maps at comparable angular resolution of their radio structure, taken using the Very Large Array.…

天体物理学 · 物理学 2015-06-24 P. N. Best , M. S. Longair , H. J. A. R"ottgering

The role of radio mode feedback in non radio-loud quasars needs to be explored in depth to determine its true importance. Its effects can be identified based on the evidence of interactions between the radio structures and the ambient…

Very deep imaging data of three optically luminous radio-loud quasars with redshifts between z=0.9 and z=1.36 are presented. The data are complete for galaxies down to R=26. There is no evidence for excess numbers of galaxies around the…

天体物理学 · 物理学 2007-05-23 J. W. Fried

The radio luminosities at 1.4 GHz is tightly correlated with the far-infrared luminosities for various galaxy types (e.g. [16, 6, 2]) over a wide range of redshift (see e.g. [5, 1, 15, 8, 7]). The relationship is widely believed to be…

星系天体物理 · 物理学 2016-04-05 Solohery M. Randriamampandry

Deep, narrow-band Halpha observations taken with the TAURUS Tunable Filter (TTF) on the 4.2m WHT telescope are presented for two nearby radio galaxies with strong jet-cloud interactions. Although the brightest emission line components are…

天体物理学 · 物理学 2009-10-31 C. N. Tadhunter , M. Villar-Martin , R. Morganti , J. Bland-Hawthorn , D. Axon