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相关论文: The WEAVE-LOFAR Survey

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We present an analysis of four complete samples of radio-loud AGN (3CRR, 2Jy, 6CE and 7CE) using near- and mid-IR data taken by the Wide-Field Infrared Survey Explorer (WISE). The combined sample consists of 79 quasars and 273 radio…

宇宙学与河外天体物理 · 物理学 2013-11-25 G. Gurkan , M. J. Hardcastle , M. J. Jarvis

The existence of a correlation between observed radio spectral index (alpha) and redshift (z) has long been used as a method for locating high-z radio galaxies. We use 9 highly spectroscopically complete radio samples, selected at different…

宇宙学与河外天体物理 · 物理学 2015-06-03 L. M. Ker , P. N. Best , E. E. Rigby , H. J. A. Röttgering , M. A. Gendre

Spectroscopic observations of a sample of 42 flat-spectrum radio sources from the Cosmic Lens All-Sky Survey (CLASS) have yielded a mean redshift of $<z> = 1.27$ with an RMS spread of 0.95, at a completeness level of 64%. The sample…

天体物理学 · 物理学 2009-10-31 D. R. Marlow , D. Rusin , N. Jackson , P. N. Wilkinson , I. W. A. Browne , L. Koopmans

The upcoming WEAVE-QSO survey will target a high density of quasars over a large area, enabling the reconstruction of the 3D density field through Lyman-$\alpha$ tomography over unprecedented volumes smoothed on intermediate scales…

{Abridged} A combination of spectroscopy and broadband photometric redshifts has been used to find the complete redshift distribution of the Hercules sample of millijansky radio sources. These data have been used to examine the evolution of…

天体物理学 · 物理学 2009-11-06 I. Waddington , J. S. Dunlop , J. A. Peacock , R. A. Windhorst

We present an overview and the first data release of ZFIRE, a spectroscopic redshift survey of star-forming galaxies that utilizes the MOSFIRE instrument on Keck-I to study galaxy properties in rich environments at $1.5<z<2.5$. ZFIRE…

We report on the results of an optical spectroscopic survey at high Galactic latitude (b\geq30{\deg}) of a sample of WISE-selected targets, grouped by WISE W1 ({\lambda}_eff = 3.4 \mum) flux, which we use to characterize the sources WISE…

This paper describes the Wide Field Spectrograph (WiFeS) under construction at the Research School of Astronomy and Astrophysics (RSAA) of the Australian National University (ANU) for the ANU 2.3m telescope at the Siding Spring Observatory.…

天体物理学 · 物理学 2019-08-19 Michael Dopita , John Hart , Peter McGregor , Patrick Oates , Gabe Bloxham , Damien Jones

LOFAR (the Low Frequency Array), a distributed digital radio telescope with stations in the Netherlands, Germany, France, Sweden, and the United Kingdom, is designed to enable full-sky monitoring of transient radio sources. These…

The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines the challenges and gains expected in gravitational wave searches at…

We present parameterized broadband spectral models valid at frequencies between 30-300 MHz for six bright radio sources selected from the 3C survey, spread in Right Ascension from 0-24 hours. For each source, data from the literature are…

天体物理仪器与方法 · 物理学 2015-06-04 Anna M. M. Scaife , George H. Heald

The WiggleZ Dark Energy Survey is a survey of 240,000 emission line galaxies in the distant universe, measured with the AAOmega spectrograph on the 3.9-m Anglo-Australian Telescope (AAT). The target galaxies are selected using ultraviolet…

The study of transient and variable low-frequency radio sources is a key goal for LOFAR, with an extremely broad science case ranging from relativistic jets sources to pulsars, exoplanets, radio bursts at cosmological distances, the…

天体物理学 · 物理学 2010-12-13 Rob Fender , Ralph Wijers , Ben Stappers , the LOFAR Transients Key Science Project

The next generation of radio surveys is going to be transformative for cosmology and other aspects of our understanding of astrophysics. Realistic simulations of radio observations are essential for the design and planning of radio surveys.…

天体物理仪器与方法 · 物理学 2025-07-30 Tobias Vičánek Martínez , Henrik W. Edler , Marcus Brüggen

Past millimeter-wave galaxy surveys have primarily probed the brightest starburst galaxies only and suffered heavily from confusion. The interpretation of existing surveys has also been hindered by the lack of reliable redshift indicators…

天体物理仪器与方法 · 物理学 2025-12-05 Attila Kovács , Garrett K. Keating , Thomas R. Greve , Timothy Norton

We have obtained complete redshift information for a sample of 442 radio-loud quasars with flux densities S(11cm) >= 0.25Jy. These come from a completely-identified sample of 878 flat-spectrum radio sources, so there is no optical magnitude…

天体物理学 · 物理学 2007-05-23 P. A. Shaver , I. M. Hook , C. A. Jackson , J. V. Wall , K. I. Kellermann

We present preliminary results from the 2-degree Field (2dF) QSO Redshift Survey currently under way at the Anglo-Australian Telescope. This survey aims to determine the redshifts of >25000 QSOs over a redshift range of 0.3<z<3.0 with the…

天体物理学 · 物理学 2007-05-23 S. M. Croom , T. Shanks , B. J. Boyle , R. J. Smith , L. Miller , N. S. Loaring

With the goal of identifying high redshift radio galaxies with FRI classification, here are presented high resolution, wide-field radio observations, near infra-red and optical imaging and multi-object spectroscopy of two fields of the…

天体物理学 · 物理学 2009-11-13 E. E. Rigby , I. A. Snellen , P. N. Best