scholarly journals Spectral Characteristics of the 2dFGRS–NVSS Galaxies

2000 ◽  
Vol 17 (3) ◽  
pp. 234-240 ◽  
Author(s):  
C. A. Jackson ◽  
D. M. Londish
Keyword(s):  
Spectral Characteristics ◽  
Line Ratio ◽  
Emission Lines ◽  
Sky Survey ◽  
Show Evidence ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Narrow Emission

AbstractWe have analysed the 2dF spectra of a sample of galaxies common to the 2dF Galaxy Redshift Survey (2dFGRS, Colless 1999) and the NRAO VLA Sky Survey (NVSS, Condon et al. 1998). Our sample comprises 88 galaxies selected by Sadler et al. (1999) from 30 2dFGRS fields observed in 1998. In this paper we discuss how this and future, much larger, samples of 2dFGRS–NVSS galaxies can be interpreted via analysis of those galaxies with strong narrow emission lines. Using diagnostic line ratio measurements, we confirm the majority of the eyeball classifications of Sadler et al. (1999), although many galaxies show evidence of being ‘composite’ galaxies—mixtures of AGN plus starburst components.

scholarly journals Radio Sources in the 2dF Galaxy Redshift Survey I. Radio Source Populations

1999 ◽  
Vol 16 (3) ◽  
pp. 247-256 ◽  
Author(s):  
Elaine M. Sadler ◽  
V. J. McIntyre ◽  
C. A. Jackson ◽  
R. D. Cannon
Keyword(s):  
Radio Galaxy ◽  
Radio Continuum ◽  
Radio Sources ◽  
Star Forming ◽  
Sky Survey ◽  
Homogeneous Set ◽  
First Results ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Source Populations

AbstractWe present the first results from a study of the radio continuum properties of galaxies in the 2dF Galaxy Redshift Survey, (2dFGRS) based on thirty 2dF fields covering a total area of about 100 deg2. About 1·5% of galaxies with bJ < 19·4 mag. are detected as radio continuum sources in the NRAO VLA Sky Survey (NVSS). Of these, roughly 40% are star-forming galaxies and 60% are active galaxies (mostly low-power radio galaxies and a few Seyferts). The combination of 2dFGRS and NVSS will eventually yield a homogeneous set of around 4000 radio-galaxy spectra, which will be a powerful tool for studying the distribution and evolution of both AGN and starburst galaxies out to z ∼ 0·3.

Mapping the Local and Distant Universe with SUMSS

2005 ◽  
Vol 216 ◽  
pp. 211-218
Author(s):  
Elaine M. Sadler ◽  
Richard W. Hunstead ◽  
Thomas Mauch ◽  
Duncan Campbell-Wilson ◽  
Carole A. Jackson ◽  
...  
Keyword(s):  
Radio Source ◽  
Radio Galaxies ◽  
Radio Continuum ◽  
Space Distribution ◽  
Local Universe ◽  
Star Forming ◽  
Sky Survey ◽  
First Results ◽  
Redshift Survey ◽  
Galaxy Redshift

The Sydney University Molonglo Sky Survey (SUMSS) is a radio continuum imaging survey of the southern sky at 843 MHz, with similar sensitivity and resolution to the northern NRAO VLA Sky Survey (NVSS). We have combined radio data from SUMSS and NVSS with optical spectra from the 2dF Galaxy Redshift Survey and 6dF Galaxy Survey to study the space distribution and properties of both AGN and star-forming galaxies in the local universe (redshift range 0 < z < 0.3). We also discuss new results on radio-source clustering in the more distant universe (z ∼ 1) and present the first results from a search for the most distant (z > 3) southern radio galaxies.

scholarly journals Evidence of AGN-driven Outflows in Young Radio Quasars Selected from the Wide-field Infrared Survey Explorer

2013 ◽  
Vol 9 (S304) ◽  
pp. 347-348
Author(s):  
Minjin Kim ◽  
Luis C. Ho ◽  
Carol J. Lonsdale ◽  
Mark Lacy ◽  
Andrew W. Blain ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Near Infrared ◽  
Galactic Nuclei ◽  
Emission Lines ◽  
Wide Field ◽  
Near Infrared Spectra ◽  
Sky Survey ◽  
Line Widths ◽  
Infrared Survey ◽  
Narrow Emission

AbstractWe present near-infrared spectra of young radio quasars selected by cross-correlating the Wide-field Infrared Survey Explorer (WISE) all-sky survey catalog with the radio catalog [Faint Images of the Radio Sky at Twenty cm (FIRST) and NRAO VLA Sky Survey (NVSS)]. The objects have typical redshifts of z ≈ 2 and [O III] luminosities of 107 erg s−1 comparable to those of luminous quasars. The observed flux ratios of narrow emission lines indicate that these objects appear to be powered by active galactic nuclei. The [O III] line is broad, with full width at half maximum ~1300 to 2100 km s−1, significantly larger than that of ordinary quasars. These large line widths might be explained by jet-induced outflows.

Two Degree Field Galaxy Redshift Survey and Sloan Digital Sky Survey Galaxy Group Density Profiles

2005 ◽  
Vol 629 (1) ◽  
pp. 158-171 ◽  
Author(s):  
Eugenia Diaz ◽  
Ariel Zandivarez ◽  
Manuel E. Merchan ◽  
Hernan Muriel
Keyword(s):  
Sloan Digital Sky Survey ◽  
Density Profiles ◽  
Sky Survey ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Group Density ◽  
Field Galaxy

scholarly journals Using the 6dF Galaxy Redshift Survey to Detect Gravitationally-lensed Quasars

2001 ◽  
Vol 18 (2) ◽  
pp. 195-197 ◽  
Author(s):  
Daniel J. Mortlock ◽  
Michael J. Drinkwater
Keyword(s):  
United Kingdom ◽  
Infrared Spectroscopy ◽  
Near Infrared ◽  
Emission Lines ◽  
Schmidt Telescope ◽  
Galaxy Surveys ◽  
The United Kingdom ◽  
Redshift Survey ◽  
Galaxy Redshift

AbstractIt is possible to detect gravitationally-lensed quasars spectroscopically if the spectra obtained during galaxy surveys are searched for the presence of quasar emission lines. The up-coming 6 degree Field (6dF) redshift survey on the United Kingdom Schmidt Telescope will involve obtaining ~105 spectra of near-infrared selected galaxies to a magnitude limit of K = 13. Applying previously developed techniques implies that at least one lens should be discovered in the 6dF survey, but that as many as ten could be found if quasars typically have BJ – K ~ 8. In this model there could be up to fifty lensed quasars in the sample, but most of them could only be detected by infrared spectroscopy.

CONSTRAINT ON THE KINEMATICAL AND DYNAMICAL MODEL FROM THE LATEST OBSERVATIONAL DATA

2010 ◽  
Vol 25 (36) ◽  
pp. 3033-3046 ◽  
Author(s):  
JIANBO LU ◽  
YABO WU ◽  
LIXIN XU
Keyword(s):  
Observational Data ◽  
Acoustic Oscillation ◽  
Sloan Digital Sky Survey ◽  
Dynamical Model ◽  
Sky Survey ◽  
Type Ia ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Ia Supernovae ◽  
Field Galaxy

The kinematical model j(z) = j0and dynamical model wde(z) = w0, are constrained from the latest observational data: Union2 data including 557 type Ia supernovae (SNIa), 15 observational Hubble data (OHD), baryon acoustic oscillation (BAO) data from Sloan Digital Sky Survey (SDSS) and Two-degree Field Galaxy Redshift Survey (2dFGRS) and CMB data from seven-year WMAP. We get the current values of deceleration parameter q0, jerk parameter j0, dimensionless matter density Ωm, equation of state for dark energy w0and transition redshift zT. Furthermore, it is shown that for both kinematical and dynamical models, the constraint results support for the cosmic concordance model, ΛCDM.

scholarly journals An Obscured Galaxy Redshift Survey with FLAIR

1997 ◽  
Vol 14 (1) ◽  
pp. 126-126 ◽  
Author(s):  
K. Wakamatsu ◽  
M. Malkan ◽  
Q. A. Parker ◽  
H. Karoji
Keyword(s):  
Large Scale ◽  
Wall Structure ◽  
Galactic Centre ◽  
Large Scale Structures ◽  
Sky Survey ◽  
Centre Region ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Scale Structures ◽  
Zone Of Avoidance

A problem for studies of large scale structures in nearby space (cz < 10,000 km s-1) is the presence of the Zone of Avoidance which is so large and wide on the sky that potentially important clusters and voids remain undetected. A prime example was the Ophiuchus cluster discovered by Wakamatsu and Malkan (1981) as a heavily obscured cD cluster close to the Galactic centre region (l = 0·5°, b = +9·5°). It is the second brightest X-ray cluster after Perseus. A hidden galaxy survey was performed by visually searching ESO/SERC Sky Survey (R and J) copy films of the region centred at l = 355°, b = +10° finding more than 4000 galaxies in six fields. Several irregular clusters adjacent to Ophiuchus were found forming a supercluster which may be connected to the Hercules supercluster by a wall structure parallel to the local supergalactic plane (Wakamatsu et al. 1994). In front of this supercluster, an 'Ophiuchus Void' is suggested (cz = 4,500 km s-1). The Ophiuchus supercluster at cz = 8,500 km s-1 is similar to the Hercules supercluster (cz = 11,000 km s-1), and extends north toward the latter supercluster.

scholarly journals The Sydney University Molonglo Sky Survey (SUMSS) and Optical Redshift Surveys of the Southern Sky

2002 ◽  
Vol 199 ◽  
pp. 11-20
Author(s):  
Elaine M. Sadler ◽  
R.W. Hunstead
Keyword(s):  
Southern Hemisphere ◽  
Noise Level ◽  
Radio Data ◽  
Redshift Surveys ◽  
Radio Imaging ◽  
Sky Survey ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
New Generation

The Sydney University Molonglo Sky Survey (SUMSS) is a radio imaging survey at 843 MHz of the whole sky south of declination −30°. With a resolution of 43″ × 43″ cosec |δ| and an rms noise level of ∼ 1 mJy/beam, SUMSS has similar sensitivity and resolution to the northern NRAO VLA Sky Survey (NVSS). Here, we present some results from the first two years of SUMSS and also show what can be done by combining radio data from SUMSS and NVSS with the new generation of large optical redshift surveys (including the 2dF Galaxy Redshift Survey and 6dF Galaxy Survey) now becoming available in the southern hemisphere.

scholarly journals Measuring the Baryon Acoustic Oscillation scale using the Sloan Digital Sky Survey and 2dF Galaxy Redshift Survey

2007 ◽  
Vol 381 (3) ◽  
pp. 1053-1066 ◽  
Author(s):  
Will J. Percival ◽  
Shaun Cole ◽  
Daniel J. Eisenstein ◽  
Robert C. Nichol ◽  
John A. Peacock ◽  
...  
Keyword(s):  
Acoustic Oscillation ◽  
Sloan Digital Sky Survey ◽  
Baryon Acoustic Oscillation ◽  
Sky Survey ◽  
Redshift Survey ◽  
Galaxy Redshift
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