Beecroft Institute for Particle Astrophysics and Cosmology

Research group

Research theme

Sub department

About

The 2dF QSO Redshift Survey - V. The 10k catalogue

Monthly Notices of the Royal Astronomical Society 322:4 (2001)

Authors:

SM Croom, RJ Smith, BJ Boyle, T Shanks, NS Loaring, L Miller, IJ Lewis

Abstract:

We present a catalogue comprising over 10 000 QSOs covering an effective area of 289.6 deg2, based on spectroscopic observations with the 2-degree Field (2dF) instrument at the Anglo-Australian Telescope. This catalogue forms the first release of the 2dF QSO Redshift Survey. QSO candidates with 18.25 < bJ < 20.85 were obtained from a single homogeneous colour-selected catalogue based on APM measurements of UK Schmidt photographic material. The final catalogue will contain approximately 25 000 QSOs and will be released to the public at the end of 2002, one year after the observational phase is concluded.
More details from the publisher
More details
Details from ArXiV

Cosmology from MAXIMA-1, BOOMERANG, and COBE DMR cosmic microwave background observations

Physical Review Letters 86:16 (2001) 3475-3479

Authors:

AH Jaffe, PAR Ade, A Balbi, JJ Bock, JR Bond, J Borrill, A Boscaleri, K Coble, BP Crill, P De Bernardis, P Farese, PG Ferreira, K Ganga, M Giacometti, S Hanany, E Hivon, VV Hristov, A Iacoangeli, AE Lange, AT Lee, L Martinis, S Masi, PD Mauskopf, A Melchiorri, T Montroy, CB Netterfield, S Oh, E Pascale, F Piacentini, D Pogosyan, S Prunet, B Rabii, S Rao, PL Richards, G Romeo, JE Ruhl, F Scaramuzzi, D Sforna, GF Smoot, R Stompor, CD Winant, JHP Wu

Abstract:

To obtain further estimates of several cosmological parameters, the recent BOOMERANG-98 (B98) and MAXIMA-1 cosmic microwave background (CMB) anisotropy data, as well as COBE DMR, were analyzed. The resulting data support the chief predictions of the inflation paradigm, that the geometry of the Universe is flat, and that the initial density perturbations are scale invariant, and with the corollary that the density of mass energy in the Universe is dominated by a form other than ordinary matter.
More details from the publisher
More details
More details

Isotropy and Stability of the Brane

ArXiv hep-ph/0103112 (2001)

Authors:

MG Santos, F Vernizzi, PG Ferreira

Abstract:

We reexamine Wald's no-hair theorem for global anisotropy in the brane world scenarios. We derive a set of sufficient conditions which must be satisfied by the brane matter and bulk metric so that a homogeneous and anisotropic brane asymptotically evolves to a de Sitter spacetime in the presence of a positive cosmological constant on the brane. We discuss the violations of these sufficient conditions and we show that a negative nonlocal energy density or the presence of strong anisotropic stress (i.e., a magnetic field) may lead the brane to collapse. We discuss the generality of these conditions.
Details from ArXiV
More details from the publisher

First Results from the 2dF QSO redshift survey

ArXiv astro-ph/0103064 (2001)

Authors:

BJ Boyle, SM Croom, RJ Smith, T Shanks, PJ Outram, F Hoyle, L Miller, NS Loaring

Abstract:

We present some initial results from the 2dF QSO redshift survey. The aim of the survey is to produce an optically-selected catalogue of 25000 QSOs over the redshift range 0
Details from ArXiV

The 2dF QSO Redshift Survey - 10K@2K!

ArXiv astro-ph/0103056 (2001)

Authors:

T Shanks, BJ Boyle, SM Croom, F Hoyle, N Loaring, L Miller, PJ Outram, RJ Smith

Abstract:

With ~10000 QSO redshifts, the 2dF QSO Redshift Survey (2QZ) is already the biggest individual QSO survey. The aim for the survey is to have ~25000 QSO redshifts, providing an order of magnitude increase in QSO clustering statistics. We first describe the observational parameters of the 2dF QSO survey. We then describe several highlights of the survey so far; we present new estimates of the QSO luminosity function and the QSO correlation function. We also present the first estimate of the QSO power spectrum from the 2QZ catalogue, probing the form of the fluctuation power-spectrum out to the \~1000h-1Mpc scales only previously probed by COBE. We find a power spectrum which is steeper than the prediction of standard CDM and more consistent with the prediction of Lambda-CDM. The best-fit value for the power spectrum shape parameter for a range of cosmologies is Gamma=0.1+-0.1. Finally, we discuss how the complete QSO survey will be able to constrain the value of Omega_Lambda by combining results from the evolution of QSO clustering and from a geometric test of clustering isotropy.
Details from ArXiV
More details from the publisher