Publications
228 results found
Bridle S, Heavens A, 2004, Redshift surveys, ASTRONOMY & GEOPHYSICS, Vol: 45, Pages: 35-36, ISSN: 1366-8781
Heymans C, Brown M, Heavens A, et al., 2004, Weak lensing with COMBO-17: estimation and removal of intrinsic alignments, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 347, Pages: 895-908, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 114
Viel M, Matarrese S, Heavens A, et al., 2004, The bispectrum of the Lyman α forest at <i>z</i> ∼ 2-2.4 from a large sample of UVES QSO absorption spectra (LUQAS), MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 347, Pages: L26-L30, ISSN: 0035-8711
- Author Web Link
- Open Access Link
- Cite
- Citations: 33
Heavens A, Santos M, Ferreira P, 2003, The bispectrum of MAXIMA, 2nd CMBNet Workshop on Science and Parameter Extraction, Publisher: ELSEVIER SCI LTD, Pages: 815-820, ISSN: 1387-6473
- Author Web Link
- Cite
- Citations: 2
Heymans C, Heavens A, 2003, Reducing and constraining the intrinsic galaxy alignment contamination to weak lensing measurements
We present a method for removal of the contaminating effects of intrinsicgalaxy alignments, in measurements of cosmic shear from multi-colour weaklensing surveys. The method down-weights pairs which are likely to be close inthree dimensions, based on spectroscopic or photometric redshifts. Results aredramatic: the intrinsic contamination of the low-redshift Sloan photometricredshift survey could be 80 times the lensing signal, but this can be almostcompletely removed, leaving random shot noise errors of the order of 10%.Intrinsic galaxy alignments, although an annoying contaminant for cosmic shearstudies, are interesting in their own right, and we therefore present a newobservational constraint for their amplitude from the aperture mass B-mode inthe Red-Sequence Cluster Survey. The small measured B-mode rules out thepublished intrinsic alignment models from numerical simulations, which assumeno evolution in galaxy clustering.
Panter B, Heavens AF, Jimenez R, 2003, Star formation and metallicity history of the SDSS galaxy survey: unlocking the fossil record, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 343, Pages: 1145-1154, ISSN: 0035-8711
- Author Web Link
- Open Access Link
- Cite
- Citations: 103
Heavens A, 2003, 3D weak lensing, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 343, Pages: 1327-1334, ISSN: 0035-8711
- Author Web Link
- Open Access Link
- Cite
- Citations: 139
Santos MG, Heavens A, Balbi A, et al., 2003, Multiple methods for estimating the bispectrum of the cosmic microwave background with application to the MAXIMA data, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 341, Pages: 623-643, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 45
Nolan LA, Dunlop JS, Jimenez R, et al., 2003, F stars, metallicity and the ages of red galaxies at <i>z</i> > 1, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 341, Pages: 464-476, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 65
Heymans C, Heavens A, 2003, Weak gravitational lensing: reducing the contamination by intrinsic alignments, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 339, Pages: 711-720, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 114
Verde L, Heavens AF, Percival WJ, et al., 2003, The bias of galaxies and the density of the universe from the 2dF galaxy redshift survey
By studying the bispectrum of the galaxy distribution in the 2dF galaxyredhsift survey (2dFGRS), we have shown that 2dFGRS galaxies are unbiasedtracers of the mass distribution. This allows us the break the degeneracyintrinsic to power spectrum studies, between the matter density parameterOmega_m and the bias parameter b, and to obtain an accurate measurement ofOmega_m: Omega_{m,z_{eff}}=0.27 \pm 0.06, a measurement obtained from the2dFGRS alone, independently from other data sets. This result has to beinterpreted as Omega_m at the effective redshift of the survey z_{eff}=0.17.Extrapolated at z=0 we obtain Omega_m=0.2 \pm 0.06 for the LCDM model. Thisconstraint on the matter density parameter when combined with cosmic microwavebackground constraints on the flatness of the Universe, show firm evidence thatthe Universe is dominated by a vacuum energy component.
Verde L, Heavens AF, Percival WJ, et al., 2002, The 2dF Galaxy Redshift Survey: the bias of galaxies and the density of the Universe, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 335, Pages: 432-440, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 511
Gupta S, Berera A, Heavens AF, et al., 2002, Non-Gaussian signatures in the cosmic background radiation from warm inflation, PHYSICAL REVIEW D, Vol: 66, ISSN: 2470-0010
- Author Web Link
- Cite
- Citations: 83
Gupta S, Heavens AF, 2002, Fast parameter estimation from the cosmic microwave background power spectrum, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 334, Pages: 167-172, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 13
Mann RG, Oliver S, Carballo R, et al., 2002, Observations of the <i>Hubble deep field</i> south with the <i>Infrared space observatory</i> -: II.: Associations and star formation rates, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 332, Pages: 549-574, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 38
Heavens AF, 2002, INTRINSIC GALAXY ALIGNMENTS AND WEAK GRAVITATIONAL LENSING, Publisher: WORLD SCIENTIFIC
Minty EM, Heavens AF, Hawkins MRS, 2002, Testing dark matter with high-redshift supernovae, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 330, Pages: 378-382, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 13
Reichardt C, Jimenez R, Heavens AF, 2001, Recovering physical parameters from galaxy spectra using MOPED, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 327, Pages: 849-867, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 55
Taylor AN, Ballinger WE, Heavens AF, et al., 2001, Redshift-space distortions in the PSC<i>z</i> galaxy catalogue, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 327, Pages: 689-696, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 27
Heavens AF, Gupta S, 2001, Full-sky correlations of peaks in the microwave background, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 324, Pages: 960-968, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 22
Verde L, Heavens AF, 2001, On the trispectrum as a Gaussian test for cosmology, ASTROPHYSICAL JOURNAL, Vol: 553, Pages: 14-24, ISSN: 0004-637X
- Author Web Link
- Cite
- Citations: 37
Gupta S, Heavens AF, 2001, Peaks in the CMB - Sensitively testing the Gaussian hypothesis, International Conference on Cosmology and Particle Physics (CAPP 2000), Publisher: AMER INST PHYSICS, Pages: 337-340, ISSN: 0094-243X
- Author Web Link
- Cite
- Citations: 2
Berera A, Heavens AF, 2000, Detection limits for super-Hubble suppression of causal fluctuations, PHYSICAL REVIEW D, Vol: 62, ISSN: 2470-0010
- Author Web Link
- Cite
- Citations: 9
Heavens A, Refregier A, Heymans C, 2000, Intrinsic correlation of galaxy shapes: implications for weak lensing measurements, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 319, Pages: 649-656, ISSN: 0035-8711
- Author Web Link
- Open Access Link
- Cite
- Citations: 250
Verde L, Heavens AF, Matarrese S, 2000, Projected bispectrum in spherical harmonics and its application to angular galaxy catalogues, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 318, Pages: 584-598, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 26
Heavens AF, Jimenez R, Lahav O, 2000, Massive lossless data compression and multiple parameter estimation from galaxy spectra, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 317, Pages: 965-972, ISSN: 0035-8711
- Author Web Link
- Open Access Link
- Cite
- Citations: 183
Taylor AN, Ballinger WE, Heavens AF, et al., 2000, Application of Data Compression Methods to the Redshift-space distortions of the PSCz galaxy catalogue
We apply a spherical harmonic analysis to the Point Source Redshift Survey(PSCz), to compute the real-space galaxy power spectrum and the degree ofredshift distortion caused by peculiar velocities. We employ new parametereigenvector and hierarchical data compression techniques, allowing a muchlarger number of harmonic modes to be included, and correspondingly smallererror bars. Using 4644 harmonic modes, compressed to 2278, we find that theIRAS redshift-space distortion parameter is $\beta = 0.39 \pm 0.12$ and theamplitude of galaxy clustering on a scale of $k=0.1 \Mpch$ is $\Delta_{\rmgal}(0.1)=0.42 \pm 0.02$. Combining these we find the amplitude of massperturbations is $\Delta_m(0.1)=(0.16\pm0.04) \Omega_m^{-0.6}$. A preliminarymodel fitting analysis combining the PSCz amplitudes with the CMB and abundanceof clusters yields the cosmological matter density parameter $\Omega_m=0.16\pm0.03$, the amplitude of primordial perturbations $Q=(8.4\pm 3.8) \times10^{-5}$, and the IRAS bias parameter $b=0.84\pm 0.28$.
Ballinger WE, Taylor AN, Heavens AF, et al., 2000, Redshift Distortions and Clustering in the PSCz Survey
We have constrained the redshift-distortion parameter $\beta \equiv\Omega^{0.6}/b$ and the real-space power spectrum of the IRAS PSCz survey usinga spherical-harmonic redshift-distortion analysis combined with a datacompression method which is designed to deal with correlated parameters. Ourlatest result, $\beta=0.4 \pm 0.1$, strongly rules out $\beta=1$.
Verde L, Wang LM, Heavens AF, et al., 2000, Large-scale structure, the cosmic microwave background and primordial non-Gaussianity, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 313, Pages: 141-147, ISSN: 0035-8711
- Author Web Link
- Cite
- Citations: 309
Saunders W, Branchini E, Teodoro L, et al., 2000, Density and velocity fields from the PSCz survey, COSMIC FLOWS 1999: TOWARDS AN UNDERSTANDING OF LARGE-SCALE STRUCTURE, Vol: 201, Pages: 228-236
- Author Web Link
- Cite
- Citations: 2
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.