Cosmic shear is a powerful method to constrain cosmology, provided that any systematic effects are under control. The intrinsic alignment of galaxies is expected to severely bias parameter estimates...
Limitations of model fitting methods for lensing shear estimation (2009)
Gravitational lensing shear has the potential to be the most powerful tool for constraining the nature of dark energy. However, accurate measurement of galaxy shear is crucial and has been shown to...
Shear-Selected Clusters From the Deep Lens Survey III: Masses from Weak Lensing (2009)
Abate, Alexandra, Wittman, D., Margoniner, V. E., Bridle, S. L., Gee, Perry, Tyson, J. Anthony, ...
We present weak lensing mass estimates of seven shear-selected galaxy cluster candidates from the Deep Lens Survey. The clusters were previously identified as mass peaks in convergence maps of 8.6...
Gravitational Flexion by Elliptical Dark Matter Haloes (2009)
We present equations for the gravitational lensing flexion expected for an elliptical lens mass distribution. These can be reduced to one-dimensional finite integrals, thus saving significant...
Handbook for the GREAT08 Challenge: An image analysis competition for cosmological lensing (2008)
Bridle, S. L., Shawe-Taylor, John
The GRavitational lEnsing Accuracy Testing 2008 (GREAT08) Challenge focuses on a problem that is of crucial importance for future observations in cosmology. The shapes of distant galaxies can be used...
PSF calibration requirements for dark energy from cosmic shear (2007)
Paulin-Henriksson, S., Amara, A., Voigt, L., Refregier, A., Bridle, S. L.
The control of systematic effects when measuring galaxy shapes is one of the main challenges for cosmic shear analyses. In this context, we study the fundamental limitations on shear accuracy due to...
S. L. Bridle, M. P. Hobson, A. N. Lasenby, O. Lahav, G. Rocha
Observations of large scale structure (LSS) and the Cosmic Microwave Background (CMB) each place separate constraints on the values of cosmological parameters. We calculate a joint likelihood based...
Galaxy Evolution and Cosmology with the Square Kilometre Array (2004)
Rawlings, S., Abdalla, F. B., Bridle, S. L., Blake, C. A., Baugh, C. M., Greenhill, L. J., ...
The present-day Universe is seemingly dominated by dark energy and dark matter, but mapping the normal (baryonic) content remains vital for both astrophysics - understanding how galaxies form - and...
Blake, C. A., Abdalla, F. B., Bridle, S. L., Rawlings, S.
We argue that the Square Kilometer Array has the potential to make both redshift (HI) surveys and radio continuum surveys that will revolutionize cosmological studies, provided that it has sufficient...
Galaxy evolution, cosmology and dark energy with the Square Kilometer Array (2004)
Rawlings, S., Abdalla, F. B., Bridle, S. L., Blake, C. A., Baugh, C. M., Greenhill, L. J., ...
The present-day Universe is seemingly dominated by dark energy and dark matter, but mapping the normal (baryonic) content remains vital for both astrophysics – understanding how galaxies form -...
Blake, C. A., Abdalla, F. B., Bridle, S. L., Rawlings, S.
We argue that the Square Kilometer Array has the potential to make both redshift (HI) surveys and radio continuum surveys that will revolutionize cosmological studies, provided that it has sufficient...
Galaxy evolution, cosmology and dark energy with the Square Kilometer Array (2004)
Rawlings, S., Abdalla, F. B., Bridle, S. L., Blake, C. A., Baugh, C. M., Greenhill, L. J., ...
The present-day Universe is seemingly dominated by dark energy and dark matter, but mapping the normal (baryonic) content remains vital for both astrophysics – understanding how galaxies form -...
Reconstructing the primordial power spectrum (2003)
Bridle, S.L., Lewis, A.M., Weller, J., Efstathiou, G.P.
We reconstruct the shape of the primordial power spectrum from the latest cosmic microwave background data, including the new results from the Wilkinson Microwave Anisotropy Probe (WMAP), and...
A preference for a non-zero neutrino mass from cosmological data (2003)
Allen, S. W., Schmidt, R. W., Bridle, S. L.
We present results from the analysis of cosmic microwave background (CMB), large scale structure (galaxy redshift survey) and X-ray galaxy cluster (baryon fraction and X-ray luminosity function)...
Revealing the Nature of Dark Energy Using Bayesian Evidence (2003)
Saini, T. D., Weller, J., Bridle, S. L.
We apply the Bayesian concept of `evidence' to reveal systematically the nature of dark energy from present and future supernova luminosity distance measurements. We express the unknown dark energy...
Reconstructing the primordial power spectrum (2003)
Bridle, S. L., Lewis, A. M., Weller, J., Efstathiou, G.
We reconstruct the shape of the primordial power spectrum from the latest cosmic microwave background data, including the new results from the Wilkinson Microwave Anisotropy Probe (WMAP), and large...
A new upper limit on the total neutrino mass from the 2dF galaxy redshift survey (2002)
Elgaroy, O., Lahav, O., Percival, W.J., Peacock, J.A., Madgwick, D.S., Bridle, S.L., ...
We constrain fν≡Ων/Ωm, the fractional contribution of neutrinos to the total mass density in the Universe, by comparing the power spectrum of fluctuations derived from the 2 Degree Field Galaxy...
Lahav, O., Bridle, S.L., Percival, W.J., Peacock, J.A., Efstathiou, G., Baugh, C.M., ...
We compare the amplitudes of fluctuations probed by the 2dF Galaxy Redshift Survey (2dFGRS) and by the latest measurements of the cosmic microwave background (CMB) anisotropies. By combining the...
A new upper limit on the total neutrino mass from the 2dF Galaxy Redshift Survey (2002)
Elgaroy, O., Lahav, O., Percival, W. J., Peacock, J. A., Madgwick, D. S., Bridle, S. L., ...
We constrain f_nu = Omega_nu / Omega_m, the fractional contribution of neutrinos to the total mass density in the Universe, by comparing the power spectrum of fluctuations derived from the 2dF Galaxy...
Combining cosmological datasets: hyperparameters and Bayesian evidence (2002)
Hobson, M. P., Bridle, S. L., Lahav, O.
A method is presented for performing joint analyses of cosmological datasets, in which the weight assigned to each dataset is determined directly by it own statistical properties. The weights are...
New upper limit on the total neutrino mass from the 2 degree field galaxy redshift survey (2002)
Elgary, O., Lahav, O., Percival, W. J., Peacock, J. A., Madgwick, D. S., Bridle, S. L., ...
The shape of the 2 Degree Field Galaxy Redshift Survey (2dFGRS) power spectrum was analyzed to obtain an upper bound on the fractional contribution of massive neutrinos to the total mass density, fv....
New upper limit on the total neutrino mass from the 2 degree field galaxy redshift survey (2002)
Elgary, O., Lahav, O., Percival, W. J., Peacock, J. A., Madgwick, D. S., Bridle, S. L., ...
The shape of the 2 Degree Field Galaxy Redshift Survey (2dFGRS) power spectrum was analyzed to obtain an upper bound on the fractional contribution of massive neutrinos to the total mass density, fv....
Maximum-entropy weak lens reconstruction: improved methods and application to data (2001)
Marshall, P. J., Hobson, M. P., Gull, S. F., Bridle, S. L.
We develop the maximum-entropy weak shear mass reconstruction method presented in earlier papers by taking each background galaxy image shape as an independent estimator of the reduced shear field...
Analytic marginalization over CMB calibration and beam uncertainty (2001)
Bridle, S. L., Crittenden, R., Melchiorri, A., Hobson, M. P., Kneissl, R., Lasenby, A. N.
With the increased accuracy and angular scale coverage of the recent CMB experiments it has become important to include calibration and beam uncertainties when estimating cosmological parameters....
We compare and combine likelihood functions of the cosmological parameters Omega_m, h and sigma_8 from the CMB, type Ia supernovae and from probes of large scale structure. We include the recent...
Maximum-entropy reconstruction of gravitational lenses using shear and/or magnification data (2000)
Bridle, S. L., Hobson, M. P., Saunders, Richard, Lasenby, A. N.
We demonstrate that the maximum-entropy method for gravitational lens reconstruction presented in Bridle et al. (1998) may be applied even when only shear \emph{or} magnification information is...
Cosmological Parameters from Velocities, CMB and Supernovae (2000)
Bridle, S. L., Zehavi, I., Dekel, A., Lahav, O., Hobson, M. P., Lasenby, A. N.
We compare and combine likelihood functions of the cosmological parameters Omega_m, h and sigma_8, from peculiar velocities, CMB and type Ia supernovae. These three data sets directly probe the mass...
Lahav, O., Bridle, S. L., Hobson, M. P., Lasenby, A. N., Sodr'e Jr., L.
Recently several studies have jointly analysed data from different cosmological probes with the motivation of estimating cosmological parameters. Here we generalise this procedure to take into...
Cosmological parameters from cluster abundances, CMB and IRAS (1999)
Bridle, S. L., Eke, V. R., Lahav, O., Lasenby, A. N., Hobson, M. P., Cole, S., ...
We combine information on cosmological parameters from cluster abundances, CMB primordial anisotropies and the IRAS 1.2 Jy galaxy redshift survey. We take as free parameters the present values of the...
Combining Supernovae and LSS Information with the CMB (1999)
Lasenby, A. N., Bridle, S. L., Hobson, M. P.
Observations of the Cosmic Microwave Background (CMB), large scale structure (LSS) and standard candles such as Type 1a Supernovae (SN) each place different constraints on the values of cosmological...
Bridle, S. L., Hobson, M. P., Lasenby, A. N., Saunders, Richard
The maximum-entropy method is applied to the problem of reconstructing the projected mass density of a galaxy cluster using its gravitational lensing effects on background galaxies. We demonstrate...
Joint estimation of cosmological parameters from CMB and IRAS data (1998)
Webster, Matthew, Bridle, S. L., Hobson, M. P., Lasenby, A. N., Lahav, Ofer, Rocha, Graca
Observations of large scale structure (LSS) and the Cosmic Microwave Background (CMB) each place separate constraints on the values of cosmological parameters. We calculate a joint likelihood based...