Galaxy Zoo : 'Hanny's Voorwerp', a quasar light echo? (2009)
Lintott, Chris, Schawinski, Kevin, Keel, William, Van Arkel, Hanny, Bennert, Nicola, Edmondson, Edward, ...
We report the discovery of an unusual object near the spiral galaxy IC 2497, discovered by visual inspection of the Sloan Digital Sky Survey (SDSS) as part of the Galaxy Zoo project. The object,...
Jimenez, Raul, Slosar, Anze, Verde, Licia, Bamford, Steven, Lintott, Chris, Schawinski, Kevin, ...
We report on the finding of a correlation between galaxies' past star formation activity and the degree to which neighbouring galaxies rotation axes are aligned. This is obtained by cross-correlating...
Galaxy Zoo: A sample of blue early-type galaxies at low redshift (2009)
Schawinski, Kevin, Lintott, Chris, Thomas, Daniel, Sarzi, Marc, Andreescu, Dan, Bamford, Steven P., ...
We report the discovery of a population of nearby, blue early-type galaxies with high star formation rates (0.5 < SFR < 50 Msun/yr). They are identified by their visual morphology as provided by...
Galaxy Zoo: a sample of blue early-type galaxies at low redshift (2009)
Schawinski, Kevin, Lintott, Chris, Thomas, Daniel, Sarzi, Marc, Andreescu, Dan, Bamford, Steven P., ...
Galaxy Zoo: Chiral correlation function of galaxy spins (2008)
Slosar, Anze, Land, Kate, Bamford, Steven, Lintott, Chris, Andreescu, Dan, Murray, Phil, ...
Galaxy Zoo is the first study of nearby galaxies that contains reliable information about the spiral sense of rotation of galaxy arms for a sizeable number of galaxies. We measure the correlation...
Living in a Void: Testing the Copernican Principle with Distant Supernovae (2008)
Clifton, Timothy, Ferreira, Pedro G., Land, Kate
A fundamental presupposition of modern cosmology is the Copernican Principle; that we are not in a central, or otherwise special region of the Universe. Studies of Type Ia supernovae, together with...
Galaxy Zoo: the dependence of morphology and colour on environment (2008)
Bamford, Steven P., Nichol, Robert C., Baldry, Ivan K., Land, Kate, Lintott, Chris J., Schawinski, Kevin, ...
We analyse the relationships between galaxy morphology, colour, environment and stellar mass using data for over 100,000 objects from Galaxy Zoo, the largest sample of visually classified...
Lintott, Chris J., Schawinski, Kevin, Slosar, Anze, Land, Kate, Bamford, Steven, Thomas, Daniel, ...
In order to understand the formation and subsequent evolution of galaxies one must first distinguish between the two main morphological classes of massive systems: spirals and early-type systems....
Land, Kate, Slosar, Anze, Lintott, Chris, Andreescu, Dan, Bamford, Steven, Murray, Phil, ...
We re-examine the evidence for a violation of large-scale statistical isotropy in the distribution of projected spin vectors of spiral galaxies. We have a sample of $\sim 37,000$ spiral galaxies from...
Gordon, Christopher, Land, Kate, Slosar, Anze
We estimate the solar system motion relative to the cosmic microwave background using type Ia supernovae (SNe) measurements. We take into account the correlations in the error bars of the SNe...
Correlation between galactic HI and the Cosmic Microwave Background (2007)
We revisit the issue of a correlation between the atomic hydrogen gas in our local Galaxy and the Cosmic Microwave Background (CMB), a detection of which has been claimed in some literature. We...
Cosmological Constraints from Type Ia Supernovae Peculiar Velocity Measurements (2007)
Gordon, Christopher, Land, Kate, Slosar, Anze
We detect the correlated peculiar velocities of nearby type Ia supernovae (SNe), while highlighting an error in some of the literature. We find sigma_8=0.79 +/- 0.22 from SNe, and examine the...
Probability Density of the Multipole Vectors for a Gaussian Cosmic Microwave Background (2007)
We review Maxwell's multipole vectors, and elucidate some of their mathematical properties, with emphasis on the application of this tool to the cosmic microwave background (CMB). In particular, for...
The Axis of Evil revisited (2006)
In light of the three-year data release from WMAP we re-examine the evidence for the ``Axis of Evil'' (AOE). We discover that previous statistics are not robust with respect to the data-sets...
Cross-correlation of 2MASS and WMAP3: Implications for the Integrated Sachs-Wolfe effect (2006)
Rassat, Anais, Land, Kate, Lahav, Ofer, Abdalla, Filipe B.
We perform a cross-correlation of the Cosmic Microwave Background (CMB) using the third year Wilkinson Microwave Anisotropy Probe (WMAP) data with the 2 Micron All Sky Survey (2MASS) galaxy map...
Template fitting and the large-angle CMB anomalies (2005)
We investigate two possible explanations for the large-angle anomalies in the Cosmic Microwave Background (CMB): an intrinsically anisotropic model and an inhomogeneous model. We take as an example...
We investigate the point-parity and mirror-parity handedness of the large angle anisotropy in the cosmic microwave background (CMB). In particular we consider whether the observed low CMB quadrupole...
The Multipole Vectors of WMAP, and their frames and invariants (2005)
We investigate the Statistical Isotropy and Gaussianity of the CMB fluctuations, using a set of multipole vector functions capable of separating these two issues. In general a multipole is broken...
We examine previous claims for a preferred axis at $(b,l)\approx (60,-100)$ in the cosmic radiation anisotropy, by generalizing the concept of multipole planarity to any shape preference (a concept...
Multipole invariants and non-Gaussianity (2004)
We propose a framework for separating the information contained in the CMB multipoles, $a_{\ell m}$, into its algebraically independent components. Thus we cleanly separate information pertaining to...
Cubic anomalies in WMAP (2004)
We perform a frequentist analysis of the bispectrum of WMAP first year data. We find clear signal domination up to l=200, with overall consistency with Gaussianity except for the following features....