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43 papers
Tadpole Cosmology: Milne Solution as a Cosmological Constant Hideout
Stephen Appleby, Reginald Christian Bernardo
Dynamical cancellation frameworks present a potential means of mitigating the effect of a large vacuum energy, that would otherwise ruin the late-time, low energy dynamics of the U…
Cosmological Parameter Constraints from the SDSS Density and Momentum Power Spectra
Stephen Appleby, Motonari Tonegawa, Changbom Park +3
We extract the galaxy density and momentum power spectra from a subset of early-type galaxies in the SDSS DR7 main galaxy catalog. Using galaxy distance information inferred from t…
Tomographic Alcock-Paczynski Test with Redshift-Space Correlation Function: Evidence for the Dark Energy Equation of State Parameter w>-1
Fuyu Dong, Changbom Park, Sungwook E. Hong +4
The apparent shape of galaxy clustering depends on the adopted cosmology used to convert observed redshift to comoving distance, the relation, as it changes the line element…
Minkowski Tensors in Redshift Space -- Beyond the Plane Parallel Approximation
Stephen Appleby, Joby P. Kochappan, Pravabati Chingangbam +1
The Minkowski tensors (MTs) can be used to probe anisotropic signals in a field, and are well suited for measuring the redshift space distortion (RSD) signal in large scale structu…
Minkowski Functionals of SDSS-III BOSS : Hints of Possible Anisotropy in the Density Field?
Stephen Appleby, Changbom Park, Pratyush Pranav +4
We present measurements of the Minkowski functionals extracted from the SDSS-III BOSS catalogs. After defining the Minkowski functionals, we describe how an unbiased reconstruction…
The geometrical meaning of statistical isotropy of smooth random fields in two dimensions
Pravabati Chingangbam, Priya Goyal, K. P. Yogendran +1
We revisit the geometrical meaning of statistical isotropy that is manifest in excursion sets of smooth random fields in two dimensions. Using the contour Minkowski tensor, $\W_1$,…