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Astrophysical Tests of Modified Gravity: the Morphology and Kinematics of Dwarf Galaxies
Vinu Vikram, Anna Cabre, Bhuvnesh Jain +1
This paper is the third in a series on tests of gravity using observations of stars and nearby dwarf galaxies. We carry out four distinct tests using published data on the kinemati…
Karhunen-Loeve Analysis for Weak Gravitational Lensing
Jacob T Vanderplas
In the past decade, weak gravitational lensing has become an important tool in the study of the universe at the largest scale, giving insights into the distribution of dark matter,…
Interpolating Masked Weak Lensing Signal with Karhunen-Loeve Analysis
Jake Vanderplas, Andrew Connolly, Bhuvnesh Jain +1
We explore the utility of Karhunen Loeve (KL) analysis in solving practical problems in the analysis of gravitational shear surveys. Shear catalogs from large-field weak lensing su…
Tests of Modified Gravity with Dwarf Galaxies
Bhuvnesh Jain, Jake Vanderplas
In modified gravity theories that seek to explain cosmic acceleration, dwarf galaxies in low density environments can be subject to enhanced forces. The class of scalar-tensor theo…
First-Year Sloan Digital Sky Survey-II (SDSS-II) Supernova Results: Constraints on Non-Standard Cosmological Models
J. Sollerman, E. Mörtsell, T. M. Davis +18
We use the new SNe Ia discovered by the SDSS-II Supernova Survey together with additional supernova datasets as well as observations of the cosmic microwave background and baryon a…
SNANA: A Public Software Package for Supernova Analysis
Richard Kessler, Joseph P. Bernstein, David Cinabro +8
We describe a general analysis package for supernova (SN) light curves, called SNANA, that contains a simulation, light curve fitter, and cosmology fitter. The software is designed…
First-year Sloan Digital Sky Survey-II (SDSS-II) Supernova Results: Hubble Diagram and Cosmological Parameters
Richard Kessler, Andrew Becker, David Cinabro +43
We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital S…