2.2k citations · 12.3k across the 114 of their papers we have counts for
5 papers · 1 filter
Deriving Photometric Redshifts using Fuzzy Archetypes and Self-Organizing Maps. II. Comparing Sampling Techniques Using Mock Data
Joshua S. Speagle, Daniel J. Eisenstein
In a companion paper, we proposed combining large numbers of "fuzzy archetypes" with Self-Organizing Maps (SOMs) to derive photometric redshifts in a data-driven way. In this paper…
Deriving Photometric Redshifts using Fuzzy Archetypes and Self-Organizing Maps. I. Methodology
Joshua S. Speagle, Daniel J. Eisenstein
We propose a method to substantially increase the flexibility and power of template fitting-based photometric redshifts by transforming a large numbers of galaxy spectral templates…
Mapping the Galaxy Color-Redshift Relation: Optimal Photometric Redshift Calibration Strategies for Cosmology Surveys
Daniel Masters, Peter Capak, Daniel Stern +17
Calibrating the photometric redshifts of >10^9 galaxies for upcoming weak lensing cosmology experiments is a major challenge for the astrophysics community. The path to obtaining t…
Exploring Photometric Redshifts as an Optimization Problem: An Ensemble MCMC and Simulated Annealing-Driven Template-Fitting Approach
Joshua S. Speagle, Peter L. Capak, Daniel J. Eisenstein +2
Using a grid of million elements () adapted from COSMOS photometric redshift (photo-z) searches, we investigate the general properties of template-based photo-…
The Impossibly Early Galaxy Problem
Charles L. Steinhardt, Peter Capak, Dan Masters +1
The current hierarchical merging paradigm and CDM predict that the universe should be a time in which the most massive galaxies are transitioning from their initial…