Value Added Catalogs

In addition to the primary SDSS photometry and spectroscopy, there are a few extra catalogs created by our collaborators that are distributed through the SAS. These Value-Added Catalogs (VACs) are listed below, and include catalogs that were released in earlier data releases.

Cosmic web environmental densities from MCPM SlimeMold

Scientific Analysis Catalog

Cosmic Web Environmental Densities from Monte Carlo Physarum Machine for galaxies observed in SDSS and eBOSS

Joseph N. Burchett, Oskar Elek, Daisuke Nagai, Angus Forbes

Catalog Data

This dataset appears in DR16 SkyServer and CasJobs in the following tables:


This catalogue contains estimates of the local matter density at the location of galaxies based on the Monte Carlo Physarum Machine (MCPM) algorithm, inspired by the growth and movement of Physarum polycephalum slime mold. We employ this algorithm to reconstruct the cosmic web and provide estimates for the matter density field at the locations of SDSS galaxies, both those from the Classic SDSS and DR16 eBOSS Luminous Red Galaxies (LRG) programs. Detailed descriptions of the MCPM implementation, calibration, and use cases of these data are presented in a companion paper (Wilde et al., in preparation). The MCPM algorithm, the Polyphorm software (the interactive MCPM fitting application), and our initial applications of MCPM are described in Burchett et al. (2020), Elek et al. (2020), Simha et al. (2020), and Elek et al. (submitted).

Catalog last modified: 2021-12-06 09:41:13

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