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Galaxy shapes of Light (GaLight): a 2D modeling of galaxy images

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arxiv 2111.08721 v1 pith:NQYMNWLR submitted 2021-11-16 astro-ph.GA astro-ph.IM

classification astro-ph.GAastro-ph.IM
keywords galightgalaxiesmodelingautomaticcodecomponentsfeaturesfitting
verification ladder T0 review T1 audit T2 compute T3 formal
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Galight is a Python-based open-source package that can be used to perform two-dimensional model fitting of optical and near-infrared images to characterize the light distribution of galaxies with components including a disk, bulge, bar, and quasar. The decomposition of stellar components has been demonstrated in published studies of inactive galaxies and quasar host galaxies observed by the Hubble Space Telescope and Subaru's Hyper Suprime-Cam. Galight utilizes the image modeling capabilities of lenstronomy while redesigning the user interface for the analysis of large samples of extragalactic sources. The package is user-friendly with some automatic features such as determining the cutout size of the modeling frame, searching for PSF-stars in field-of-view, estimating the noise map of the data, identifying all the objects to set the initial model, and associated parameters to fit them simultaneously. These features minimize the manpower and allow the automatic fitting tasks. The software is distributed under the MIT license. The source code, installation guidelines, and example notebooks code can be found at https://galight.readthedocs.io/en/latest/

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Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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    Completeness-weighted stacking of 56 HAEs at z≃6.2 gives median f_esc^Lyα = 0.106^{+0.066}_{-0.044} with no strong Hα-luminosity dependence and UV-linked galaxy-to-galaxy trends.

  2. Physically motivated AGN emissivity profiles and their effects on quasar microlensing signatures. 1. Multi-epoch accretion disc size inference

    astro-ph.GA 2026-07 accept novelty 6.0 of 10

    Interpreting composite disc-plus-BLR emission as a single compact disc systematically overestimates microlensing half-light radii, with the bias set mainly by the BLR flux fraction and the compact-disc emissivity shape.

  3. Understanding the Evolution of Black Hole Accretion and Dust out to z=4 with a Deep Imaging Extragalactic Survey with PRIMA

    astro-ph.GA 2025-09 conditional novelty 4.0 of 10

    PRIDES, a proposed deep PRIMA imaging survey over 1.6 square degrees of COSMOS, would detect tens of thousands of galaxies out to z=4 and constrain dust-obscured star formation and AGN.

  4. The $M_{\rm BH}-M_\star$ Relation of the hyperluminous Dust-obscured Quasars up to $z \sim 4$

    astro-ph.GA 2025-06 conditional novelty 4.0 of 10

    Hyperluminous Hot DOGs at z=1.5-3.7 show high Eddington ratios (median 1.05) and black hole to stellar mass ratios consistent with the local relation, suggesting they are progenitors of massive early-type galaxies.

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