학술논문
Photometry of Outer Solar System Objects from the Dark Energy Survey. I. Photometric Methods, Light-curve Distributions, and Trans-Neptunian Binaries
Document Type
article
Author
Pedro H. Bernardinelli; Gary M. Bernstein; Nicholas Jindal; T. M. C. Abbott; M. Aguena; O. Alves; F. Andrade-Oliveira; J. Annis; D. Bacon; E. Bertin; D. Brooks; D. L. Burke; A. Carnero Rosell; M. Carrasco Kind; J. Carretero; L. N. da Costa; M. E. S. Pereira; T. M. Davis; S. Desai; H. T. Diehl; P. Doel; S. Everett; I. Ferrero; D. Friedel; J. Frieman; J. García-Bellido; G. Giannini; D. Gruen; K. Herner; S. R. Hinton; D. L. Hollowood; K. Honscheid; D. J. James; K. Kuehn; J. L. Marshall; J. Mena-Fernández; F. Menanteau; R. Miquel; R. L. C. Ogando; A. Palmese; A. Pieres; A. A. Plazas Malagón; M. Raveri; E. Sanchez; I. Sevilla-Noarbe; M. Smith; E. Suchyta; M. E. C. Swanson; G. Tarle; C. To; A. R. Walker; P. Wiseman; Y. Zhang; (The DES Collaboration)
Source
The Astrophysical Journal Supplement Series, Vol 269, Iss 1, p 18 (2023)
Subject
Language
English
ISSN
1538-4365
0067-0049
0067-0049
Abstract
We report the methods of and initial scientific inferences from the extraction of precision photometric information for the >800 trans-Neptunian objects (TNOs) discovered in the images of the Dark Energy Survey (DES). Scene-modeling photometry is used to obtain shot-noise-limited flux measures for each exposure of each TNO, with background sources subtracted. Comparison of double-source fits to the pixel data with single-source fits are used to identify and characterize two binary TNO systems. A Markov Chain Monte Carlo method samples the joint likelihood of the intrinsic colors of each source as well as the amplitude of its flux variation, given the time series of multiband flux measurements and their uncertainties. A catalog of these colors and light-curve amplitudes A is included with this publication. We show how to assign a likelihood to the distribution q ( A ) of light-curve amplitudes in any subpopulation. Using this method, we find decisive evidence (i.e., evidence ratio