Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering

Debris disks, which consist of dust, planetesimals, planets, and gas, offer a unique window into the mineralogical composition of their parent bodies, especially during the critical phase of terrestrial planet formation spanning 10 yr to a few hundred million years. Observations from the Spitzer Spa...

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Main Authors: Cicero X. Lu, Tushar Mittal, Christine H. Chen, Alexis Y. Li, Kadin Worthen, B. A. Sargent, Carey M. Lisse, G. C. Sloan, Dean C. Hines, Dan M. Watson, Isabel Rebollido, Bin B. Ren, Joel D. Green
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal Supplement Series
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Online Access:https://doi.org/10.3847/1538-4365/ada0ba
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author Cicero X. Lu
Tushar Mittal
Christine H. Chen
Alexis Y. Li
Kadin Worthen
B. A. Sargent
Carey M. Lisse
G. C. Sloan
Dean C. Hines
Dan M. Watson
Isabel Rebollido
Bin B. Ren
Joel D. Green
author_facet Cicero X. Lu
Tushar Mittal
Christine H. Chen
Alexis Y. Li
Kadin Worthen
B. A. Sargent
Carey M. Lisse
G. C. Sloan
Dean C. Hines
Dan M. Watson
Isabel Rebollido
Bin B. Ren
Joel D. Green
author_sort Cicero X. Lu
collection DOAJ
description Debris disks, which consist of dust, planetesimals, planets, and gas, offer a unique window into the mineralogical composition of their parent bodies, especially during the critical phase of terrestrial planet formation spanning 10 yr to a few hundred million years. Observations from the Spitzer Space Telescope have unveiled thousands of debris disks, yet systematic studies remain scarce, let alone those with unsupervised clustering techniques. This study introduces CLustering UnsupErvised with Sequencer (CLUES), a novel, nonparametric, fully interpretable machine learning spectral analysis tool designed to analyze and classify the spectral data of debris disks. CLUES combines multiple unsupervised clustering methods with multiscale distance measures to discern new groupings and trends, offering insights into compositional diversity and geophysical processes within these disks. Our analysis allows us to explore a vast parameter space in debris disk mineralogy and also offers broader applications in fields such as protoplanetary disks and solar system objects. This paper details the methodology, implementation, and initial results of CLUES , setting the stage for more detailed follow-up studies focusing on debris disk mineralogy and demographics.
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series The Astrophysical Journal Supplement Series
spelling doaj-art-905ce65cbcfa41a0b33d2348666f01482025-02-04T12:17:31ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492025-01-0127626510.3847/1538-4365/ada0baSequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised ClusteringCicero X. Lu0https://orcid.org/0000-0001-9352-0248Tushar Mittal1https://orcid.org/0000-0002-8026-0018Christine H. Chen2https://orcid.org/0000-0002-8382-0447Alexis Y. Li3https://orcid.org/0009-0001-7058-8538Kadin Worthen4https://orcid.org/0000-0002-5885-5779B. A. Sargent5https://orcid.org/0000-0001-9855-8261Carey M. Lisse6https://orcid.org/0000-0002-9548-1526G. C. Sloan7https://orcid.org/0000-0003-4520-1044Dean C. Hines8https://orcid.org/0000-0003-4653-6161Dan M. Watson9https://orcid.org/0000-0001-8302-0530Isabel Rebollido10https://orcid.org/0000-0002-4388-6417Bin B. Ren11https://orcid.org/0000-0003-1698-9696Joel D. Green12https://orcid.org/0000-0003-1665-5709Gemini Observatory/NSF NOIRLab , 670 N. A’ohoku Pl., Hilo, HI 96720, USA ; cicero.lu@noirlab.edu; Department of Physics and Astronomy , The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USADepartment of Geosciences , Pennsylvania State University, 309 Deike Building, State College, PA 16801, USADepartment of Physics and Astronomy , The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA; Space Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USADepartment of Physics and Astronomy , The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USADepartment of Physics and Astronomy , The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USADepartment of Physics and Astronomy , The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA; Space Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USAJohns Hopkins University Applied Physics Laboratory , 11100 Johns Hopkins Rd., Laurel, MD 20723, USASpace Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USA; Department of Physics and Astronomy , University of North Carolina, Chapel Hill, NC 27599-3255, USASpace Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USADepartment of Physics and Astronomy , University of Rochester, 500 Wilson Blvd., Rochester, NY 14627, USAEuropean Space Astronomy Centre (ESAC) , Camino bajo del Castillo, s/n Urbanización Villafranca del Castillo, Villanueva de la Cañada, E-28692 Madrid, SpainUniversité Côte d’Azur , Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Bd de l’Observatoire, CS 34229, 06304 Nice cedex 4, France; Max-Planck-Institut für Astronomie (MPIA) , Königstuhl 17, D-69117 Heidelberg, GermanySpace Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USADebris disks, which consist of dust, planetesimals, planets, and gas, offer a unique window into the mineralogical composition of their parent bodies, especially during the critical phase of terrestrial planet formation spanning 10 yr to a few hundred million years. Observations from the Spitzer Space Telescope have unveiled thousands of debris disks, yet systematic studies remain scarce, let alone those with unsupervised clustering techniques. This study introduces CLustering UnsupErvised with Sequencer (CLUES), a novel, nonparametric, fully interpretable machine learning spectral analysis tool designed to analyze and classify the spectral data of debris disks. CLUES combines multiple unsupervised clustering methods with multiscale distance measures to discern new groupings and trends, offering insights into compositional diversity and geophysical processes within these disks. Our analysis allows us to explore a vast parameter space in debris disk mineralogy and also offers broader applications in fields such as protoplanetary disks and solar system objects. This paper details the methodology, implementation, and initial results of CLUES , setting the stage for more detailed follow-up studies focusing on debris disk mineralogy and demographics.https://doi.org/10.3847/1538-4365/ada0baDebris disksPlanetary system formationClusteringSilicate grainsInfrared spectroscopySpectroscopy
spellingShingle Cicero X. Lu
Tushar Mittal
Christine H. Chen
Alexis Y. Li
Kadin Worthen
B. A. Sargent
Carey M. Lisse
G. C. Sloan
Dean C. Hines
Dan M. Watson
Isabel Rebollido
Bin B. Ren
Joel D. Green
Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering
The Astrophysical Journal Supplement Series
Debris disks
Planetary system formation
Clustering
Silicate grains
Infrared spectroscopy
Spectroscopy
title Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering
title_full Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering
title_fullStr Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering
title_full_unstemmed Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering
title_short Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering
title_sort sequencing silicates in the spitzer infrared spectrograph debris disk catalog i methodology for unsupervised clustering
topic Debris disks
Planetary system formation
Clustering
Silicate grains
Infrared spectroscopy
Spectroscopy
url https://doi.org/10.3847/1538-4365/ada0ba
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