Publications

2026

1. 

   SPT-CL J0417-4748: A Deep Chandra Study of a Relaxed Galaxy Cluster without Central Star Formation

   Taweewat Somboonpanyakul, Adam B. Mantz, Steven W. Allen, and 7 more authors

   Astrophysical Journal, Mar 2026

   A deep Chandra study shows that SPT-CL J0417-4748 is a relaxed cool-core cluster whose central galaxy remains quenched despite short cooling times in the intracluster gas.

   Bib

   @article{2026ApJ..1000...42S,
     author = {{Somboonpanyakul}, Taweewat and {Mantz}, Adam B. and {Allen}, Steven W. and {Flores}, Anthony M. and {Morris}, R. Glenn and {Stueber}, Haley R. and {Bleem}, Lindsey E. and {Floyd}, Benjamin and {Hlavacek-Larrondo}, Julie and {Kim}, Keunho J.},
     title = {{SPT-CL J0417-4748: A Deep Chandra Study of a Relaxed Galaxy Cluster without Central Star Formation}},
     journal = {Astrophysical Journal},
     keywords = {Galaxy clusters, Cool cores, X-ray astronomy, 584, 302, 1810, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies},
     year = {2026},
     month = mar,
     volume = {1000},
     number = {1},
     eid = {42},
     pages = {42},
     doi = {10.3847/1538-4357/ae4727},
     archiveprefix = {arXiv},
     eprint = {2602.16295},
     primaryclass = {astro-ph.CO},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2026ApJ..1000...42S},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
   }

2022

1. 

   The Evolution of AGN Activity in Brightest Cluster Galaxies

   T. Somboonpanyakul, M. McDonald, A. Noble, and 79 more authors

   Astronomical Journal, Apr 2022

   This paper traces how active galactic nucleus activity in brightest cluster galaxies evolves over time, linking black hole feedback to the changing properties of galaxy clusters.

   Bib

   @article{2022AJ....163..146S,
     author = {{Somboonpanyakul}, T. and {McDonald}, M. and {Noble}, A. and {Aguena}, M. and {Allam}, S. and {Amon}, A. and {Andrade-Oliveira}, F. and {Bacon}, D. and {Bayliss}, M.~B. and {Bertin}, E. and {Bhargava}, S. and {Brooks}, D. and {Buckley-Geer}, E. and {Burke}, D.~L. and {Calzadilla}, M. and {Canning}, R. and {Carnero Rosell}, A. and {Carrasco Kind}, M. and {Carretero}, J. and {Costanzi}, M. and {da Costa}, L.~N. and {Pereira}, M.~E.~S. and {De Vicente}, J. and {Doel}, P. and {Eisenhardt}, P. and {Everett}, S. and {Evrard}, A.~E. and {Ferrero}, I. and {Flaugher}, B. and {Floyd}, B. and {Garc{\'\i}a-Bellido}, J. and {Gaztanaga}, E. and {Gerdes}, D.~W. and {Gonzalez}, A. and {Gruen}, D. and {Gruendl}, R.~A. and {Gschwend}, J. and {Gupta}, N. and {Gutierrez}, G. and {Hinton}, S.~R. and {Hollowood}, D.~L. and {Honscheid}, K. and {Hoyle}, B. and {James}, D.~J. and {Jeltema}, T. and {Khullar}, G. and {Kim}, K.~J. and {Klein}, M. and {Kuehn}, K. and {Lima}, M. and {Maia}, M.~A.~G. and {Marshall}, J.~L. and {Martini}, P. and {Melchior}, P. and {Menanteau}, F. and {Miquel}, R. and {Mohr}, J.~J. and {Morgan}, R. and {Ogando}, R.~L.~C. and {Palmese}, A. and {Paz-Chinch{\'o}n}, F. and {Pieres}, A. and {Plazas Malag{\'o}n}, A.~A. and {Reil}, K. and {Romer}, A.~K. and {Ruppin}, F. and {Sanchez}, E. and {Saro}, A. and {Scarpine}, V. and {Schubnell}, M. and {Serrano}, S. and {Sevilla-Noarbe}, I. and {Singh}, P. and {Smith}, M. and {Soares-Santos}, M. and {Strazzullo}, V. and {Suchyta}, E. and {Swanson}, M.~E.~C. and {Tarle}, G. and {To}, C. and {Tucker}, D.~L. and {Wilkinson}, R.~D.},
     title = {{The Evolution of AGN Activity in Brightest Cluster Galaxies}},
     journal = {Astronomical Journal},
     keywords = {Galaxy clusters, Galaxy evolution, 584, 594, Astrophysics - Astrophysics of Galaxies},
     year = {2022},
     month = apr,
     volume = {163},
     number = {4},
     eid = {146},
     pages = {146},
     doi = {10.3847/1538-3881/ac5030},
     archiveprefix = {arXiv},
     eprint = {2201.08398},
     primaryclass = {astro-ph.GA},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2022AJ....163..146S},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
   }

2021

1. 

   The Clusters Hiding in Plain Sight (CHiPS) Survey: Complete Sample of Extreme BCG Clusters

   Taweewat Somboonpanyakul, Michael McDonald, Massimo Gaspari, and 2 more authors

   Astrophysical Journal, Mar 2021

   This work presents the complete CHiPS survey sample of extreme brightest-cluster-galaxy systems and characterizes the massive clusters hidden behind their unusually bright central sources.

   Bib

   @article{2021ApJ...910...60S,
     author = {{Somboonpanyakul}, Taweewat and {McDonald}, Michael and {Gaspari}, Massimo and {Stalder}, Brian and {Stark}, Antony A.},
     title = {{The Clusters Hiding in Plain Sight (CHiPS) Survey: Complete Sample of Extreme BCG Clusters}},
     journal = {Astrophysical Journal},
     keywords = {Galaxy clusters, 584, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies},
     year = {2021},
     month = mar,
     volume = {910},
     number = {1},
     eid = {60},
     pages = {60},
     doi = {10.3847/1538-4357/abe1bc},
     archiveprefix = {arXiv},
     eprint = {2101.01730},
     primaryclass = {astro-ph.CO},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2021ApJ...910...60S},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
   }

2. 

   The Clusters Hiding in Plain Sight (CHiPS) Survey: CHIPS1911+4455, a Rapidly Cooling Core in a Merging Cluster

   Taweewat Somboonpanyakul, Michael McDonald, Matthew Bayliss, and 6 more authors

   Astrophysical Journal Letters, Jan 2021

   This letter identifies CHIPS1911+4455 as a merging galaxy cluster that still hosts an exceptionally rapid central cooling core.

   Bib

   @article{2021ApJ...907L..12S,
     author = {{Somboonpanyakul}, Taweewat and {McDonald}, Michael and {Bayliss}, Matthew and {Voit}, Mark and {Donahue}, Megan and {Gaspari}, Massimo and {Dahle}, H{\r{a}}kon and {Rivera-Thorsen}, Emil and {Stark}, Antony},
     title = {{The Clusters Hiding in Plain Sight (CHiPS) Survey: CHIPS1911+4455, a Rapidly Cooling Core in a Merging Cluster}},
     journal = {Astrophysical Journal Letters},
     keywords = {Galaxy clusters, Starburst galaxies, 584, 1570, Astrophysics - Astrophysics of Galaxies},
     year = {2021},
     month = jan,
     volume = {907},
     number = {1},
     eid = {L12},
     pages = {L12},
     doi = {10.3847/2041-8213/abd540},
     archiveprefix = {arXiv},
     eprint = {2101.01731},
     primaryclass = {astro-ph.GA},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2021ApJ...907L..12S},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
   }

2018

1. 

   The Clusters Hiding in Plain Sight (CHiPS) Survey: A First Discovery of a Massive Nearby Cluster around PKS 1353-341

   Taweewat Somboonpanyakul, Michael McDonald, Henry W. Lin, and 2 more authors

   Astrophysical Journal, Aug 2018

   This discovery paper reveals a massive nearby galaxy cluster around PKS 1353-341 that had been overlooked because of its bright central radio source.

   Bib

   @article{2018ApJ...863..122S,
     author = {{Somboonpanyakul}, Taweewat and {McDonald}, Michael and {Lin}, Henry W. and {Stalder}, Brian and {Stark}, Antony},
     title = {{The Clusters Hiding in Plain Sight (CHiPS) Survey: A First Discovery of a Massive Nearby Cluster around PKS 1353-341}},
     journal = {Astrophysical Journal},
     keywords = {galaxies: clusters: general, galaxies: clusters: intracluster medium, X-rays: galaxies: clusters, Astrophysics - Astrophysics of Galaxies},
     year = {2018},
     month = aug,
     volume = {863},
     number = {2},
     eid = {122},
     pages = {122},
     doi = {10.3847/1538-4357/aace55},
     archiveprefix = {arXiv},
     eprint = {1806.05676},
     primaryclass = {astro-ph.GA},
     adsurl = {https://ui.adsabs.harvard.edu/abs/2018ApJ...863..122S},
     adsnote = {Provided by the SAO/NASA Astrophysics Data System},
   }