The Carbon-to-oxygen Ratio in Cool Brown Dwarfs and Giant Exoplanets. I. The Benchmark Late-T Dwarfs GJ 570D, HD 3651B, and Ross 458C by Mark W. Phillips, Michael C. Liu, Zhoujian Zhang

Subjects: “…Brown dwarfs…”
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Hotter than Expected: Hubble Space Telescope (HST)/WFC3 Phase-resolved Spectroscopy of a Rare Irradiated Brown Dwarf with Strong Internal Heat Flux by Rachael C. Amaro, Dániel Apai, Yifan Zhou, Ben W. P. Lew, Sarah L. Casewell, L. C. Mayorga, Mark S. Marley, Xianyu Tan, Joshua D. Lothringer, Vivien Parmentier, Travis Barman

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Direct-imaging Discovery of a Substellar Companion Orbiting the Accelerating Variable Star HIP 39017 by Taylor L. Tobin, Thayne Currie, Yiting Li, Jeffrey Chilcote, Timothy D. Brandt, Brianna Lacy, Masayuki Kuzuhara, Maria Vincent, Mona El Morsy, Vincent Deo, Jonathan P. Williams, Olivier Guyon, Julien Lozi, Sebastien Vievard, Nour Skaf, Kyohoon Ahn, Tyler Groff, N. Jeremy Kasdin, Taichi Uyama, Motohide Tamura, Aidan Gibbs, Briley L. Lewis, Rachel Bowens-Rubin, Maïssa Salama, Qier An, Minghan Chen

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Dynamical and Atmospheric Characterization of the Substellar Companion HD 33632 Ab from Direct Imaging, Astrometry, and Radial-velocity Data by Mona El Morsy, Thayne Currie, Danielle Bovie, Masayuki Kuzuhara, Brianna Lacy, Yiting Li, Taylor Tobin, Timothy D. Brandt, Jeffrey Chilcote, Olivier Guyon, Tyler D. Groff, Julien Lozi, Sebastien Vievard, Vincent Deo, Nour Skaf, Francois Bouchy, Isabelle Boisse, Erica Dykes, N. Jeremy Kasdin, Motohide Tamura

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Investigating Possible Binarity for GJ 229B by Alex R. Howe, Avi M. Mandell, Michael W. McElwain

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Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques by Hunter Brooks, Dan Caselden, J. Davy Kirkpatrick, Yadukrishna Raghu, Charles A. Elachi, Jake Grigorian, Asa Trek, Andrew Washburn, Hiro Higashimura, Aaron M. Meisner, Adam C. Schneider, Jacqueline K. Faherty, Federico Marocco, Christopher R. Gelino, Jonathan Gagné, Thomas P. Bickle, Shih-Yun Tang, Austin Rothermich, Adam J. Burgasser, Marc J. Kuchner, Paul Beaulieu, John Bell, Guillaume Colin, Giovanni Colombo, Alexandru Dereveanco, Deiby Pozo Flores, Konstantin Glebov, Leopold Gramaize, Les Hamlet, Ken Hinckley, Martin Kabatnik, Frank Kiwy, David W. Martin, Raúl F. Palma Méndez, Billy Pendrill, Lizzeth Ruiz, John Sanchez, Arttu Sainio, Jörg Schümann, Manfred Schonau, Christopher Tanner, Nikolaj Stevnbak, Andres Stenner, Melina Thévenot, Vinod Thakur, Nikita V. Voloshin, Zbigniew Wȩdracki, The Backyard Worlds: Planet 9 Collaboration

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The Polar Vortex Hypothesis: Evolving, Spectrally Distinct Polar Regions Explain Short- and Long-term Light-curve Evolution and Color–Inclination Trends in Brown Dwarfs and Giant Exoplanets by Nguyen Fuda, Dániel Apai

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High-precision Atmospheric Characterization of a Y Dwarf with JWST NIRSpec G395H Spectroscopy: Isotopologue, C/O Ratio, Metallicity, and the Abundances of Six Molecular Species by Ben W. P. Lew, Thomas Roellig, Natasha E. Batalha, Michael Line, Thomas Greene, Sagnick Murkherjee, Richard Freedman, Michael Meyer, Charles Beichman, Catarina Alves de Oliveira, Matthew De Furio, Doug Johnstone, Alexandra Z. Greenbaum, Mark Marley, Jonathan J. Fortney, Erick T. Young, Jarron Leisenring, Martha Boyer, Klaus Hodapp, Karl Misselt, John Stansberry, Marcia Rieke

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Precise Mass, Orbital Motion, and Stellar Properties of the M-dwarf Binary LP 349−25AB by Salvador Curiel, Gisela N. Ortiz-León, Amy J. Mioduszewski, Anthony B. Arenas-Martinez

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Direct Imaging Explorations for Companions around Mid–Late M Stars from the Subaru/IRD Strategic Program by Taichi Uyama, Charles Beichman, Masayuki Kuzuhara, Markus Janson, Takayuki Kotani, Dimitri Mawet, Bun’ei Sato, Motohide Tamura, Hiroyuki Tako Ishikawa, Bryson Cale, Thayne Currie, Hiroki Harakawa, Thomas Henning, Teruyuki Hirano, Klaus Hodapp, Yasunori Hori, Masato Ishizuka, Shane Jacobson, Yui Kasagi, Eiichiro Kokubo, Mihoko Konishi, Tomoyuki Kudo, Takashi Kurokawa, Nobuhiko Kusakabe, Jungmi Kwon, Masahiro Machida, Takao Nakagawa, Norio Narita, Jun Nishikawa, Masahiro Ogihara, Masashi Omiya, Takuma Serizawa, Akitoshi Ueda, Sébastien Vievard, Ji Wang

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The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 μm Spectrum of the Planetary-mass Companion VHS 1256–1257 b by Brittany E. Miles, Beth A. Biller, Polychronis Patapis, Kadin Worthen, Emily Rickman, Kielan K. W. Hoch, Andrew Skemer, Marshall D. Perrin, Niall Whiteford, Christine H. Chen, B. Sargent, Sagnick Mukherjee, Caroline V. Morley, Sarah E. Moran, Mickael Bonnefoy, Simon Petrus, Aarynn L. Carter, Elodie Choquet, Sasha Hinkley, Kimberly Ward-Duong, Jarron M. Leisenring, Maxwell A. Millar-Blanchaer, Laurent Pueyo, Shrishmoy Ray, Steph Sallum, Karl R. Stapelfeldt, Jordan M. Stone, Jason J. Wang, Olivier Absil, William O. Balmer, Anthony Boccaletti, Mariangela Bonavita, Mark Booth, Brendan P. Bowler, Gael Chauvin, Valentin Christiaens, Thayne Currie, Camilla Danielski, Jonathan J. Fortney, Julien H. Girard, Carol A. Grady, Alexandra Z. Greenbaum, Thomas Henning, Dean C. Hines, Markus Janson, Paul Kalas, Jens Kammerer, Grant M. Kennedy, Matthew A. Kenworthy, Pierre Kervella, Pierre-Olivier Lagage, Ben W. P. Lew, Michael C. Liu, Bruce Macintosh, Sebastian Marino, Mark S. Marley, Christian Marois, Elisabeth C. Matthews, Brenda C. Matthews, Dimitri Mawet, Michael W. McElwain, Stanimir Metchev, Michael R. Meyer, Paul Molliere, Eric Pantin, Andreas Quirrenbach, Isabel Rebollido, Bin B. Ren, Glenn Schneider, Malavika Vasist, Mark C. Wyatt, Yifan Zhou, Zackery W. Briesemeister, Marta L. Bryan, Per Calissendorff, Faustine Cantalloube, Gabriele Cugno, Matthew De Furio, Trent J. Dupuy, Samuel M. Factor, Jacqueline K. Faherty, Michael P. Fitzgerald, Kyle Franson, Eileen C. Gonzales, Callie E. Hood, Alex R. Howe, Adam L. Kraus, Masayuki Kuzuhara, Anne-Marie Lagrange, Kellen Lawson, Cecilia Lazzoni, Pengyu Liu, Jorge Llop-Sayson, James P. Lloyd, Raquel A. Martinez, Johan Mazoyer, Sascha P. Quanz, Jea Adams Redai, Matthias Samland, Joshua E. Schlieder, Motohide Tamura, Xianyu Tan, Taichi Uyama, Arthur Vigan, Johanna M. Vos, Kevin Wagner, Schuyler G. Wolff, Marie Ygouf, Xi Zhang, Keming Zhang, Zhoujian Zhang

Subjects: “…Brown dwarfs…”
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JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs by Loïc Albert, Sandy K. Leggett, Per Calissendorff, Thomas Vandal, J. Davy Kirkpatrick, Daniella C. Bardalez Gagliuffi, Matthew De Furio, Michael Meyer, Charles A. Beichman, Adam J. Burgasser, Michael C. Cushing, Jacqueline Kelly Faherty, Clémence Fontanive, Christopher R. Gelino, John E. Gizis, Alexandra Z. Greenbaum, Frantz Martinache, Mamadou N’Diaye, Benjamin J. S. Pope, Thomas L. Roellig, Johannes Sahlmann, Anand Sivaramakrishnan, Marie Ygouf

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Periodic Radio Emission from the T8 Dwarf WISE J062309.94–045624.6 by Kovi Rose, Joshua Pritchard, Tara Murphy, Manisha Caleb, Dougal Dobie, Laura Driessen, Stefan W. Duchesne, David L. Kaplan, Emil Lenc, Ziteng Wang

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Eight New Substellar Hyades Candidates from the UKIRT Hemisphere Survey by Adam C. Schneider, Michael C. Cushing, Robert A. Stiller, Jeffrey A. Munn, Frederick J. Vrba, Justice Bruursema, Stephen J. Williams, Michael C. Liu, Alexia Bravo, Jacqueline K. Faherty, Austin Rothermich, Emily Calamari, Dan Caselden, Martin Kabatnik, Arttu Sainio, Thomas P. Bickle, William Pendrill, Nikolaj Stevnbak Andersen, Melina Thévenot

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An Informed and Systematic Method to Identify Variable Mid-L Dwarfs by Natalia Oliveros-Gomez, Elena Manjavacas, Daniella C. Bardalez Gagliuffi, Theodora Karalidi, Johanna M. Vos, Jacqueline K. Faherty

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VLTI/GRAVITY Provides Evidence the Young, Substellar Companion HD 136164 Ab Formed Like a “Failed Star” by William O. Balmer, L. Pueyo, S. Lacour, J. J. Wang, T. Stolker, J. Kammerer, N. Pourré, M. Nowak, E. Rickman, S. Blunt, A. Sivaramakrishnan, D. Sing, K. Wagner, G.-D. Marleau, A.-M. Lagrange, R. Abuter, A. Amorim, R. Asensio-Torres, J.-P. Berger, H. Beust, A. Boccaletti, A. Bohn, M. Bonnefoy, H. Bonnet, M. S. Bordoni, G. Bourdarot, W. Brandner, F. Cantalloube, P. Caselli, B. Charnay, G. Chauvin, A. Chavez, E. Choquet, V. Christiaens, Y. Clénet, V. Coudé du Foresto, A. Cridland, R. Davies, R. Dembet, A. Drescher, G. Duvert, A. Eckart, F. Eisenhauer, N. M. Förster Schreiber, P. Garcia, R. Garcia Lopez, E. Gendron, R. Genzel, S. Gillessen, J. H. Girard, S. Grant, X. Haubois, G. Heißel, Th. Henning, S. Hinkley, S. Hippler, M. Houllé, Z. Hubert, L. Jocou, M. Keppler, P. Kervella, L. Kreidberg, N. T. Kurtovic, V. Lapeyrère, J.-B. Le Bouquin, P. Léna, D. Lutz, A.-L. Maire, F. Mang, A. Mérand, P. Mollière, C. Mordasini, D. Mouillet, E. Nasedkin, T. Ott, G. P. P. L. Otten, C. Paladini, T. Paumard, K. Perraut, G. Perrin, O. Pfuhl, D. C. Ribeiro, L. Rodet, Z. Rustamkulov, J. Shangguan, T. Shimizu, C. Straubmeier, E. Sturm, L. J. Tacconi, A. Vigan, F. Vincent, K. Ward-Duong, F. Widmann, T. Winterhalder, J. Woillez, S. Yazici, the GRAVITY Collaboration

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Self-consistent Models of Y Dwarf Atmospheres with Water Clouds and Disequilibrium Chemistry by Brianna Lacy, Adam Burrows

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Gaia-4b and 5b: Radial Velocity Confirmation of Gaia Astrometric Orbital Solutions Reveal a Massive Planet and a Brown Dwarf Orbiting Low-mass Stars by Gudmundur Stefánsson, Suvrath Mahadevan, Joshua N. Winn, Marcus L. Marcussen, Shubham Kanodia, Simon Albrecht, Evan Fitzmaurice, Onė Mikulskytė, Caleb I. Cañas, Juan I. Espinoza-Retamal, Yiri Zwart, Daniel M. Krolikowski, Andrew Hotnisky, Paul Robertson, Jaime A. Alvarado-Montes, Chad F. Bender, Cullen H. Blake, J. R. Callingham, William D. Cochran, Megan Delamer, Scott A. Diddams, Jiayin Dong, Rachel B. Fernandes, Mark R. Giovinazzi, Samuel Halverson, Jessica Libby-Roberts, Sarah E. Logsdon, Michael W. McElwain, Joe P. Ninan, Jayadev Rajagopal, Varghese Reji, Arpita Roy, Christian Schwab, Jason T. Wright

“…Gaia-4b is a massive planet ( M  = 11.8 ± 0.7 M _J ) in a P  = 571.3 ± 1.4 day orbit with a projected semimajor axis a _0  = 0.312 ± 0.040 mas orbiting a 0.644 ± 0.02 M _⊙ star. Gaia-5b is a brown dwarf ( M  = 20.9 ± 0.5 M _J ) in a P  = 358.62 ± 0.20 days eccentric e  = 0.6423 ± 0.0026 orbit with a projected angular semimajor axis of a _0  = 0.947 ± 0.038 mas around a 0.34 ± 0.03 M _⊙ star. …”
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Time-resolved Hubble Space Telescope Wide Field Camera 3 Spectrophotometry Reveals Inefficient Day-to-night Heat Redistribution in the Highly Irradiated Brown Dwarf SDSS 1557B by Rachael C. Amaro, Dániel Apai, Ben W. P. Lew, Yifan Zhou, Joshua D. Lothringer, Sarah L. Casewell, Xianyu Tan, Travis Barman, Mark S. Marley, L. C. Mayorga, Vivien Parmentier

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Atmospheric circulation of exoplanets by Yuchen Lian, Yongyun Hu

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