TOI-6884b: A low-mass brown dwarf transiting a slightly evolved star

arXiv:2606.29666 · astro-ph.EP, astro-ph.SR · Submitted 2026-06-29 · Read on arXiv

Akanksha Khandelwal, Shubhendra Nath Das, Rishikesh Sharma, Abhijit Chakraborty, Churchil Dwivedi, Sanjay Baliwal, Karen A. Collins, David W. Latham, Allyson Bieryla, Cristilyn N. Watkins, Felipe Murgas, Norio Narita, Enric Palle, Steve B. Howell, Mark E. Everett, Catherine A. Clark, Polina A. Budnikova, David Ciardi, Nikitha Jithendran, Akihiko Fukui, Ashirbad Nayak, Bob Massey, Boris Safonov, Florence Libotte, Francis P. Wilkin, Gregor Srdoc, Howard M. Relles, Ivan Bonilla-Mariana, Izuru Fukuda, Jason D. Eastman, Jerome de Leon, Jesus Higuera, Kapil Bharadwaj, Keith Horne, Kendra Nguyen, Kevikumar Lad, Manuel Pichardo Marcano, Micaela Magno, Neelam JSSV Prasad, Noriharu Watanabe, Richard P. Schwarz, Sam Quinn, Santiago Paez, Toshi Suganuma, Y. Gomez Maqueo Chew

astro-ph.EP, astro-ph.SR

Submitted: 2026-06-29

Comments: 18 pages, 14 figures

DOI: 10.1093/mnras/stag988

Code: https://github.com/castro-gzlz/TESS-cont

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Aperture — 10× in this paper · explained in 1 episode
• Metallicity — 8× in this paper · explained in 3 episodes
• Aperture Photometry — 3× in this paper · explained in 1 episode
• Transiting Exoplanet Survey Satellite — 3× in this paper
• Adam — 2× in this paper · explained in 2 episodes
• Mikulski Archive for Space Telescopes — 2× in this paper
• Sternberg Astronomical Institute — 2× in this paper
• Transmission spectroscopy — 2× in this paper · explained in 2 episodes
• Alignment — 1× in this paper · explained in 1 episode
• Benchmark — 1× in this paper · explained in 2 episodes
• Calibration — 1× in this paper · explained in 7 episodes
• Core — 1× in this paper · explained in 2 episodes
• Fred Lawrence Whipple Observatory — 1× in this paper
• Society of Photo-Optical Instrumentation Engineers — 1× in this paper
• TESS Object of Interest — 1× in this paper

Sources

• EXOFASTv2: A public, generalized, publication-quality exoplanet modeling code
• Real-time processing of the imaging data from the network of Las Cumbres Observatory Telescopes using BANZAI
• The Impact of Irradiation on the Radius and Thermal Evolution of Transiting Brown Dwarfs
• Ariel: Enabling planetary science across light-years

Related papers

• PDS 70 c and SR 12 c: Observational Constraints on Giant-Planet and Satellite Formation
• Two-stage disruption of resonant chains
• Detectability of resolved hydrogen lines from the accretion shock at gas giants and their CPDs
• Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function
• Atmospheric escape fractionates secondary but not primary atmospheres
• The Occurrence Rate of Nearby Planetary Companions to Hot Jupiters