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The Companions to B and A Stars Snapshot (C-BASS) Survey. I. Discovery of a Young Brown Dwarf Companion to HIP 17453

Authors: Marah Brinjikji, Adam J. R. W. Smith, Jenny Patience, Eric L. Nielsen, Austin Ware, Jorge A. Sanchez, Robert De Rosa, Jasmine Garani, Emma Softich, Michael C. Liu, Bruce A. Macintosh, Thomas M. Esposito, Brendan P. Bowler, William M. J. Best, Sarah Blunt, Trent J. Dupuy, Justin Hom, Jessica Klusmeyer, Franck Marchis, Jayke S. Nguyen, Anne E. Peck, Mark W. Phillips, William Roberson, Jean-Baptiste Ruffio, William Thompson, Zahed Wahhaj, Samuel Walker, Jason J. Wang, Patrick A. Young

Marah Brinjikji et al 2026 The Astronomical Journal 172 .

Provider: AAS Journals

Caption: Figure 2.

The contrast curve for HIP 17453 A from the initial C-BASS discovery epoch shows even these 5 minute snapshot observations go deep enough to detect brown dwarf companions beyond ∼1″. HIP 17453 B (red star) is detected at high significance in this dataset. The Sonora Diamondback (C. V. Morley et al. 2024) grid of atmosphere and evolutionary models was used to convert ΔK_s contrast to mass.

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