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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 1.

Keck/NIRC2 K_s-band observations of the HIP 17453 system obtained on 2013 December 18 (top left), 2024 February 18 (top right), and 2024 October 26 (bottom left), as well as a J-band observation obtained on 2025 October 09, showing the location of the primary HIP 17453 A (yellow star) and the substellar companion HIP 17453 B (indicated with a white arrow). In the two C-BASS observations (top row), the primary was blocked with a 600 mas coronagraphic spot to reduce scattered light and enhance contrast. The top two images have been processed using pyKLIP (J. J. Wang et al. 2015) to subtract the stellar PSF from the image. HIP 17453 B is clearly detected in each observation.

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