2026-05-19T17:53:55Zhttps://keep.lib.asu.edu/oai/request

oai:keep.lib.asu.edu:node-2005252025-06-04T23:10:31Zoai_pmh:alloai_pmh:repo_items

200525 https://hdl.handle.net/2286/R.2.N.200525 http://rightsstatements.org/vocab/InC/1.0/ http://creativecommons.org/licenses/by-nc-sa/4.0 2025-05 44 pages Charley, Kiera Patience, Jennifer Young, Patrick Barrett, The Honors College School of Earth and Space Exploration Using data in the Keck Observatory Archives of B & A stars from the Hipparcos Catalogue, direct images taken in the K-band were observed for potential companion candidates. Images of interest were corrected by subtracting their darks and dividing them by flats to verify their existence further. Separation distances from their host star were also calculated to determine whether these objects were known. Estimations of spectral class from apparent magnitude and calculated absolute magnitude were performed for some primary stars and companions, based upon their status as saturated or unsaturated. Proper motion of these objects based upon their observation date is also noted. Using the SIMBAD database in conjunction with the distances, host stars were noted as possessing daughter objects verified through our imaging search or as unknown. Future works involve observations of our revised target list at the Keck Observatory or other facilities to verify our results and provide second epochs that are instrumental in distinguishing these candidates as co-moving companions or background objects. Further work would also be performed to distinguish between planetary bodies or intermediate masses like brown stars, with the aid of direct imaging and spectroscopy. Astrophysics Direct Imaging Brown dwarfs A Direct Imaging Search for Substellar Companions Around B & A Stars