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2021RNAAS...5..243A - Research Notes of the AAS, 5, 243 (2021/October-0)

HD 41004: A Photometric Sheep in Wolf's Clothing?

AYRES T. and BUZASI D.

Abstract (from CDS):

HD 41004 is an unusual multiple star/planet system. Recent TESS photometry revealed a striking 31 hr period, far too short for the slowly rotating K dwarf primary. Instead, the modulation likely is from the diminutive dM secondary, spun-up to synchronous rotation by its close-in brown dwarf companion, and suffering intense magnetic activity as a result. If so, the red dwarf is perhaps destined to someday return the favor by cannibalizing its substellar partner.

Abstract Copyright: © 2021. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Stellar activity - Brown dwarfs - Exoplanets

Simbad objects: 3

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