New HW Virginis Systems from the MUCHFUSS Project
V. Schaffenroth, S. Geier, I. Barbu-Barna, U. Heber, T. Kupfer, O., Cordes

TL;DR
This paper reports the discovery of two new HW Virginis systems from the MUCHFUSS project, including the shortest-period system and a rare brown dwarf companion, expanding knowledge of these binary star systems.
Contribution
The study presents the identification of two new HW Virginis systems, including the shortest-period and a brown dwarf companion, providing new insights into binary star evolution.
Findings
J1920 has a 0.169-day orbital period with an M dwarf companion.
J1622 has the shortest period of 0.069 days among HW Virginis systems.
J1622's companion is a close brown dwarf, the second such found orbiting a subdwarf B star.
Abstract
In course of the MUCHFUSS project we found two new HW Virginis systems. J192059+372220 (J1920) has an orbital period of 0.169 d and an M dwarf companion with a mass of . J162256+473051 (J1622) has the shortest period (0.069 d) of all known HW Virginis systems. Its companion has a mass of and is therefore the second close brown dwarf found orbiting a subdwarf B star.
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Taxonomy
TopicsMagnetic confinement fusion research · Superconducting Materials and Applications · Nuclear reactor physics and engineering
