A new white dwarf companion to the $\Delta\mu$ star GJ 3346

24 Feb 2020 Bonavita M. Fontanive C. Desidera S. D'Orazi V. Zurlo A. Muzic K. Biller B. Gratton R. Mesa D. Sozzetti A.

We present the discovery of a white dwarf companion at 3.6" from GJ3346, a nearby ($\pi\sim$42 mas) K star observed with [email protected] as part of an open time survey for faint companions to objects with significant proper motion discrepancies ($\Delta\mu$) between Gaia DR1 and Tycho-2. Syrius-like systems like GJ3346AB, which include a main sequence star and a white dwarf, can be difficult to detect because of the intrinsic faintness of the latter... (read more)

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  • SOLAR AND STELLAR ASTROPHYSICS
  • EARTH AND PLANETARY ASTROPHYSICS