The proper motion of HV2112: A TŻO candidate in the SMC

Abstract

The candidate Thorne-Żytkow object (TŻO), HV2112, is becoming a well-studied if enigmatic object. A key point of its candidacy as a TŻO is whether or not it resides in the Small Magellanic Cloud (SMC). HV2112 has detections in a series of photometric catalogues which have resulted in contradictory estimates of its proper motion and, therefore, its membership within the SMC. This letter seeks to resolve the issue of the SMC membership of HV2112 through a reanalysis of extant photometric data. We also demonstrate the difficulties and downfalls inherent in considering a range of catalogue proper motions. We conclude that the proper motion, and associated ancillary radial velocity, positional and photometric properties, are fully consistent with HV2112 being within the SMC and thus it remains a candidate TŻO.

5 pages, 5 figure, 1 table

References in corpus (5)

• PPM-Extended (PPMX) - a catalogue of positions and proper motions
• Discovery of a Thorne-Zytkow object candidate in the Small Magellanic Cloud
• HV2112, a Thorne-Zytkow Object or a Super Asymptotic Giant Branch Star
• Large proper motion of the Thorne-Żytkow object candidate HV 2112 reveals its likely nature as foreground Galactic S-star
• Binary Systems of core collapse supernova polluting a giant companion

Cited by in corpus (8)

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• A dearth of OH/IR stars in the Small Magellanic Cloud
• Prospects for Multimessenger Observations of Thorne-Żytkow Objects
• Explosions of Thorne-Zytkow objects
• Blue Supergiant X-ray Binaries in the Nearby Dwarf Galaxy IC 10
• Properties of Thorne-Zytkow object explosions
• Thorne-Żytkow Objects
• The Red Supergiant Content of the Local Group