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Radio Proper Motions of the Nearby Ultra-cool dwarf binary VHS 1256$-$1257AB

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arxiv 2309.08812 v1 pith:YYNIE3F3 submitted 2023-09-15 astro-ph.SR astro-ph.HE

classification astro-ph.SRastro-ph.HE
keywords binarymotionsproperdifferentradiosourceconsistentdwarf
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abstract

The proper motions of a source obtained at different epochs or in different spectral regions should in principle be consistent. However, in the case of a binary source or a source with associated ejecta, they could be different depending on the epochs when the observations were made and on what emission is traced in each spectral region. In this paper we determine the radio proper motions of the ultra-cool dwarf binary VHS 1256$-$1257AB from Very Large Array (VLA) observations, that we find are consistent within error ($\simeq 2-3\%$) with those reported by Gaia DR3. The comparison of the proper motions and the analysis of the VLA data imply that, as in the optical, the radio emission is coming in comparable amounts from both components of the unresolved binary.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Upper Limits to the Proper Motions of JuMBO 24, a Jupiter-Mass Binary Object Candidate in Orion

    astro-ph.EP 2025-04 conditional novelty 4.0 of 10

    JuMBO 24, a candidate free-floating planetary-mass binary in Orion, shows no significant proper motion, implying a plane-of-sky velocity below about 6 km/s.

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