RADIO PROPER MOTIONS OF THE NEARBY ULTRA-COOL DWARF BINARY VHS 1256-1257AB

被引：2

作者：

Rodriguez, L. F. ^{[1
,2
,4
]}

Dzib, S. A. ^{[3
]}

Zapata, L. A. ^{[1
,4
]}

Loinard, L. ^{[1
,4
]}

机构：

[1] UNAM, Inst Radioastronomia & Astrofis, Morelia, Mexico

[2] UNACH, Mesoamer Ctr Theoret Phys, Tuxtla Gutierrez, Mexico

[3] Max Planck Inst Radioastron, Auf dem Hugel 69, D-53121 Bonn, Germany

[4] Univ Nacl Autonoma Mexico, Inst Radioastron & Astrofis, Apartado Postal 3-72, Morelia 58090, Michoacan, Mexico

来源：

REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA | 2024年 / 60卷 / 01期

关键词：

astrometry; binaries: general; radio continuum: stars; stars:individual: VHS 1256-1257AB; ARCHITECTURE; EMISSION;

D O I：

10.22201/ia.01851101p.2024.60.01.02

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 ultracool dwarf binary VHS 1256-1257AB from Very Large Array (VLA) observations, that we find are consistent within error (similar or equal to 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.

引用

页码：13 / 18

页数：6

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