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VLA Observations of Orbital Motions in YLW 15

Published online by Cambridge University Press:  22 February 2018

S. Curiel ,
J.M. Girart ,
L.F. Rodríguez  and
J. Cantó
S. Curiel
Affiliation:
Instituto de Astronomía, UNAM, México. email: scuriel@astroscu.unam.mx
J.M. Girart
Affiliation:
Departament d’Astronomia i Meteorologia, Universitat de Barcelona, Barcelona, Spain
L.F. Rodríguez
Affiliation:
Instituto de Astronomía, UNAM, Morelia México
J. Cantó
Affiliation:
Instituto de Astronomía, UNAM, México. email: scuriel@astroscu.unam.mx

Abstract

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Using high angular resolution (~ 03) Very Large Array (VLA) observations made at 3.6 cm during the period 1990 to 2002, we report the detection of proper motions in the components of the binary source YLW 15. We find absolute proper motions of the order of 15 km s-1. In addition, the relative astrometry between the two components reveals orbital proper motions that suggest that the total mass of this binary system is ~ 1.7 M⊙, and that VLA 1 is more massive than VLA 2.

Resumen

Resumen

Reportamos la detección de movimientos propios en las componentes de la fuente binaria YLW 15, mediante observaciones de alta resolución angular (~ 03) en el VLA. Encontramos movimientos propios absolutos del orden de 15 km s-1. La astrometría relativa entre ambas componentes revela movimientos orbitales que sugieren que la masa total del sistema es de ~ 1.7 M⊙, y que VLA 1 tiene una masa mayor que VLA 2.

Keywords

Key Words:ISMJets and Outflows — StarsIndividual (YLW 15) — StarsPre-Main Sequence
Type
Observational Results for Very Young Binaries
Information
International Astronomical Union Colloquium , Volume 191: The Environment and Evolution of Double and Multiple Stars , August 2004 , pp. 137 - 138
Copyright
Copyright © Instituto de Astronomia – Mexico 2004

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