2011/11/28 by Gisela N. Ortiz-León, G. N. Ortiz-Leon, Ortiz-Leon, G. N. +5
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Star Formation Studies #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies #astro-ph.SR
paper · pdf · doi:10.48550/arxiv.1111.6486
11 pages, 4 figures, to appear in Revista Mexicana de Astronomia y Astrofisica
arxiv created 2011/11/28 · openalex publication_date 2011/11/28 · arxiv updated 2011/11/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Cyg OB2 #5 is a contact binary system (O6.5-7+O5.5-6) with associated radio continuum emission. Two compact (≤ 0\rlap."3) radio continuum components have been reported previously: the primary one is associated with the contact binary and the secondary one is an arc-like source ∼ 0\rlap."8 to the NE of the primary. This arc-like source results from the interaction of the winds of the contact binary and a B-type star in the region. In this paper we report the detection of an extended (∼ 30"), non-thermal component to the NE of the compact components. We propose that this extended emission could be an unresolved background source (i. e. a radio galaxy), extended galactic emission, or non-thermal emission related with relativistic electrons that are produced in the shock between the contact binary and the B-type star and that are carried away to large distances by the wind from the contact binary.