2008/04/30 by M. Gromadzki, J. Mikołajewska, J. Mikolajewska · 4 citations
Physics and Astronomy · #Angular momentum #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Classical mechanics #Context (archaeology) #Elliptic orbit #Galaxy #Geology #Orbit (dynamics) #Orbit determination #Orbital eccentricity #Orbital elements #Orbital motion #Orbital period #Orbital speed #Physics #Position (finance) #Position angle #Radial velocity #Satellite #Stars #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1051/0004-6361:200810052
7 pages, 4 figures, accepted for publication in A&A
arxiv created 2009/01/14 · openalex publication_date 2009/01/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
<i>Context. <i/>R Aqr is one of the closest symbiotic binaries and the only D-type system with radial velocity data suitable for orbital parameter estimation.<i>Aims. <i/>The aims of our study are to derive a reliable spectroscopic orbit of the Mira component, and to establish connections between the orbital motion and other phenomena exhibited by R Aqr.<i>Methods. <i/>We reanalyze and revise the velocity data compiled by McIntosh & Rustan complemented by additional velocities.<i>Results. <i/>We find an eccentric orbit () with a period 43.6 yr. This solution is in agreement with a resolved VLA observation of this system. We demonstrate that the last increase in extinction towards the Mira variable in 1974–1981 occurred during its superior, spectroscopic conjunction, and can be due to obscuration by a neutral material in the accreting stream. We also show that jet ejection is not connected with the orbital position.