Effect of an isotropic outflow from the Galactic Centre on the bow-shock evolution along the orbit

0450295 - ASÚ 2017 RIV GB eng J - Článek v odborném periodiku
Zajaček, Michal - Eckart, A. - Karas, Vladimír - Kunneriath, Devaky - Shahzamanian, B. - Sabha, N. - Muzic, K. - Valencia-S, M.
Effect of an isotropic outflow from the Galactic Centre on the bow-shock evolution along the orbit.
Monthly Notices of the Royal Astronomical Society. Roč. 455, č. 2 (2016), s. 1257-1274. ISSN 0035-8711. E-ISSN 1365-2966
Grant CEP: GA ČR(CZ) GC13-00070J
Výzkumný záměr: CEZ:AV0Z1003909
Institucionální podpora: RVO:67985815
Klíčová slova: galactic centre * black hole * bow-shock
Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
Impakt faktor: 4.961, rok: 2016

We analyse the effect of a potential outflow from the centre on bow-shock properties. Due to the non-negligible isotropic central outflow the bow-shock evolution along the orbit becomes asymmetric between the pre-peribothron and post-peribothron phases. This is demonstrated by the calculation of the bow-shock size evolution, the velocity along the shocked layer, the surface density of the bow shock, and by emission-measure maps close to the peribothron passage. We show that the velocity field of the shocked layer can contribute to the observed increasing line width of the DSO source up to the peribothron. Furthermore, the decline of the bow-shock emission measure in the post-peribothron phase could help to reveal the emission of the putative star.
Trvalý link: http://hdl.handle.net/11104/0253574