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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00450295" target="_blank" >RIV/67985815:_____/16:00450295 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/mnras/stv2357" target="_blank" >http://dx.doi.org/10.1093/mnras/stv2357</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stv2357" target="_blank" >10.1093/mnras/stv2357</a>

Result language
angličtina
Original language name
Effect of an isotropic outflow from the Galactic Centre on the bow-shock evolution along the orbit
Original language description
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. Within the ambient velocity range of ?2000 km s1 the asymmetry is profound and the changes are considerable for different outflow velocities. As a case study we perform model calculations for the Dusty S-cluster Object (DSO/G2) as a potential young stellar object that is currently being monitored and has passed the pericentre at ∼2000 Schwarzschild radii from the supermassive black hole (Sgr A*) in 2014. 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.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Project
<a href="/en/project/GC13-00070J" target="_blank" >GC13-00070J: Accretion process in strong gravity of Galactic Center</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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