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arxiv: 1903.05986 · v2 · pith:Z3O3KASCnew · submitted 2019-03-14 · 🌌 astro-ph.GA

A new bow-shock source with bipolar morphology in the vicinity of Sgr A*

classification 🌌 astro-ph.GA
keywords sourcebipolarvicinityblue-shiftedcounterpartemissionmakesmorphology
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Here we present a new bowshock blue-shifted source in the close vicinity of Sgr A* that we name X8. We use data-sets that are based on SINFONI observations with the Very Large Telescope. We can trace the source between 2006 and 2016 in the blue-shifted line maps and it shows not only positional similarities to X7 but also the same spectral footprint. The symmetry axis of both extended sources points towards Sgr A* and exhibits [Fe III] emission lines that arise due to wind-wind shocks. In particular, the source X8 has a bipolar morphology, which makes it the closest bipolar source in the vicinity of Sgr A*. In addition, we can trace a K-band continuum counterpart of X8. This points towards a stellar counterpart to the line-map emission. Overall, the source X8 can be interpreted as either a Young Stellar Object or a young planetary nebula, which makes this source unique among so-far detected main-sequence OB stars in this region.

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