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

## TL;DR

This paper reports the discovery of X8, a bipolar bow-shock source near Sgr A* with a potential stellar origin, distinguished by its morphology, spectral features, and proximity to the galactic center.

## Contribution

It introduces X8 as the closest bipolar bow-shock source near Sgr A*, with detailed observations suggesting it may be a young stellar object or planetary nebula, a novel finding in this region.

## Key findings

- X8 exhibits bipolar morphology and [Fe III] emission lines.
- X8 shows positional and spectral similarities to X7.
- A K-band continuum counterpart suggests a stellar source.

## Abstract

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.