English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We analyze the gas and dust emission in the immediate vicinity of thesupermassive black hole Sgr~A* at the Galactic center (GC) with the ESO VLT(Paranal/Chile) instruments SINFONI and VISIR. The SINFONI H+K data cubes showseveral emission lines with related line map counterparts. From these lines,the Br$\gamma$ emission is the most prominent one and appears to be shaped as abar extending along the North-South direction. With VISIR, we find a dustycounterpart to this filamentary emission. In this work, we present evidencethat this feature can be most likely connected to the mini-spiral andpotentially influenced by the winds of the massive stars in the central clusteror an accretion wind from Sgr~A*. To this end, we co-add the SINFONI databetween 2005 and 2015. The spectroscopic analysis reveals a range ofDoppler-shifted emission lines. We also detect substructures in the shape ofclumps that can be investigated in the channel maps of the Br$\gamma$-bar. Inaddition, we compare the detection of the near-infrared (NIR) Br$\gamma$feature to PAH1 mid-infrared (MIR) observations and published 226 GHz radiodata. These clumps show a proper motion of about $320$km/s that are consistentwith other infrared continuum detected filaments in the Galactic center.Deriving a mass of $2.5\,\times\,10^{-5}\,M_{\odot}$ for the investigatedBr$\gamma$-feature shows an agreement with former derived masses for similarobjects. Besides the North-South Br$\gamma$-bar, we find a comparableadditional East-West feature. Also, we identify several gas reservoirs that arelocated west of Sgr~A* that may harbor dusty objects.

astrophysical journal/the astrophysical journal

Near- and mid-infrared observations in the inner tenth of a parsec of  the Galactic center -- Detection of proper motion of a filament very close to  Sgr~A*