# Discovery of Two Small High-Velocity Compact Clouds in the Central 10 Parsecs of Our Galaxy

## TL;DR

This paper reports the discovery of two small, high-velocity compact clouds near the Galactic center, likely driven by invisible black holes plunging into molecular clouds, revealing new insights into the region's hidden compact objects.

## Contribution

The study identifies two small high-velocity clouds in the Galactic center, suggesting they are driven by isolated black holes, a novel interpretation of such clouds' origins.

## Key findings

- Discovered two small high-velocity compact clouds in the Galactic center.
- Both clouds have broad velocity widths and compact sizes.
- The clouds are likely driven by invisible black holes plunging into molecular clouds.

## Abstract

We discovered two small high-velocity compact clouds (HVCCs) in HCN $J=4-3$ and $J=3-2$ maps of the central 20 pc of our Galaxy. Both HVCCs have broad velocity widths ($\Delta V \gtrsim 40$ km s$^{-1}$) and compact sizes ($d\sim 1$ pc), and originate from the dense molecular clouds in the position-velocity space. One of them has a faint counterpart in a Paschen-$\alpha$ image. Their spatial structure, kinematics, and absence of luminous stellar object are compatible with the notion that each of the small HVCCs is driven by the plunge of an invisible compact object into a molecular cloud. Such objects are most likely inactive, isolated black holes.