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arxiv 2401.15612 v1 pith:7H7A3RVH submitted 2024-01-28 astro-ph.GA

Spectroscopy evidence for a so far unknown young stellar cluster at the Galactic Center

classification astro-ph.GA
keywords stellarclusterscenterclustergalacticmassmissingnuclear
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The Nuclear Stellar Disk has been a highly active star-forming region in the Milky Way for approximately the last 30 million years. Despite hosting prominent clusters like Arches, Quintuplet, and Nuclear Stellar, their combined mass is less than 10% of the expected stellar mass, leading to the "missing cluster problem." Various factors, including high stellar density and tidal forces, contribute to this absence of clusters. Traces of dissolving clusters may exist as co-moving groups of stars, shedding light on the region's star formation history. Our analysis, utilizing integral field spectroscopy and astrophotometric data, reveals a group of young stellar objects in the NSD sharing velocities and positions, potentially indicating remnants of dissolved clusters or stellar associations. This finding contributes valuable insights into the understanding of the missing clusters problem in the Galactic center.

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