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Open superclusters II. Discovery of an inactive supercluster including a new star cluster in the solar neighborhood.

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Title: Open superclusters II. Discovery of an inactive supercluster including a new star cluster in the solar neighborhood.
Authors: Casado, Juan1 (AUTHOR) jcasadoo@hotmail.com, Hendy, Yasser2 (AUTHOR), Faltov, Nikola3 (AUTHOR), Kovaleva, Dana4 (AUTHOR)
Source: Advances in Space Research. Jul2026, Vol. 78 Issue 2, p1740-1752. 13p.
Subjects: Star clusters, Kinematics, Star formation, Astronomical observations
Abstract: The number of known star clusters, associations, and moving groups in the vicinity of the Sun has increased significantly due to the use of Gaia data. We investigated the existence and properties of open superclusters (OSC) within 500 pc of the Sun, with a particular focus on a newly identified OSC, designated HC8. Using advanced Gaia-derived astrometric data and star cluster catalogs, we identify and analyze member stars of various clusters, deriving key parameters such as ages, distances, extinctions, and kinematic properties. Our findings reveal that HC8, a previously unrecognized OSC, encompasses several young clusters, including the newly discovered cluster Duvia 1. We provide a detailed examination of HC8's star formation history and its spatial and kinematic characteristics. This study contributes to the growing body of evidence supporting the existence of highly populated primordial groups and enhances our understanding of the formation and evolution of star clusters in the Galaxy. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The number of known star clusters, associations, and moving groups in the vicinity of the Sun has increased significantly due to the use of Gaia data. We investigated the existence and properties of open superclusters (OSC) within 500 pc of the Sun, with a particular focus on a newly identified OSC, designated HC8. Using advanced Gaia-derived astrometric data and star cluster catalogs, we identify and analyze member stars of various clusters, deriving key parameters such as ages, distances, extinctions, and kinematic properties. Our findings reveal that HC8, a previously unrecognized OSC, encompasses several young clusters, including the newly discovered cluster Duvia 1. We provide a detailed examination of HC8's star formation history and its spatial and kinematic characteristics. This study contributes to the growing body of evidence supporting the existence of highly populated primordial groups and enhances our understanding of the formation and evolution of star clusters in the Galaxy. [ABSTRACT FROM AUTHOR]
ISSN:02731177
DOI:10.1016/j.asr.2026.04.088