Milky Way Star Clusters and Gaia: A Review of the Ongoing Revolution

Cantat-Gaudin, T.

doi:10.3390/universe8020111

Cited by 33 publications

(23 citation statements)

References 303 publications

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“…Limited by Galactic dust extinction and field-star contamination, the identification of cluster members and the establishment of complete cluster samples are a difficult task. However, Gaia satellite (Gaia Collaboration et al 2016) observations have yielded a large amount of stellar data with accurate astrometric measurements (Gaia Collaboration et al 2018a, 2021, and many studies based on these data have revealed a huge increase in the number of identified star clusters (Cantat-Gaudin 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Differently to asterisms or field stars along a given line of sight, the member stars of a cluster have the same characteristics in terms of spatial and kinematic locations; this allows stellar aggregates to be found by clustering based on astrometric data (Castro-Ginard et al 2018;Liu & Pang 2019). Up to now, the majority of new clusters were detected through the DBSCAN clustering algorithm (e.g., Castro-Ginard et al 2020, 2022He et al 2021He et al , 2022 and its improved method HDBSCAN (e.g., Kounkel & Covey 2019;Hunt & Reffert2021). DBSCAN has been demonstrated to be a very efficient blind search method in big-data approaches (Gao et al 2014;Cantat-Gaudin 2022).…”

Section: Introductionmentioning

confidence: 99%

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A Blind All-sky Search for Star Clusters in Gaia EDR3: 886 Clusters within 1.2 kpc of the Sun

Wang

Luo

et al. 2022

ApJS

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Although previous searches for star clusters have been very successful, many clusters are likely still omitted, especially at high-Galactic-latitude regions. In this work, based on the astrometry of Gaia EDR3, we searched nearby (ϖ > 0.8 mas) all-sky regions, obtaining 886 star clusters, of which 270 candidates have not been cataloged before. At the same time, we have presented the physical parameters of the clusters by fitting theoretical isochrones to their optical magnitudes. More halo members and expanding structures in many star clusters were also found. Most of the new objects are young clusters that are less than 100 million years old. Our work greatly increased the sample size and physical parameters of star clusters in the solar neighborhood, in particular, 46 clusters are newly found with ∣b∣ > 20°, which represents a nearly threefold increase in the number of clusters at high-Galactic-latitude regions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Blind All-sky Search for Star Clusters in Gaia EDR3: 886 Clusters within 1.2 kpc of the Sun

Wang

Luo

et al. 2022

ApJS

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“…In this work we are reporting distant open clusters (older tan 1.2 Gyr) instead of single stars, as shown in most of the papers referred above. A recent review of the spatial distribution of star clusters and the impact of the subsequent releases of Gaia data on the topic can be found in Cantat-Gaudin (2022).…”

Section: Discussionmentioning

confidence: 99%

An analysis of the most distant catalogued open clusters -- Re-assessing fundamental parameters with Gaia EDR3 and $\texttt{ASteCA}$

Perren,

Pera,

Navone

et al. 2022

Preprint

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Context. Several studies have been presented in the last few years applying some kind of automatic processing of data to estimate the fundamental parameters of open clusters. These parameters are later on employed in larger scale analyses, for example the structure of the Galaxy's spiral arms. The distance is one of the more straightforward parameters to estimate, yet enormous differences can still be found among published data. This is particularly true for open clusters located more than a few kpc away. Aims. We cross-matched several published catalogues and selected the twenty-five most distant open clusters (>9000 pc). We then performed a detailed analysis of their fundamental parameters, with emphasis on their distances, to determine the agreement between catalogues and our estimates. Methods. Photometric and astrometric data from the Gaia EDR3 survey was employed. The data was processed with our own membership analysis code (pyUPMASK), and our package for automatic fundamental cluster's parameters estimation (ASteCA). Results. We find differences in the estimated distances of up to several kpc between our results and those catalogued, even for the catalogues that show the best matches with ASteCA values. Large differences are also found for the age estimates. As a by-product of the analysis we find that vd Bergh-Hagen 176 could be the open cluster with the largest heliocentric distance catalogued to date. Conclusions. Caution is thus strongly recommended when using catalogued parameters of open clusters to infer large-scale properties of the Galaxy, particularly for those located more than a few kpc away.

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“…Limited by Galactic dust extinction and field star contamination, the identification of cluster members and the establishment of complete cluster samples are a difficult task. However, Gaia satellite (Gaia Collaboration et al 2016) observations have yielded a large amount of stellar data with accurate astrometric measurements (Gaia Collaboration et al 2018a, 2021, and many studies based on these data have brought a huge increase in the number of identified star clusters (Cantat-Gaudin 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Kounkel & Covey 2019;Hunt & Reffert 2021). DBSCAN has been demonstrated to be a very efficient blind search method in big-data approaches (Gao et al 2014;Cantat-Gaudin 2022).…”

Section: Introductionmentioning

confidence: 99%

A Blind All-sky Search for Star Clusters in Gaia EDR3: 886 Clusters within 1.2 kpc of the Sun

He,

Wang,

Luo

et al. 2022

Preprint

View full text Add to dashboard Cite

Although previous searches for star clusters have been very successful, many clusters are likely still omitted, especially at high Galactic latitude regions. In this work, based on the astrometry of Gaia EDR3, we searched nearby ( > 0.8 mas) all-sky regions, obtaining 886 star clusters, of which 270 candidates have not been cataloged before. At the same time, we have presented the physical parameters of the clusters by fitting theoretical isochrones to their optical magnitudes. More halo members and expanding structures in many star clusters were also found. Most of the new objects are young clusters that are less than 100 million years old. Our work greatly increased the sample size and physical parameters of star clusters in the solar neighborhood, in particular, 46 clusters are newly found with |b| > 20 • , which represents an increase of nearly three fold of cluster numbers at high Galactic latitude regions. The cluster parameters and member stars are available at CDS via https://cdsarc.u-strasbg.fr/ftp/vizier.submit//hezh22b/, and the cluster figure sets are available via

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Milky Way Star Clusters and Gaia: A Review of the Ongoing Revolution

Cited by 33 publications

References 303 publications

A Blind All-sky Search for Star Clusters in Gaia EDR3: 886 Clusters within 1.2 kpc of the Sun

A Blind All-sky Search for Star Clusters in Gaia EDR3: 886 Clusters within 1.2 kpc of the Sun

An analysis of the most distant catalogued open clusters -- Re-assessing fundamental parameters with Gaia EDR3 and $\texttt{ASteCA}$

A Blind All-sky Search for Star Clusters in Gaia EDR3: 886 Clusters within 1.2 kpc of the Sun

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