Star cluster ≈ Star cluster
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Multiple Stellar Populations in Globular Clusters Open
Globular clusters (GCs) exhibit star-to-star variations in specific elements (e.g., He, C, N, O, Na, Al) that bear the hallmark of high-temperature H-burning. These abundance variations can be observed spectroscopically and also photometri…
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Star Clusters Across Cosmic Time Open
Star clusters stand at the intersection of much of modern astrophysics: the ISM, gravitational dynamics, stellar evolution, and cosmology. Here, we review observations and theoretical models for the formation, evolution, and eventual disru…
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Binary black hole mergers from globular clusters: Masses, merger rates, and the impact of stellar evolution Open
The recent discovery of GW150914, the binary black hole merger detected by Advanced LIGO, has the potential to revolutionize observational astrophysics. But to fully utilize this new window into the universe, we must compare these new obse…
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The<i>Hubble Space Telescope</i>UV Legacy Survey of Galactic globular clusters – IX. The Atlas of multiple stellar populations Open
We use high-precision photometry of red-giant-branch (RGB) stars in 57 Galactic globular clusters (GCs), mostly from the 'Hubble Space Telescope (HST ) UV Legacy Survey of Galactic GCs', to identify and characterize their multiple stellar …
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High-Mass Star and Massive Cluster Formation in the Milky Way Open
This review examines the state-of-the-art knowledge of high-mass star and massive cluster formation, gained from ambitious observational surveys, which acknowledges the multiscale characteristics of these processes. After a brief overview …
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Gaia EDR3 view on galactic globular clusters Open
We use the data from Gaia Early Data Release 3 (EDR3) to study the kinematic properties of Milky Way globular clusters. We measure the mean parallaxes and proper motions (PM) for 170 clusters, determine the PM dispersion profiles for more …
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The O-Na And Mg-Al Anticorrelations In Turn-Off And Early Subgiants In Globular Clusters Open
High dispersion spectra (R greater than or similar to 40 000) for a quite large number of stars at the main sequence turn-off and at the base of the giant branch in NGC 6397 and NGC 6752 were obtained with the UVES on Kueyen (VLT UT2). The…
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MOCCA-SURVEY Database – I. Coalescing binary black holes originating from globular clusters Open
In this first of a series of papers, we utilize results for around 2000 star cluster models simulated using the mocca code for star cluster evolution (Survey Database I) to determine the astrophysical properties and local merger rate densi…
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Kinematics in Young Star Clusters and Associations with Gaia DR2 Open
The Gaia mission has opened a new window into the internal kinematics of young star clusters at the sub-km s −1 level, with implications for our understanding of how star clusters form and evolve. We use a sample of 28 clusters and associa…
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Post-Newtonian Dynamics in Dense Star Clusters: Highly Eccentric, Highly Spinning, and Repeated Binary Black Hole Mergers Open
We present models of realistic globular clusters with post-Newtonian dynamics for black holes. By modeling the relativistic accelerations and gravitational-wave emission in isolated binaries and during three- and four-body encounters, we f…
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Black holes: The next generation—repeated mergers in dense star clusters and their gravitational-wave properties Open
When two black holes merge in a dense star cluster, they form a new black\nhole with a well-defined mass and spin. If that "second-generation" black hole\nremains in the cluster, it will continue to participate in dynamical\nencounters, fo…
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The APOGEE-2 Survey of the Orion Star-forming Complex. II. Six-dimensional Structure Open
We present an analysis of spectroscopic and astrometric data from APOGEE-2 and Gaia DR2 to identify structures toward the Orion Complex. By applying a hierarchical clustering algorithm to the six-dimensional stellar data, we identify spati…
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Massive black hole binaries from runaway collisions: the impact of metallicity Open
The runaway collision scenario is one of the most promising mechanisms to explain the formation of intermediate-mass black holes (IMBHs) in young dense star clusters. On the other hand, the massive stars that participate in the runaway col…
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Proper motions and dynamics of the Milky Way globular cluster system from<i>Gaia</i>DR2 Open
We use Gaia Data Release 2 to determine the mean proper motions for 150 Milky\nWay globular clusters (almost the entire known population), with a typical\nuncertainty of 0.05 mas/yr limited mainly by systematic errors. Combining them\nwith…
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Merging black holes in young star clusters Open
Searching for distinctive signatures, which characterize different formation\nchannels of binary black holes (BBHs), is a crucial step towards the\ninterpretation of current and future gravitational wave detections. Here, we\ninvestigate t…
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Updated parameters of 1743 open clusters based on <i>Gaia</i> DR2 Open
In this study, we follow up our recent paper (Monteiro et al. 2020) and present a homogeneous sample of fundamental parameters of open clusters in our Galaxy, entirely based on Gaia DR2 data. We used published membership probability of the…
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The formation of a bound star cluster: From the Orion nebula cluster to the Pleiades Open
Direct N-body calculations are presented of the formation of Galactic clusters using GASEX, which is a variant of the code Nbody6. The calculations focus on the possible evolution of the Orion nebula cluster (ONC) by assuming that the embe…
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Improving the open cluster census Open
Context. Data from the Gaia satellite are revolutionising our understanding of the Milky Way. With every new data release, there is a need to update the census of open clusters. Aims. We aim to conduct a blind, all-sky search for open clus…
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The dragon simulations: globular cluster evolution with a million stars Open
Introducing the dragon simulation project, we present direct N-body simulations of four massive globular clusters (GCs) with 106 stars and 5 per cent primordial binaries at a high level of accuracy and realism. The GC evolution is computed…
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DYNAMICAL FORMATION OF THE GW150914 BINARY BLACK HOLE Open
We explore the possibility that GW150914, the binary black hole (BBH) merger recently detected by Advanced LIGO, was formed by gravitational interactions in the core of a dense star cluster. Using models of globular clusters (GCs) with det…
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The R136 star cluster dissected with<i>Hubble Space Telescope</i>/STIS. I. Far-ultraviolet spectroscopic census and the origin of He ii λ1640 in young star clusters Open
We introduce a Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph (STIS) stellar census of R136a, the central ionizing star cluster of 30 Doradus. We present low resolution far-ultraviolet STIS spectroscopy of R136 using 17 …
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The E-MOSAICS project: simulating the formation and co-evolution of galaxies and their star cluster populations Open
We introduce the MOdelling Star cluster population Assembly In Cosmological Simulations within EAGLE (E-MOSAICS) project. E-MOSAICS incorporates models describing the formation, evolution, and disruption of star clusters into the EAGLE gal…
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Black hole growth through hierarchical black hole mergers in dense star clusters: implications for gravitational wave detections Open
In a star cluster with a sufficiently large escape velocity, black holes\n(BHs) that are produced by BH mergers can be retained, dynamically form new BH\nbinaries, and merge again. This process can repeat several times and lead to\nsignifi…
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A Catalog of Newly Identified Star Clusters in Gaia DR2 Open
We present the Star cluster Hunting Pipeline (SHiP) that can identify star clusters in Gaia second data release (DR2) data and establish a star cluster catalog for the Galactic disk. A friend-of-friend-based cluster finder method is used t…
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A detached stellar-mass black hole candidate in the globular cluster NGC 3201 Open
As part of our massive spectroscopic survey of 25 Galactic globular clusters with MUSE, we performed multiple epoch observations of NGC 3201 with the aim of constraining the binary fraction. In this cluster, we found one curious star at th…
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A stellar census in globular clusters with MUSE: The contribution of rotation to cluster dynamics studied with 200 000 stars Open
This is the first of a series of papers presenting the results from our\nsurvey of 25 Galactic globular clusters with the MUSE integral-field\nspectrograph. In combination with our dedicated algorithm for source\ndeblending, MUSE provides …
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The SILCC project – III. Regulation of star formation and outflows by stellar winds and supernovae Open
We study the impact of stellar winds and supernovae on the multiphase interstellar medium using three-dimensional hydrodynamical simulations carried out with FLASH. The selected galactic disc region has a size of (500 pc)2 × ±5 kpc and a g…
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<i>N</i>-body modelling of globular clusters: masses, mass-to-light ratios and intermediate-mass black holes Open
We have determined the masses and mass-to-light ratios of 50 Galactic globular clusters by comparing their velocity dispersion and surface brightness profiles against a large grid of 900 N-body simulations of star clusters of varying initi…
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The Hubble Space Telescope UV legacy survey of galactic globular clusters – XVI. The helium abundance of multiple populations Open
Recent work, based on data from the Hubble Space Telescope (HST) UV Legacy\nSurvey of Galactic Globular Clusters (GCs), has revealed that all the analyzed\nclusters host two groups of first- (1G) and second-generation (2G) stars. In\nmost …
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Masses and scaling relations for nuclear star clusters, and their co-existence with central black holes Open
Galactic nuclei typically host either a nuclear star cluster (NSC, prevalent in galaxies with masses ≲1010 M⊙) or a massive black hole (MBH, common in galaxies with masses ≳1012 M⊙). In the intermediate-mass range, some nuclei host both an…