JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc [PDF]
The Astrophysical Journal, 2023 Star cluster formation in the early universe and its contribution to reionization remains largely unconstrained to date. Here we present JWST/NIRCam imaging of the most highly magnified galaxy known at z ∼ 6, the Sunrise arc.
Eros Vanzella +29 more
doaj +2 more sources
Modeling Dense Star Clusters in the Milky Way and beyond with the Cluster Monte Carlo Code [PDF]
Astrophysical Journal Supplement Series, 2021 We describe the public release of the Cluster Monte Carlo (CMC) code, a parallel, star-by-star N-body code for modeling dense star clusters. CMC treats collisional stellar dynamics using Hénon’s method, where the cumulative effect of many two-body ...
C. Rodriguez +11 more
semanticscholar +1 more source
Particle acceleration in winds of star clusters [PDF]
Monthly notices of the Royal Astronomical Society, 2021 The origin of cosmic rays in our Galaxy remains a subject of active debate. While supernova remnant (SNR) shocks are often invoked as the sites of acceleration, it is now widely accepted that the difficulties of such sources in reaching PeV energies ...
G. Morlino +3 more
semanticscholar +1 more source
Hierarchical black hole mergers in young, globular and nuclear star clusters: the effect of metallicity, spin and cluster properties [PDF]
, 2021 We explore hierarchical black hole (BH) mergers in nuclear star clusters (NSCs), globular clusters (GCs) and young star clusters (YSCs), accounting for both original and dynamically assembled binary BHs (BBHs).
M. Mapelli +10 more
semanticscholar +1 more source
Intermediate-mass black holes from stellar mergers in young star clusters [PDF]
Monthly notices of the Royal Astronomical Society, 2021 Intermediate-mass black holes (IMBHs) in the mass range $10^2\!-\!10^5\, \mathrm{M_{\odot }}$ bridge the gap between stellar black holes (BHs) and supermassive BHs. Here, we investigate the possibility that IMBHs form in young star clusters via runaway
Ugo N Di Carlo +10 more
semanticscholar +1 more source
Populating the Upper Black Hole Mass Gap through Stellar Collisions in Young Star Clusters [PDF]
Astrophysical Journal, 2020 Theoretical modeling of massive stars predicts a gap in the black hole (BH) mass function above ∼40–50 M ⊙ for BHs formed through single star evolution, arising from (pulsational) pair-instability supernovae (PISNe).
K. Kremer +8 more
semanticscholar +1 more source
On the Origin of GW190521-like Events from Repeated Black Hole Mergers in Star Clusters [PDF]
Astrophysical Journal, 2020 LIGO and Virgo have reported the detection of GW190521, from the merger of a binary black hole (BBH) with a total mass around 150 M⊙. While current stellar models limit the mass of any black hole (BH) remnant to about 40–50 M⊙, more massive BHs can be ...
G. Fragione, A. Loeb, F. Rasio
semanticscholar +1 more source
Intermediate-mass Black Holes from High Massive-star Binary Fractions in Young Star Clusters [PDF]
Astrophysical Journal, 2020 Black holes formed in dense star clusters, where dynamical interactions are frequent, may have fundamentally different properties than those formed through isolated stellar evolution.
E. Gonz'alez +7 more
semanticscholar +1 more source
Hunting for Neighboring Open Clusters with Gaia DR3: 101 New Open Clusters within 500 pc
The Astrophysical Journal Supplement Series, 2023 We systematically searched for open clusters in the solar neighborhood within 500 pc using the pyUPMASK and HDBSCAN clustering algorithms based on Gaia DR3.
Songmei Qin +3 more
doaj +1 more source
Dust-buried Compact Sources in the Dwarf Galaxy NGC 4449
The Astrophysical Journal, 2023 Multiwavelength images from the Hubble Space Telescope covering the wavelength range 0.27–1.6 μ m show that the central area of the nearby dwarf galaxy NGC 4449 contains several tens of compact sources that are emitting in the hydrogen recombination line
Daniela Calzetti +12 more
doaj +1 more source