Results 51 to 60 of about 288,605 (224)

To Be or Not to Be: Alicante-8, a Cluster or Not?

open access: yesThe Astronomical Journal, 2023
Recent surveys have uncovered new young massive clusters that host dozens of red supergiants (RSGs) near the inner Galaxy. However, many of them have still not been fully studied. Using Very Large Telescope/X-shooter near-infrared spectra, we present the
Randa Asa’d   +5 more
doaj   +1 more source

Massive Young Clusters in the Disk of M31 [PDF]

open access: yesThe Astronomical Journal, 2005
Submitted for publication in the Astronomical Journal.
Fusi Pecci, F.   +5 more
openaire   +3 more sources

From the Top Down and Back Up Again: Star Cluster Structure from Hierarchical Star Formation [PDF]

open access: yes, 2018
Young massive star clusters spanning $\sim 10^4 - 10^8 M_\odot$ in mass have been observed to have similar surface brightness profiles. Recent hydrodynamical simulations of star cluster formation have also produced star clusters with this structure.
Boylan-Kolchin, Michael   +6 more
core   +2 more sources

A high fraction of Be stars in young massive clusters: evidence for a large population of near-critically rotating stars [PDF]

open access: yes, 2016
Recent photometric analysis of the colour-magnitude diagrams (CMDs) of young massive clusters (YMCs) have found evidence for splitting in the main sequence and extended main sequence turn-offs, both of which have been suggested to be caused by stellar ...
N. Bastian   +9 more
semanticscholar   +1 more source

HST FUV Spectroscopy of Super Star Cluster A in the Green Pea Analog Mrk 71: Revealing the Presence of Very Massive Stars

open access: yesThe Astrophysical Journal, 2023
Mrk 71 is a low-metallicity ( Z = 0.16 Z _☉ ) starburst region in the local dwarf galaxy NGC 2366, hosting two super star clusters (SSCs A and B), and it is recognized as a Green Pea (GP) analog with SSC A responsible for the GP properties.
Linda J. Smith   +12 more
doaj   +1 more source

Massive White Dwarfs in Young Star Clusters [PDF]

open access: yesThe Astrophysical Journal, 2021
Abstract We have carried out a search for massive white dwarfs (WDs) in the direction of young open star clusters using the Gaia DR2 database. The aim of this survey was (1) to provide robust data for new and previously known high-mass WDs regarding cluster membership, (2) to highlight WDs previously included in the initial final mass ...
Harvey B. Richer   +8 more
openaire   +3 more sources

Comparing Young Massive Clusters and their Progenitor Clouds in the Milky Way [PDF]

open access: yes, 2016
Young massive clusters (YMCs) have central stellar mass surface densities exceeding $10^{4} M_{\odot} pc^{-2}$. It is currently unknown whether the stars formed at such high (proto)stellar densities.
D. Walker   +7 more
semanticscholar   +1 more source

Searching for globular cluster-like abundance patterns in young massive clusters - II. Results from the Antennae galaxies [PDF]

open access: yes, 2017
The presence of multiple populations (MPs) with distinctive light element abundances is a widespread phenomenon in clusters older than 6 Gyr. Clusters with masses, luminosities, and sizes comparable to those of ancient globulars are still forming today ...
C. Lardo   +3 more
semanticscholar   +1 more source

Stellar-mass black holes in young massive and open stellar clusters – V. comparisons with LIGO-Virgo merger rate densities [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2020
I study the contribution of young massive star clusters (YMCs) and open star clusters (OCs) to the present day, intrinsic merger rate density of dynamically assembled binary black holes (BBHs).
S. Banerjee
semanticscholar   +1 more source

Universal Upper End of the Stellar Initial Mass Function in the Young and Compact LEGUS Clusters

open access: yesThe Astrophysical Journal, 2023
We investigate the variation in the upper end of the stellar initial mass function (uIMF) in 375 young and compact star clusters in five nearby galaxies within ∼5 Mpc. All the young stellar clusters (YSCs) in the sample have ages ≲ 4 Myr and masses above
Dooseok Escher Jung   +23 more
doaj   +1 more source

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