Results 1 to 10 of about 4,003,229 (276)

Between the Cosmic-Ray “Knee” and the “Ankle”: Contribution from Star Clusters

The Astrophysical Journal
We show that massive, young star clusters may be possible candidates that can accelerate Galactic cosmic rays (CRs) in the range of 10 ^7 –10 ^9 GeV (between the “knee” and “ankle”).
Sourav Bhadra, Satyendra Thoudam, Biman B Nath, Prateek Sharma   +3 more
doaj   +1 more source

The Star Clusters as Links between Galaxy Evolution and Star Formation Project. I. Numerical Method

The Astrophysical Journal
Stellar clusters are critical constituents within galaxies: They are the result of highest-density star formation, and through their spatially and temporally correlated feedback, they regulate their host galaxy evolution.
Marta Reina-Campos, Oleg Y. Gnedin, Alison Sills, Hui Li   +3 more
doaj   +1 more source

Symmetry Breaking in Merging Binary Black Holes from Young Massive Clusters and Isolated Binaries

The Astrophysical Journal, 2023
Properties of the to-date observed binary black hole (BBH) merger events suggest a preference toward spin–orbit aligned mergers. Naturally, this has caused widespread interest and speculations regarding implications on various merger formation channels ...
Sambaran Banerjee, Aleksandra Olejak, Krzysztof Belczynski   +2 more
doaj   +1 more source

Very Massive Stars and High N/O: A Tale of the Nitrogen-enriched Super Star Cluster in the Sunburst Arc

The Astrophysical Journal
The lensed Sunburst Arc ( z = 2.369) hosts a young (∼2–4 Myr), massive ( M _⋆  ∼ 10 ^7 M _⊙ ), compact ( R _eff  ∼ 8 pc) Lyman-continuum leaking super star cluster, which powers a compact (
Yanlong Shi, Liang Dai, Norman Murray, Claire S. Ye, Christopher D. Matzner, Massimo Pascale   +5 more
doaj   +1 more source

Isolated massive star candidates in NGC 4242 with the Galaxy UV Legacy Project

Astronomy & Astrophysics
Context. There is considerable debate about the formation of massive stars, including whether a high-mass star must always form with a population of low-mass stars, or if it can also form in isolation.
Facchini Pietro, Grebel Eva K., Pasquali Anna, Sabbi Elena, Meena Beena, Bajaj Varun, Gallagher III John S., Elmegreen Bruce G., Bianchi Luciana, Adamo Angela, Calzetti Daniela, Cignoni Michele, Crowther Paul A., Eldridge Jan J., Gennaro Mario, Klessen Ralf S., Smith Linda J., Wofford Aida, Zeidler Peter   +18 more
doaj   +1 more source

The Close Binary Properties of Massive Stars across Different Environments within the LMC

The Astrophysical Journal
We analyze 4859 O stars in the third phase of the Optical Gravitational Lensing Experiment photometric survey of the LMC, including 415 eclipsing binaries (EBs).
Maxwell Moe, M. S. Oey, Irene Vargas-Salazar, Kaitlin M. Kratter   +3 more
doaj   +1 more source

FEAST: A NIRSpec/MOS Survey of Emerging Young Star Clusters in NGC 628

The Astrophysical Journal
JWST can pierce through dusty molecular clouds to study the early stages of star formation, where young star clusters are actively driving stellar feedback and still emerging from their natal cloud.
Helena Faustino Vieira, Angela Adamo, Neville Shane, Linda J. Smith, Arjan Bik, Thomas S.-Y. Lai, Alex Pedrini, Leslie K. Hunt, Sean T. Linden, Giacomo Bortolini, Anne S.M. Buckner, Daniela Calzetti, Matteo Correnti, Ana Duarte-Cabral, Kathryn Grasha, Kelsey Johnson, Drew Lapeer, Matteo Messa, Göran Östlin, Linn Roos, Elena Sabbi   +20 more
doaj   +1 more source

OB runaway stars originating in the Vel OB1 association

Astronomy & Astrophysics
Context. OB runaway stars are massive stars moving through interstellar space with a high velocity (up to 200 km s−1). They are produced by dynamical ejections in young massive clusters or by supernova explosions in massive binaries.
Azatyan N., Kaper L., Samsonyan A., Stoop M., Andreasyan D., van den Eijnden J., Nikoghosyan E.   +6 more
doaj   +1 more source

Quantifying Systematic Age Discrepancies in Very Young Star Clusters

The Astrophysical Journal
We infer the ages of three young stellar clusters—NGC 2004, NGC 7419, and NGC 2100—using Stellar Ages, a statistical algorithm designed to infer stellar population properties from color–magnitude diagrams.
Joseph Guzman, Jeremiah W. Murphy, Emma Beasor, Julianne J. Dalcanton, Nathan Smith, Mojgan Aghakhanloo, Benjamin F. Williams, Andrés F. Barrientos   +7 more
doaj   +1 more source

Young massive star clusters as teraelectronvolt emitters: Constraints from H.E.S.S. and LHAASO

Astronomy & Astrophysics
Young massive star clusters (YMSCs) have been proposed as excellent candidates for the main sources of Galactic cosmic rays (CRs) up to the petaelectronvolt range.
Batzofin Rowan, Cristofari Pierre, Egberts Kathrin   +2 more
doaj   +1 more source