Results 11 to 20 of about 1,207,219 (318)

Evidence for quark-matter cores in massive neutron stars [PDF]

Nature Physics, 2019
The theory governing the strong nuclear force—quantum chromodynamics—predicts that at sufficiently high energy densities, hadronic nuclear matter undergoes a deconfinement transition to a new phase of quarks and gluons1.
Eemeli Annala, Tyler Gorda, A. Kurkela, J. Nättilä, A. Vuorinen   +4 more
semanticscholar   +3 more sources

Enhanced production of ⁶⁰Fe in massive stars. [PDF]

Nat Commun
Spyrou A, Richman D, Couture A, Fields CE, Liddick SN, Childers K, Crider BP, DeYoung PA, Dombos AC, Gastis P, Guttormsen M, Hermansen K, Larsen AC, Lewis R, Lyons S, Midtbø JE, Mosby S, Muecher D, Naqvi F, Palmisano-Kyle A, Perdikakis G, Prokop C, Schatz H, Smith MK, Sumithrarachchi C, Sweet A.   +25 more
europepmc   +3 more sources

MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): PLANETS, OSCILLATIONS, ROTATION, AND MASSIVE STARS [PDF]

, 2013
We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESAstar.
B. Paxton, M. Cantiello, P. Arras, L. Bildsten, E. Brown, A. Dotter, C. Mankovich, M. Montgomery, D. Stello, F. Timmes, R. Townsend   +10 more
semanticscholar   +1 more source

Yellow Supergiants and Post-red Supergiant Evolution in the Large Magellanic Cloud

The Astronomical Journal, 2023
The empirical evidence for an upper-mass limit for the red supergiant (RSG) progenitors of the Type II-P SNe at about 18 MSun, raises questions about the fate of the most luminous, most massive RSGs.
Roberta M. Humphreys, Terry J. Jones, John C. Martin   +2 more
doaj   +1 more source

Presupernova Evolution and Explosive Nucleosynthesis of Rotating Massive Stars in the Metallicity Range −3 ≤ [Fe/H] ≤ 0 [PDF]

Astrophysical Journal Supplement Series, 2018
We present a new grid of presupernova models of massive stars extending in mass between 13 and 120 , covering four metallicities (i.e., [Fe/H] = 0, −1, −2, and −3) and three initial rotation velocities (i.e., 0, 150, and 300 km s−1).
M. Limongi, A. Chieffi
semanticscholar   +1 more source

Early-forming Massive Stars Suppress Star Formation and Hierarchical Cluster Assembly

The Astrophysical Journal, 2023
Feedback from massive stars plays an important role in the formation of star clusters. Whether a very massive star is born early or late in the cluster formation timeline has profound implications for the star cluster formation and assembly processes. We
Sean C. Lewis, Stephen L. W. McMillan, Mordecai-Mark Mac Low, Claude Cournoyer-Cloutier, Brooke Polak, Martijn J. C. Wilhelm, Aaron Tran, Alison Sills, Simon Portegies Zwart, Ralf S. Klessen, Joshua E. Wall   +10 more
doaj   +1 more source

Massive Hypervelocity Runaway Stars in the Large Magellanic Cloud

The Astrophysical Journal, 2023
Since the hypervelocity stars were discovered in the Milky Way, various mechanisms have been proposed to explain these runaway stars. Up to now, however, the dominant ejected mechanism of hypervelocity stars is still unclear.
Zehao Lin, Ye Xu, Chaojie Hao, Yingjie Li, Dejian Liu, Shuaibo Bian   +5 more
doaj   +1 more source

Massive Stars as the Radiant Queens of the Universe—The Case of ζ Puppis

Universe, 2022
Since the Cosmic Dawn, massive stars have been playing a crucial role as the chemical recycling engines of galaxies that enable the birth of new stars and planetary systems, not only through the strong winds that they exhibit during their relatively ...
Tahina Ramiaramanantsoa, Anthony F. J. Moffat   +1 more
doaj   +1 more source

An excess of massive stars in the local 30 Doradus starburst [PDF]

Science, 2018
Observing more massive stars The number of stars that form at each mass is known as the initial mass function (IMF). For most masses, the IMF follows a power-law distribution, first determined by Edwin Salpeter in 1955. Schneider et al. used observations
F. Schneider, H. Sana, C. Evans, J. Bestenlehner, J. Bestenlehner, N. Castro, L. Fossati, G. Gräfener, N. Langer, O. H. Ramírez-Agudelo, C. Sabín-Sanjulián, S. Simón-Díaz, S. Simón-Díaz, F. Tramper, P. Crowther, A. D. Koter, A. D. Koter, S. D. Mink, P. Dufton, María García, M. Gieles, V. Hénault-Brunet, V. Hénault-Brunet, A. Herrero, A. Herrero, R. Izzard, V. Kalari, D. Lennon, J. M. Apellániz, N. Markova, F. Najarro, P. Podsiadlowski, P. Podsiadlowski, J. Puls, W. Taylor, J. V. Loon, J. Vink, C. Norman, C. Norman   +38 more
semanticscholar   +1 more source

Nucleonic Direct Urca Processes and Cooling of the Massive Neutron Star by Antikaon Condensations

Advances in Astronomy, 2020
Nucleonic direct Urca processes and cooling of the massive neutron stars are studied by considering antikaon condensations. Calculations are performed in the relativistic mean field and isothermal interior approximations.
Yan Xu, Wen Bo Ding, Cheng Zhi Liu, J. L. Han   +3 more
doaj   +1 more source