Results 31 to 40 of about 36,679 (341)
The Supersonic Project: Star Formation in Early Star Clusters without Dark Matter
The Astrophysical Journal Letters, 2023 The formation mechanism of globular clusters (GCs) has long been debated by astronomers. It was recently proposed that supersonically induced gas objects (SIGOs)–which formed in the early Universe due to the supersonic relative motion of baryons and dark
William Lake +9 more
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Variable Stars and Evolution in Globular Clusters [PDF]
Symposium - International Astronomical Union, 1973 Traditionally, cluster variables have been used as distance indicators and have in this sense played an important role in our understanding of stellar evolution. In particular, the determination of the distance moduli of globular clusters and of the absolute magnitude of the main sequence turnoff, thus yielding the ages of the cluster, have relied ...
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Multiple Populations in Low-mass Globular Clusters: Eridanus
The Astrophysical Journal, 2023 Multiple populations (MPs), characterized by variations in light elemental abundances, have been found in stellar clusters in the Milky Way, Magellanic Clouds, as well as several other dwarf galaxies.
Yue Wang +7 more
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Axial Rotation of Globular Star Clusters [PDF]
Nature, 1936 THE axial rotation of globular star clusters has not yet been measured, so far as we know, from the differences of radial velocities at their opposite edges, but indirect evidence of their rotation is the observed ellipticity. The oblateness e of a rotating body depends on the ratio of the centrifugal force to the gravity at the star's surface ; that ...
Zdeněk Kopal, Hubert Slouka
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Variable stars in the globular cluster M 13 [PDF]
Astronomy & Astrophysics, 2003 10 pages, 9 figures, 5 tables, accepted for publication in ...
Andrzej Pigulski +2 more
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On the disc and halo of the milky way through a study of star clusters [PDF]
Serbian Astronomical Journal, 2000 The subject is the metallicity and the correlation between the metallicity and spatial distribution of star clusters of the Milky Way. The open star clusters are confirmed as good indicators for the population of the galactic disc, whereas the globular ...
Nagl M.
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Did Globular Clusters Reionize the Universe? [PDF]
, 2002 A problem still unsolved in cosmology is the identification of the sources of radiation able to reionize HI in the intergalactic medium (IGM) by z~6. Theoretical works and observations seem to indicate that the fraction, f_esc, of HI ionizing radiation ...
Becker +44 more
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Globular cluster formation triggered by the initial starburst in galaxy formation [PDF]
, 1999 We propose and investigate a new formation mechanism for globular clusters in which they form within molecular clouds that are formed in the shocked regions created by galactic winds driven by successive supernova explosions shortly after the initial ...
IKEUCHI Satoru +3 more
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Variable Stars in Galactic Globular Clusters [PDF]
The Astronomical Journal, 2001 45 pages, 10 figures, to be published in AJ November ...
John C. L. Wang +9 more
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r-process Abundance Patterns in the Globular Cluster M92
The Astrophysical Journal, 2023 Whereas light-element abundance variations are a hallmark of globular clusters, there is little evidence for variations in neutron-capture elements. A significant exception is M15, which shows a star-to-star dispersion in neutron-capture abundances of at
Evan N. Kirby +2 more
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