Results 51 to 60 of about 2,066,093 (377)
The Astrophysical Journal, 2023 We characterize the optical counterparts to the compact X-ray source population within the nearby spiral galaxy M81 using multiband Hubble Space Telescope (HST) imaging data.
Qiana Hunt +4 more
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The age of globular clusters [PDF]
Physics Reports, 2000 latex (using elsart macro for Physics Reports), 16 pages including 4 figures.
openaire +4 more sources
Dynamical Substructures of Galactic Globular Clusters I. M5 [PDF]
Journal of Astronomy and Space Sciences, 2004 CCD images to study the dynamical substructure of the globular cluster M5. We investigate the radial variation of ellipticities and position angles using the stellar photometry and the IRAF ellipse task.
Jongwhan Rhee, Young-Jong Sohn
doaj +1 more source
Constraining Co-Varying Coupling Constants from Globular Cluster Age
Universe, 2023 Equations governing the evolution of a star involve multiple coupling constants. Thus, the time it spends as a main-sequence star can be expected to depend on whether or not such constants vary over the time scale of stellar evolution.
Rajendra P. Gupta
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APOGEE chemical abundances of globular cluster giants in the inner Galaxy [PDF]
, 2016 We report chemical abundances obtained by Sloan Digital Sky Survey (SDSS)-III/Apache Point Observatory Galactic Evolution Experiment for giant stars in five globular clusters located within 2.2 kpc of the Galactic Centre.
R. Schiavon +29 more
semanticscholar +1 more source
The WAGGS project - I. The WiFeS Atlas of Galactic Globular cluster Spectra [PDF]
, 2017 We present the WiFeS Atlas of Galactic Globular cluster Spectra, a library of integrated spectra of Milky Way and Local Group globular clusters. We used the WiFeS integral field spectrograph on the Australian National University 2.3 m telescope to ...
C. Usher +11 more
semanticscholar +1 more source
The Origin of Globular Clusters [PDF]
Symposium - International Astronomical Union, 1988 The purpose of this article is to review some recent attempts to understand the origin of globular clusters. To put this in perspective, it may help to recall the analogous problem of the origin of galaxies. This splits into two parts. First, given a proto-galaxy with a specified mass and radius, how does it collapse, form stars and settle into a state
S. Michael Fall, Martin J. Rees
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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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CHEMICAL TAGGING IN THE SDSS-III/APOGEE SURVEY: NEW IDENTIFICATIONS OF HALO STARS WITH GLOBULAR CLUSTER ORIGINS [PDF]
, 2016 We present new identifications of five red giant stars in the Galactic halo with chemical abundance patterns that indicate they originally formed in globular clusters.
S. Martell +8 more
semanticscholar +1 more source
Motions of Globular Clusters [PDF]
Symposium - International Astronomical Union, 1995 Absolute proper motions of seven globular clusters have been determined with respect to extragalactic references and with accuracies of ∼ 1 mas/yr. Derived quantities and qualitative implications are described.
M. Geffert +3 more
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