Results 31 to 40 of about 10,737,866 (298)
The Metallicity Variations Along the Chromosome Maps: The Globular Cluster 47 Tucanae
The Astrophysical Journal, 2023 The “chromosome maps” (ChMs) of globular clusters (GCs) have revealed that these ancient structures are inhomogeneous in metallicity in various ways and in different natures.
A. F. Marino +13 more
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Detailed Chemical Abundances of Stars in the Outskirts of the Tucana II Ultrafaint Dwarf Galaxy
The Astronomical Journal, 2023 We present chemical abundances and velocities of five stars between 0.3 and 1.1 kpc from the center of the Tucana II ultrafaint dwarf galaxy (UFD) from high-resolution Magellan/MIKE spectroscopy. We find that every star is deficient in metals (−3.6 < [Fe/
Anirudh Chiti +8 more
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Radial velocities of population II binary stars. I.
Astronomische Nachrichten, 2002 Here we publish the second list of radial velocities for 91 Hipparcos stars, mostly high transverse velocity binaries without previous radial velocity measurements. The measurements of radial velocities are done with a CORAVEL-type radial velocity spectrometer with an accuracy better than 1 km/s.
Bartkevicius, A., Sperauskas, J.
openaire +2 more sources
Spectroscopic survey of Kepler stars – II. FIES/NOT observations of A- and F-type stars
, 2017 We have analysed high-resolution spectra of 28 A and 22 F stars in the Kepler field, observed using the Fibre-Fed Échelle Spectrograph at the Nordic Optical Telescope. We provide spectral types, atmospheric parameters and chemical abundances for 50 stars.
S. J. Murphy +21 more
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, 1996 The goal of the Population Council\u27s “Investigación Operacional en Planificación Familiar y Atención Materno-Infantil para América Latina y el Caribe” (INOPAL) program was to conduct operations research and provide technical assistance to improve the ...
Population Council
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Tracing ωCentauri’s origins: Spatial and chemical signatures of its formation history
Astronomy & AstrophysicsωCentauri (ωCen), with its unmatched chemical complexity, is the most enigmatic Galactic globular cluster (GC). We combine photometric and spectroscopic catalogs to identify distinct stellar populations within ωCen, investigate their spatial distribution
Dondoglio E. +10 more
doaj +1 more source
Radial-velocity measurements of subdwarf B stars [PDF]
, 2011 Subdwarf B (sdB) stars are hot, subluminous stars which are thought to be core-helium burning with thin hydrogen envelopes. The mechanism by which these stars lose their envelopes has been controversial, but it has been argued that binary star ...
Copperwheat, CM +14 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Loneliness is associated with adverse physical and mental health outcomes and remains understudied in children and adolescents undergoing cancer therapy. Pediatric oncology patients may be at increased risk due to medical isolation and disruption of social networks.
Charlotte N. Stahlfeld +5 more
wiley +1 more source
Is there a Population II analogy to the F star lithium dip? [PDF]
Proceedings of the National Academy of Sciences, 1997 Observers have found a small number of lithium-depleted halo stars in the temperature range of the Spite plateau. The current status of the mass-loss hypothesis for producing the observed lithium dip in Population (Pop) I stars is briefly discussed and extended to Pop II stars as a possible explanation for these halo objects. Based
D S, Dearborn, D N, Schramm
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Gravitoastronomy with neutron stars [PDF]
, 2004 Recent advances in gravitational wave detectors mean that we can start to make astrophysically important statements about the physics of neutron stars based on observed upper limits to their gravitational luminosity.
Woan, G., Graham Woan
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