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Comet 67P/Churyomov-Gerasimenko – arguably the most-studied comet in history – has yielded a cosmic surprise: It emits molecular oxygen drawn from its nucleus.
Caltech Chemical Engineer Explains Oxygen Mystery on Comets
Caltech Chemical Engineer Oxygen Mystery Comets
2017/7/20
A Caltech chemical engineer who normally develops new ways to fabricate microprocessors in computers has figured out how to explain a nagging mystery in space—why comets expel oxygen gas, the same gas...
UCLA astronomers make first accurate measurement of oxygen in distant galaxy
UCLA astronomers first accurate measurement of oxygen galaxy
2016/8/11
UCLA astronomers have made the first accurate measurement of the abundance of oxygen in a distant galaxy. Oxygen, the third-most abundant chemical element in the universe, is created inside stars and ...
X-Ray Absorption Spectroscopy of the Multiphase Interstellar Medium: Oxygen and Neon Abundances
ISM 4U 1820–303
2014/12/24
X-ray absorption spectroscopy provides a powerful tool in determining the metal abundances in various phases of the interstellar medium (ISM). We present a case study of the sight line toward 4U 1820-...
OPTICAL SPECTROSCOPY AND NEBULAR OXYGEN ABUNDANCES OF THE SPITZER/SINGS GALAXIES
galaxy star formation
2014/12/22
We present intermediate-resolution optical spectrophotometry of 65 galaxies obtained in support of the Spitzer Infrared Nearby Galaxies Survey (SINGS). For each galaxy we obtain a nuclear, circumnucle...
Revision of the 15N(p,γ)16O reaction rate and oxygen abundance in H-burning zones
physical data processes: nuclear reactions abundances
2011/10/13
The NO cycle takes place in the deepest layer of a H-burning core or shell, when the temperature exceeds T {\simeq} 30 {\cdot} 106 K. The O depletion observed in some globular cluster giant stars, alw...
Stark Broadening of Carbon and Oxygen Lines in Hot DQ White Dwarf Stars: Recent Results and Applications
stars: atmospheric parameters – broadening: Stark
2011/10/9
White dwarf stars are traditionally found to have surface compositions made primarily of hydrogen or helium. However, a new family has recently been uncovered, the so-called Hot DQ white dwarfs, which...
In previous studies, we examined turbulence-flame interactions in carbon-burning thermonuclear flames in Type Ia supernovae. In this study, we consider turbulence-flame interactions in the trailing ox...
Evolution of the Solar Nebula. IX. Gradients in the Spatial Heterogeneity of the Short-Lived Radioisotopes $^{60}$Fe and $^{26}$Al and the Stable Oxygen Isotopes
Evolution Solar Nebula IX. Gradients Spatial Heterogeneity Short-Lived Stable Oxygen Isotopes
2011/9/27
Short-lived radioisotopes (SLRI) such as $^{60}$Fe and $^{26}$Al were likely injected into the solar nebula in a spatially and temporally heterogeneous manner. Marginally gravitationally unstable (MGU...
Collateral Effects on Solar Nebula Oxygen Isotopes due to Injection of 26Al by a Nearby Supernova
Solar Nebula Oxygen Isotopes 26Al Nearby Supernova
2011/1/10
Injection of material from a core-collapse supernova into the solar system's already-formed disk is one proposed mechanism for producing the short-lived radionuclides, such as 26Al and 41Ca, inferred ...
Spectroscopic observations of a sample of dwarf spirals galaxies. I.Oxygen abundances
Spectroscopic observations dwarf spirals galaxies
2011/1/13
The oxygen abundances for four dwarf spiral galaxies have been determined using long-slit spectroscopy. The abundances of these galaxies have not previously reported in the literature. Several HII reg...
Oxygen Abundance Methods in SDSS: View from Modern Statistics
Galaxies abundance starburst—stars formation
2010/9/15
Our purpose is to find which is the most reliable one among various oxygen abundance determination methods.We will test the validity of several different oxygen abundance determination methods using m...
Cas A：The Bright X-ray Knots and Oxygen Emission。
Carbon and oxygen galactic gradients。
Modeling of oxygen-neon dominated accretion disks in Ultracompact x-ray binaries：4u 1626-67
oxygen-neon disks x-ray binaries
2009/6/17
Modeling of oxygen-neon dominated accretion disks in Ultracompact x-ray binaries：4u 1626-67。