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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...
Chemical trail on Titan may be key to prebiotic conditions
Chemical trail Titan prebiotic conditions
2016/7/15
NASA’s Cassini and Huygens missions have provided a wealth of data about chemical elements found on Saturn’s moon Titan, and Cornell scientists have uncovered a chemical trail that suggests prebiotic ...
The Chemical Evolution of Narrow Emission Line Galaxies: the Key to their Formation Processes
galaxy: activity galaxy: formation galaxy: chemical evolution
2011/10/20
Using the largest sample of narrow emission line galaxies available so far, we show that their spectral characteristics are correlated with different physical parameters, like the chemical abundances,...
Detailed Chemical Abundances of Four Stars in the Unusual Globular Cluster, Palomar 1
Detailed Chemical Abundance Unusual Globular Cluster Palomar
2011/10/17
Detailed chemical abundances for twenty one elements are presented for four red giants in the anomalous outer halo globular cluster Palomar 1 ($R_{\rm{GC}} = 17.2$ kpc, $Z=3.6$ kpc) using high-resolut...
A Chemical Abundance Study of 10 Open Clusters Based on WIYN-Hydra Spectroscopy
Chemical Abundance Study Clusters Based WIYN-Hydra Spectroscopy
2011/10/12
We present a detailed chemical abundance study of evolved stars in 10 open clusters based on Hydra multi-object echelle spectra obtained with the WIYN 3.5m telescope. From an analysis of both equivale...
Chemical abundance analysis of the Open Clusters Berkeley 32, NGC 752, Hyades and Praesepe
Stars: abundances – Galaxy: disc – Galaxy: open clusters and associations: individual: NGC 752 Hyades Berkeley 32 Preasepe (M 44)
2011/10/8
Context. Open clusters are ideal test particles to study the chemical evolution of the Galactic disc. However the existing high-resolution abundance determinations, not only of [Fe/H], but also of oth...
The delayed contribution of low and intermediate mass stars to chemical galactic enrichment：an analytical approach
stars analytical approach chemical galactic enrichment
2009/7/10
The delayed contribution of low and intermediate mass stars to chemical galactic enrichment：an analytical approach。
The chemical composition of the galactic H II regions M8 and M17. A revision based on deep vlt echelle spectrophotometry
chemical composition vlt echelle spectrophotometry galactic H II
2009/7/9
The chemical composition of the galactic H II regions M8 and M17. A revision based on deep vlt echelle spectrophotometry。
A Chemical Abundance Study of three RHB and two RGB stars in NGC 6637 (M69)
Chemical two RGB stars three RHB NGC 6637
2009/7/1
A Chemical Abundance Study of three RHB and two RGB stars in NGC 6637 (M69)。
Effects of chemical and energy feedback in the formation of galaxies
galaxies energy feedback chemical
2009/6/26
Effects of chemical and energy feedback in the formation of galaxies。
Chemical abundances in the galactic bulge：evidence for a fast enrichment
galactic bulge fast enrichment Chemical abundances
2009/6/25
Chemical abundances in the galactic bulge：evidence for a fast enrichment。
Chemical evolution of galaxies。
Photoionization models for planetary nebulae with inhomogeneous chemical composition
Photoionization models chemical composition planetary nebulae
2009/6/11
Photoionization models for planetary nebulae with inhomogeneous chemical composition。
Dark Matter and the Chemical Evolution of Irregular Galaxies
Dark Matter Irregular Galaxies Chemical Evolution
2009/6/5
Dark Matter and the Chemical Evolution of Irregular Galaxies。
The Chemical Evolution of Dynamically Hot Galaxies
Chemical Evolution Dynamically Hot Galaxies
2009/6/5
The Chemical Evolution of Dynamically Hot Galaxies。