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The recent observation of gravitational waves and light produced by colliding neutron stars didn't just provide scientists with a transformative look at a rare cosmic event -- it provided an important...
Primordial Black Holes May Have Helped to Forge Heavy Elements（图）
Primordial Black Holes Forge Heavy Elements
2017/9/4
Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis.As the...
Atomic data for neutron-capture elements II. Photoionization and recombination properties of low-charge krypton ions
atomic data - atomic processes - HII regions - nucleosynthesis, abundances - planetary nebulae: general - stars:evolution
2011/10/12
We present multi-configuration Breit-Pauli distorted-wave photoionization (PI) cross sections and radiative recombination (RR) and dielectronic recombination (DR) rate coefficients for the first six k...
The First Kepler Mission Planet Confirmed With The Hobby-Eberly Telescope: Kepler-15b, a Hot Jupiter Enriched In Heavy Elements
Hot Jupiter Enriched Heavy Elements Planet Confirmed
2011/10/9
We report the discovery of Kepler-15b, a new transiting exoplanet detected by NASA's Kepler mission. The transit signal with a period of 4.94 days was detected in the quarter 1 (Q1) Kepler photometry....
Nuclear astrophysics: the unfinished quest for the origin of the elements
Nuclear astrophysics:unfinished quest origin elements
2011/10/8
Half a century has passed since the foundation of nuclear astrophysics. Since then, this discipline has reached its maturity. Today, nuclear astrophysics constitutes a multidisciplinary crucible of kn...
Study of isotopic fractions and abundances of the neutron-capture elements in HD 175305
isotopic fractions the neutron-capture elements
2011/1/10
The chemical abundances of metal-poor stars are excellent sources of information for setting new constraints on models of Galactic chemical evolution at low metallicities. In this paper we present an ...
Solar System Abundances of the Elements
Solar and Stellar Astrophysics (astro-ph.SR) Earth and Planetary Astrophysics (astro-ph.EP)
2011/1/4
Representative abundances of the chemical elements for use as a solar abundance standard in astronomical and planetary studies are summarized. Updated abundance tables for solar system abundances base...
Variations in the axisymmetric transport of magnetic elements on the Sun: 1996-2010
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/27
We measure the axisymmetric transport of magnetic flux on the Sun by cross-correlating narrow strips of data from line-of-sight magnetograms obtained at a 96-minute cadence by the MDI instrument on th...
Extreme Enhancements of r-process Elements in the Cool Metal-Poor Main-Sequence Star SDSS J2357-0052
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We report the discovery of a cool metal-poor, main-sequence star exhibiting large excesses of r-process elements. This star is one of two newly discovered cool subdwarfs (effective temperatures of 500...
Lithium and proton-capture elements in Globular Cluster dwarfs: the case of 47 Tuc
Stars abundances Stars Individual Population II- (Galaxy:) globular clusters
2010/3/9
Previous surveys in a few metal-poor Globular Clusters (GCs) showed that the determination of abundances for Li and proton-capture elements offers a key tool to address the intra-cluster pollution sce...
Calcium and light-elements abundance variations from high resolution spectroscopy in globular clusters
abundances stars evolution globular clusters general
2010/3/8
We use abundances of Ca, O, Na, Al from high resolution UVES spectra of 200 red giants in 17 globular clusters (GCs) to investigate the correlation found by Lee et al. (2009) between chemical enrichme...
COMPUTATION OF ASTEROID PROPER ELEMENTS ON THE GRID
Minor planets, asteroids Methods: data analysis
2010/10/29
A procedure of gridification of the computation of asteroid proper orbital elements is described. The need to speed up the time consuming computations and make them more e±cient is justified by the la...
Orbital elements for bu 1240 ab. nature of the c and d components
Orbital elements c and d components bu 1240 ab
2009/7/10
Orbital elements for bu 1240 ab. nature of the c and d components。
The helium and heavy elements enrichment of the galactic disk
The helium galactic disk elements enrichment
2009/7/10
The helium and heavy elements enrichment of the galactic disk。
UV Observations of Neutron Capture Elements in Planetary Nebulae
UV Observations Planetary Nebulae Neutron Capture Elements
2009/6/9
UV Observations of Neutron Capture Elements in Planetary Nebulae。