Abundance gradients in the galactic disk

  title={Abundance gradients in the galactic disk},
  author={Chenzhou Cui and Yuqing Chen and Gang Zhao and Yongheng Zhao},
  journal={arXiv: Astrophysics of Galaxies},
The relationship between abundances and orbital parameters for 235 F- and G-type intermediate- and low- mass stars in the Galaxy is analyzed. We found that there are abundance gradients in the thin disk in both radial and vertical directions (-0.116 dex/kpc and -0.309 dex/kpc respectively). The gradients appear to be flatter as the Galaxy evolves. No gradient is found in the thick disk based on 18 thick disk stars. These results indicate that the ELS model is mainly suitable for the evolution… Expand
7 Citations

Figures and Tables from this paper

Long-term trend and abrupt events of the Holocene Asian monsoon inferred from a stalagmite δ10O record from Shennongjia in Central China
A high-resolution oxygen-isotope record from a thorium-uranium-dated stalagmite from Shanbao Cave at Shennongjia reflects variations in the amount of monsoon precipitation for the period from 11.5 toExpand
Basin-wide Holocene environmental changes in the marginal area of the Asian monsoon, northwest China
In arid regions, because of spatial variability, using single climate records is difficult to reconstruct the past climate change for the drainage basins. Holocene environmental records wereExpand
Detection of permafrost sensitivity of the Qinghai–Tibet railway using satellite radar interferometry
Climate change and human involvement are changing the dynamics of permafrost environments, with potential impact on the safety and stability of infrastructure. The Qinghai–Tibet Railway (QTR) hasExpand
Experimental study and statistical theory of creep behavior of warm frozen silt
To investigate the soil parameters and stochastic mechanical characteristics of warm frozen silt, a series of triaxial compression tests were conducted on frozen silt at the temperature of -1.5°CExpand
A fractional order creep constitutive model of warm frozen silt
Abstract A series of triaxial creep tests were conducted on warm frozen silts extracted from Qinghai–Tibet Plateau at temperature of −1.5 °C under confining pressures of 0.5, 1.0, and 2.0 MPa,Expand
Long-term thermal regimes of the Qinghai-Tibet Railway embankments in plateau permafrost regions
Ten years of ground temperature data (2003–2013) indicate that the long-term thermal regimes within embankments of the Qinghai-Tibet Railway (QTR) vary significantly with different embankmentExpand
Hierarchical silver nanodendrites: One-step preparation and application for SERS
Abstract Without using any other reducing reagents or templates, a one-step approach for synthesizing dendritic Ag nanostructure by the treatment of sliver ions only in the presence of silk fibroinExpand


A determination of the thick disk chemical abundance distribution: Implications for galaxy evolution
We present a determination of the thick disk iron abundance distribution obtained from an in situ sample of F/G stars. These stars are faint, 15 less than or approximately = V less than orExpand
Statistical analysis of Fe abundances gradients in the Galaxy
Using the high precision data of the proper motions and parallaxes from Hipparcos catalogue, we obtained the orbital parameters of 1302 stars in the Galaxy based on the mass distribution modelExpand
The Galactic Oxygen Abundance Gradient
We have previously published medium- to high-resolution spectroscopic observations of early B-type main-sequence objects, lying in 18 young, stellar clusters and associations or the general diskExpand
Abundance gradients from Planetary Nebulae in the galactic disk (Invited Review)
Radial abundance gradients in the disks of spiral galaxies are made evident from observations of ionized nebulae (HII regions, planetary nebulae, and SNRs) and stars. They have been observed forExpand
The Galactic metallicity gradient
We have previously published intermediate to high resolution spectroscopic observations of approximately 80 early B-type main-sequence stars situated in 19 Galactic open clus- ters/associations withExpand
A comparison of oxygen and nitrogen abundances in young clusters and associations and in the interstellar gas
We have used previously published observations of main-sequence B-type stars lying in 11 young stellar clusters and associations to estimate non-LTE abundances of oxygen and nitrogen overExpand
Compositions of halo clusters and the formation of the galactic halo
A method of abundance determination based on reddening-independent properties of low-resolution spectral scans is described and applied to 177 red giants in 19 globular clusters, most of which are atExpand
Nearby stars of the Galactic disk and halo. III.
High-resolution spectroscopic observations of about 150 nearby stars or star systems are presented and discussed. The study of these and another 100 objects of the previous papers of this seriesExpand
On the Galactic disc age–metallicity relation
A comparison is made between the age–metallicity relations obtained from four different types of studies: F and G stars in the solar neighbourhood, analysis of open clusters, galactic structureExpand
Chemistry and Kinematics in the Solar Neighborhood: Implications for Stellar Populations and for Galaxy Evolution
The immediate Solar neighborhood should be a fair sample of the local Galaxy. However, the chemical abundance distribution of long-lived disk stars very near the Sun contains a factor of five to tenExpand