中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共10条，第1-10条 帮助

条数/页： 排序方式：
Galactic Interstellar Sulfur Isotopes: A Radial(32)S/S-34 Gradient? 期刊论文  OAI收割
ASTROPHYSICAL JOURNAL, 2020, 卷号: 899, 期号: 2, 页码: 145
作者:  Yu, H. Z.;  Zhang, J. S.;  Henkel, C.;  Yan, Y. T.;  Liu, W.
  |  收藏  |  浏览/下载：60/0  |  提交时间：2021/04/01
Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文  OAI收割
Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158
作者:  HXMT
  |  收藏  |  浏览/下载：48/0  |  提交时间：2022/02/08
Insight-HXMT  Geant4 simulation  Background observation  Astrophysics  - Instrumentation and Methods for Astrophysics  Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation  (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.  
LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC): the second release of value-added catalogues 期刊论文  OAI收割
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 卷号: 467, 期号: 2, 页码: 1890-1914
作者:  Xiang, M. -S.;  Liu, X. -W.;  Yuan, H. -B.;  Huo, Z. -Y.;  Huang, Y.
收藏  |  浏览/下载：33/0  |  提交时间：2017/05/25
Estimating stellar atmospheric parameters, absolute magnitudes and elemental abundances from the LAMOST spectra with Kernel-based principal component analysis 期刊论文  OAI收割
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 卷号: 464, 期号: 3, 页码: 3657-3678
作者:  Xiang, M. -S.;  Liu, X. -W.;  Shi, J. -R.;  Yuan, H. -B.;  Huang, Y.
收藏  |  浏览/下载：23/0  |  提交时间：2017/05/25
The LAMOST stellar parameter pipeline at Peking University-LSP3 期刊论文  OAI收割
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 卷号: 448, 期号: 1, 页码: 822-854
作者:  Xiang, M. S.;  Liu, X. W.;  Yuan, H. B.;  Huang, Y.;  Huo, Z. Y.
收藏  |  浏览/下载：14/0  |  提交时间：2016/11/11
Metal enrichment via ram pressure stripping in the IGM of the compact galaxy group RGH 80 期刊论文  OAI收割
RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2010, 卷号: 10, 期号: 4, 页码: 301-308
作者:  Cui, Hai-Juan;  Xu, Hai-Guang;  Gu, Jun-Hua;  Wang, Jing-Ying;  Gu, Li-Yi
收藏  |  浏览/下载：26/0  |  提交时间：2015/08/19
Metal enrichment via ram pressure stripping in the IGM of the compact galaxy group RGH 80 期刊论文  OAI收割
RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2010, 卷号: 10, 期号: 4, 页码: 301
作者:  Cui HaiJuan;  Xu HaiGuang;  Gu JunHua;  Wang JingYing;  Gu LiYi
  |  收藏  |  浏览/下载：15/0  |  提交时间：2021/12/06
A principal component analysis of the equivalent widths of spectral lines of star cluster's 期刊论文  OAI收割
CHINESE ASTRONOMY AND ASTROPHYSICS, 2002, 卷号: 26, 期号: 4, 页码: 432-441
作者:  Li, C;  Kong, X;  Cheng, FZ
收藏  |  浏览/下载：12/0  |  提交时间：2017/07/05
History of star formation and chemical enrichment in the Milky Way disk 期刊论文  OAI收割
CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS, 2002, 卷号: 2, 期号: 3, 页码: 226-247
作者:  Chang, RX;  Shu, CG;  Hou, JL
收藏  |  浏览/下载：27/0  |  提交时间：2010/11/08
Prediction for the first generation stars from a Galactic halo chemical evolution model with Miller-Scalo initial mass function 期刊论文  OAI收割
ASTRONOMY & ASTROPHYSICS, 2001, 卷号: 367, 期号: 1, 页码: 277-281
作者:  Lu, Y;  Zhao, G;  Deng, LC;  Cen, MR;  Liang, YC
收藏  |  浏览/下载：12/0  |  提交时间：2017/06/28