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研究人员基于LAMOST数据揭示富钡恒星的起源
在此基础上,研究人员进一步细致分析了它们的C、N、
Mg
、Al、Si等元素的丰度分布模式;并将LAMOST数据与Gaia数据结合,获取和分析了这些恒星在六维相空间的运动学性质。
另有2/3的恒星没有显示出明显的C和N元素增丰,而是呈现出
Mg
,Ti,Ni等元素丰度的异常。其中,
Mg
元素丰度比普通恒星更低,这与高温、中等质量钡元素增丰的恒星情况相似。
天文学家构建深度学习模型估计LAMOST中分辨光谱的恒星参数和元素丰度
对于信噪比大于 10 的LAMOST 中分辨率光谱,其有效温度和表面重力误差水平为119 K和0.17 dex,13 种化学元素[C/H]、 [N/H]、[O/H]、[
Mg
/H]、[Al/H]、[Si/ ...
LAMOST类星体巡天已发现三万多类星体
黑色、 绿色和蓝色分别代表用氢(Hβ)、镁(
Mg
ii)和碳(C iv)发射线得到的黑洞质量。(Jin et al. 2022)。
FAST第十四批科学数据开放
Shifts in Double Neutron Star Systems 35 PT2021_0063 Siwei Zou Searching for 21-cm absorption in
Mg
...
ATLAS empirical stellar library and catalogs
The parameter coverage of ATLAS-A is from logTeff ∼ 3.5 to 4.7, from
MG
∼ −9.5 to 12mag, from [M/H]∼ ...
ATLAS恒星经验光谱库及星表
The parameter coverage of ATLAS-A is from logTeff ∼ 3.5 to 4.7, from
MG
∼ −9.5 to 12mag, from [M/H]∼ ...
FAST第十三批科学数据开放
Neutron Star Systems 34 PT2021_0063 Siwei Zou Searching for 21-cm absorption in
Mg
...
LAMOST DR8 MRS CSN Stellar Parameters and Chemical Abundances Catalog
Chemical Abundances Catalog provides a catalog of stellar parameters and chemical elements (C, Na,
Mg
...
LAMOST DR8 MRS CSN Stellar Parameters and Chemical Abundances Catalog
Chemical Abundances Catalog provides a catalog of stellar parameters and chemical elements (C, Na,
Mg
...
ATLAS empirical stellar library and catalogs
The parameter coverage of ATLAS-A is from logTeff ∼ 3.5 to 4.7, from
MG
∼ −9.5 to 12mag, from [M/H]∼ ...
LAMOST DR8 MRS CSN Stellar Parameters and Chemical Abundances Catalog
Chemical Abundances Catalog provides a catalog of stellar parameters and chemical elements (C, Na,
Mg
...
LAMOST DR8 MRS CSN Stellar Parameters and Chemical Abundances Catalog
Chemical Abundances Catalog provides a catalog of stellar parameters and chemical elements (C, Na,
Mg
...
ATLAS恒星经验光谱库及星表
The parameter coverage of ATLAS-A is from logTeff ∼ 3.5 to 4.7, from
MG
∼ −9.5 to 12mag, from [M/H]∼ ...
SPCANet: Stellar Parameters and Chemical Abundances Network for LAMOST-II Medium Resolution Survey
The abundance precision of 11 elements including [C/H], [N/H], [O/H], [
Mg
/H], [Al/H], [Si/H], [S/H], ...
SPCANet: Stellar Parameters and Chemical Abundances Network for LAMOST-II Medium Resolution Survey
The abundance precision of 11 elements including [C/H], [N/H], [O/H], [
Mg
/H], [Al/H], [Si/H], [S/H], ...
SPCANet: Stellar Parameters and Chemical Abundances Network for LAMOST-II Medium Resolution Survey
The abundance precision of 11 elements including [C/H], [N/H], [O/H], [
Mg
/H], [Al/H], [Si/H], [S/H], ...
SPCANet: Stellar Parameters and Chemical Abundances Network for LAMOST-II Medium Resolution Survey
The abundance precision of 11 elements including [C/H], [N/H], [O/H], [
Mg
/H], [Al/H], [Si/H], [S/H], ...
A Model RRNet for Spectral Information Exploitation and LAMOST Medium-resolution Spectrum Parameter Estimation
>= 10, the precision of estimations Teff and log g are 88 K and 0.13 dex respectively, elements C,
Mg
...
A Model RRNet for Spectral Information Exploitation and LAMOST Medium-resolution Spectrum Parameter Estimation
>= 10, the precision of estimations Teff and log g are 88 K and 0.13 dex respectively, elements C,
Mg
...
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