ON THE METALLICITIES OF KEPLER STARS

ON THE METALLICITIES OF KEPLER STARS
复制标题

关于开普勒星的金属性

DOI:
10.1088/2041-8205/789/1/l3
复制
发表时间:
2013-11
影响因子:
7.9
通讯作者:
Zhang, Yong
Zhang, Yong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yang, X. H.;Zhang, Haotong;Jin, Ge;Zhang, Yong

文献摘要

参考文献

被引文献

相似文献

我们使用来自大天区多目标光纤光谱望远镜(LAMOST)光谱巡天数据的12,000颗恒星,表明开普勒输入目录(KIC)中给出的开普勒场星的金属丰度系统地低估了开普勒样本的真实金属丰度和动态范围。具体地说,对于一阶近似,我们发现[Fe/H]KIC = −0.20 + 0.43[Fe/H]LAMOST,分散度为0.25 dex,几乎完全是由于KIC的误差。这种关系在−0.3 < [Fe/H]LAMOST < +0.4的情况下是最可靠的,在这种情况下,我们在每0.1 dex仓中有超过200颗比较星,并且在LAMOST测定的金属丰度和高分辨率光谱之间显示出良好的一致性。它在稍宽的范围内仍然近似有效。当关系颠倒时,由KIC导出的真实金属丰度的误差为(0.25 dex)/0.43-0.6 dex。因此,我们定量地证实了布朗等人的警告,KIC估计[Fe/H]不应该被“任何对恒星金属丰度特别感兴趣的人”使用。幸运的是,在不久的将来将有更多的LAMOST光谱金属丰度。
We use 12,000 stars from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) spectroscopic survey data to show that the metallicities of Kepler field stars as given in the Kepler Input Catalog (KIC) systematically underestimate both the true metallicity and the dynamic range of the Kepler sample. Specifically, to the first order approximation, we find [Fe/H]KIC = −0.20 + 0.43[Fe/H]LAMOST, with a scatter of ∼0.25 dex, due almost entirely to errors in KIC. This relation is most secure for −0.3 < [Fe/H]LAMOST < +0.4 where we have >200 comparison stars per 0.1 dex bin and good consistency is shown between metallicities determined by LAMOST and high-resolution spectra. It remains approximately valid in a slightly broader range. When the relation is inverted, the error in true metallicity as derived from KIC is (0.25 dex)/0.43–0.6 dex. We thereby quantitatively confirm the cautionary note by Brown et al. that KIC estimates of [Fe/H] should not be used by “anyone with a particular interest in stellar metallicities”. Fortunately, many more LAMOST spectroscopic metallicities will be available in the near future.
DOI: 10.1088/0004-637x/738/2/177
发表时间: 2011-06
期刊: The Astrophysical Journal
影响因子: --
作者:
K. Schlaufman;G. Laughlin
通讯作者: K. Schlaufman;G. Laughlin
DOI: 10.1088/0004-637x/771/2/107
发表时间: 2013-07-10
影响因子: 4.9
作者:
Everett, Mark E.;Howell, Steve B.;Szkody, Paula
通讯作者: Szkody, Paula
DOI: 10.1088/0004-637x/757/2/161
发表时间: 2012-08
期刊: The Astrophysical Journal
影响因子: --
作者:
G. Torres;D. Fischer;A. Sozzetti;L. Buchhave;J. Winn;M. Holman;J. Carter
通讯作者: G. Torres;D. Fischer;A. Sozzetti;L. Buchhave;J. Winn;M. Holman;J. Carter
DOI: 10.1051/aas:1996222
发表时间: 1996-09
期刊: Astronomy & Astrophysics Supplement Series
影响因子: --
作者:
J. Valenti;N. Piskunov
通讯作者: J. Valenti;N. Piskunov
DOI: 10.1007/s12036-011-9129-x
发表时间: 2011-07
影响因子: 1.1
作者:
H. Röttgering;J. Afonso;P. Barthel;F. Batejat;P. Best;A. Bonafede;M. Brüggen;G. Brunetti;
通讯作者: H. Röttgering;J. Afonso;P. Barthel;F. Batejat;P. Best;A. Bonafede;M. Brüggen;G. Brunetti;