Exploring open cluster properties with Gaia and LAMOST
Exploring open cluster properties with Gaia and LAMOST
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使用 Gaia 和 LAMOST 探索疏散星团属性
DOI：
10.1051/0004-6361/201937131
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发表时间：
2020-06
影响因子：
6.5
通讯作者：
Hou J.
中科院分区：
文献类型：
--
作者：
Zhong J.;Chen L.;Wu D.;Li L.;Bai L.;Hou J.
上下文在盖亚DR 2中，天文测量的精度达到了前所未有的高水平，达到了毫角秒，测光达到了毫米级。利用Gaia DR 2天体测量和光度测量所确定的星系团成员，我们可以得到一个可靠的星系团性质的测定。然而，由于盖亚光谱观测在处理密集拥挤的星团区域方面的缺点，盖亚DR 2的星团成员星的RV和金属丰度值仍然缺乏。有必要将盖亚数据与LAMOST，APOGEE，GALAH和Gaia-ESO等大型光谱调查的数据相结合。
目标。在这项研究中，我们的目标是通过结合LAMOST光谱来改善团簇性质。特别是，我们提供了一个列表的集群成员的光谱参数作为一个增值目录LAMOST DR 5，它可以用来执行一个详细的研究，更好地了解恒星的性质，通过使用它们的光谱和基本属性的主机集群。
方法.我们将LAMOST DR 5中的光谱目录与Cantat-Gaudin等人（2018，A&A，618，A93）中确定的集群成员进行了交叉匹配。然后，我们使用的成员与光谱参数，以获得疏散星团的统计特性。
结果我们获得了8811个成员的光谱参数和295个集群属性的目录。所提供的星系团性质包括天体测量参数、光谱参数、运动学和轨道参数以及等时线拟合结果。此外，我们还用编制的疏散星团作为示踪剂研究了径向和垂直金属丰度梯度以及年龄-金属丰度关系，发现斜率分别为−0.053 ± 0.004 dex kpc−1、−0.252 ± 0.039 dex kpc−1和0.022 ± 0.008 dex Gyr−1。年轻星团（0.1Gyr < Age <2Gyr）的金属丰度分布关系和6 Gyr以内星团的年龄-金属丰度关系的斜率与文献结果一致。为了更全面地研究星盘中的化学演化历史，需要对古老和遥远的疏散星团进行更多的光谱观测。
Context. In Gaia DR2, an unprecedented high level of precision has been reached at sub-milliarcsecond for astrometry and millimagnitudes for photometry. Using cluster members identified with the astrometry and photometry in Gaia DR2, we can obtain a reliable determination of cluster properties. However, because of the shortcomings of Gaia spectroscopic observations in dealing with densely crowded cluster regions, the RVs and metallicity values for cluster member stars from Gaia DR2 are still lacking. It is necessary to combine the Gaia data with the data from large spectroscopic surveys, such as LAMOST, APOGEE, GALAH, and Gaia-ESO.
Aims. In this study our aim is to improve the cluster properties by combining the LAMOST spectra. In particular, we provide the list of cluster members with spectroscopic parameters as an add-value catalog in LAMOST DR5, which can be used to perform a detailed study for a better understanding of the stellar properties, by using their spectra and fundamental properties from the host cluster.
Methods. We cross-matched the spectroscopic catalog in LAMOST DR5 with the identified cluster members in Cantat-Gaudin et al. (2018, A&A, 618, A93). We then used members with spectroscopic parameters to derive statistical properties of open clusters.
Results. We obtained a list of 8811 members with spectroscopic parameters and a catalog of 295 cluster properties. The provided cluster properties include astrometric parameters, spectroscopic parameters, derived kinematic and orbital parameters, and isochrone fitting results. In addition, we study the radial and vertical metallicity gradient and age-metallicity relation with the compiled open clusters as tracers, finding slopes of −0.053 ± 0.004 dex kpc−1, −0.252 ± 0.039 dex kpc−1, and 0.022 ± 0.008 dex Gyr−1, respectively. The slopes of the metallicity distribution relation for young clusters (0.1 Gyr < Age < 2 Gyr) and the age-metallicity relation for clusters within 6 Gyr are both consistent with the literature results. In order to fully study the chemical evolution history in the disk, more spectroscopic observations for old and distant open clusters are needed for further investigation.
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影响因子：
6.5
作者：
A. Krone-Martins;A. Moitinho
通讯作者：
A. Krone-Martins;A. Moitinho
影响因子：
6.5
作者：
N. Kharchenko;A. Piskunov;A. Piskunov;E. Schilbach;S. Röser;Ralf-Dieter Scholz
通讯作者：
N. Kharchenko;A. Piskunov;A. Piskunov;E. Schilbach;S. Röser;Ralf-Dieter Scholz
DOI：
10.1051/0004-6361/201526370
发表时间：
2015-11
期刊：
arXiv: Solar and Stellar Astrophysics
影响因子：
--
作者：
M. Netopil;E. Paunzen;U. Heiter;C. Soubiran
通讯作者：
M. Netopil;E. Paunzen;U. Heiter;C. Soubiran
DOI：
10.1051/0004-6361/201629363
发表时间：
2016-08
期刊：
arXiv: Astrophysics of Galaxies
影响因子：
--
作者：
F. Anders;C. Chiappini;I. Minchev;A. Miglio;J. Montalbán;B. Mosser;T. Rodrigues;T. Rodrigues
通讯作者：
F. Anders;C. Chiappini;I. Minchev;A. Miglio;J. Montalbán;B. Mosser;T. Rodrigues;T. Rodrigues
DOI：
10.1088/0004-6256/139/5/1942
发表时间：
2010-04
期刊：
The Astronomical Journal
影响因子：
--
作者：
E. Friel;H. Jacobson;C. Pilachowski
通讯作者：
E. Friel;H. Jacobson;C. Pilachowski