arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新，休息一下吧，周末愉快~~
arXiv 1409.2890astro-ph.GA
收藏

利用河外源确定PPMXL自行参考系

Fixing the Reference Frame for PPMXL Proper Motions Using Extragalactic Sources

Kathleen Grabowski, Jeffrey L. Carlin, Heidi Jo Newberg, Timothy C. Beers, Li Chen, Licai Deng, Carl J. Grillmair, Puragra Guhathakurta, Jinliang Hou, Sebastien… 展开作者

Kathleen Grabowski, Jeffrey L. Carlin, Heidi Jo Newberg, Timothy C. Beers, Li Chen, Licai Deng, Carl J. Grillmair, Puragra Guhathakurta, Jinliang Hou, Sebastien Lepine, Chao Liu, Xiaowei Liu, A-Li Luo, Martin C. Smith, Brian Yanny, Haotong Zhang, Zheng Zheng

备注：
Accepted for publication in RAA; 12 pages, 6 figures (Fig. 1 at reduced resolution); full table of corrections available in online journal, with arxiv ancillary files (as ASCII table), or by request
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们量化和纠正系统误差PPMXL自行使用河外来源的前两个LAMOST数据发布和Veron-Cetty & Veron类星体目录。虽然大部分的来源是从贝隆目录，LAMOST作出了重要的贡献，在地区没有得到很好的采样由以前的目录，特别是在低银河系纬度和南银河冠。我们发现，类星体在PPMXL有可测量的和显着的自行，这反映了系统的零点偏移存在于目录中。我们证实了Wu，Ma，& Zhou（2011）所观察到的全球自行移动，并且还发现了类星体对绝对坐标系的修正的较小尺度波动。我们平均的自行158,106河外天体在3x 3度的箱子，并提出了自行修正表。

英文摘要：

We quantify and correct systematic errors in PPMXL proper motions using extragalactic sources from the first two LAMOST data releases and the Veron-Cetty & Veron Catalog of Quasars. Although the majority of the sources are from the Veron catalog, LAMOST makes important contributions in regions that are not well-sampled by previous catalogs, particularly at low Galactic latitudes and in the south Galactic cap. We show that quasars in PPMXL have measureable and significant proper motions, which reflect the systematic zero-point offsets present in the catalog. We confirm the global proper motion shifts seen by Wu, Ma, & Zhou (2011), and additionally find smaller-scale fluctuations of the QSO-derived corrections to an absolute frame. We average the proper motions of 158,106 extragalactic objects in bins of 3x3 degrees and present a table of proper motion corrections.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑