Candidate members of the Pal 5, GD-1, Cetus Polar and Orphan tidal stellar halo streams fr

Candidate members of the Pal 5, GD-1, Cetus Polar and Orphan tidal stellar halo streams from SDSS

DR9, LAMOST DR3 and APOGEE catalogs

Guang-Wei Li;Yue-Fei Wang;Yong Zhang;Brian Yanny;Hao-Tong Zhang;Zong-Rui Bai;Yue Wu;Yi-Qiao Dong;Ya-Juan Lei;Hai-Long Yuan;Yong-Hui Hou

【期刊名称】《天文和天体物理学研究》 【年(卷),期】2017(017)006

【摘要】We present candidate members of the Pal 5,GD-1,Cetus Polar and Orphan tidal stellar streams found in LAMOST DR3,SDSS DR9 and APOGEE catalogs.In LAMOST DR3,we find 20,4 and 24 high confidence candidates

of

tidal

streams

GD-1,Cetus

Polar

and

Orphan

respectively.We also list 59,118 and 10 high confidence candidates of tidal streams Cetus Polar,Orphan and Pal 5,respectively from the SDSS DR9 spectroscopic catalog.Furthermore,we find seven high confidence candidates of the Pal 5 tidal stream in the APOGEE data.Compared with SDSS,the new candidates from LAMOST DR3 are brighter,so that together,more of the color-magnitude diagram,including the giant branch,can be explored.Analysis of the SDSS data shows that there are three metallicity peaks associated with the Orphan stream which also exhibit some spatial separation.The LAMOST data confirm multiple metallicities in this stream.The metallicity,given by the higher resolution APOGEE instrument,of the Pal 5 tidal stream is [Fe/H] ～-1.2,higher than