Candidate members of the Pal 5, GD-1, Cetus Polar and Orphan tidal stellar halo streams from SDSS DR9, LAMOST DR3 and APOGEE catalogs

Journal Article · 01 May 2017 · Research in Astronomy and Astrophysics

DOI: https://doi.org/10.1088/1674-4527/17/6/62 · OSTI ID:1402474

Li, Guang -Wei ^[1]; Yanny, Brian ^[2]; Zhang, Hao -Tong ^[1]; Bai, Zong -Rui ^[1]; Wu, Yue ^[1]; Dong, Yi -Qiao ^[1]; Lei, Ya -Juan ^[1]; Yuan, Hai -Long ^[1]; Hou, Yong -Hui ^[3]; Wang, Yue -Fei ^[3]; Zhang, Yong ^[3]

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1. Chinese Academy of Sciences (CAS), Beijing (China)
2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
3. Chinese Academy of Sciences, Nanjing (China)

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, 24 high confidence candidates of tidal streams GD-1, Cetus Polar and Orphan respectively. We also list from the SDSS DR9 spectroscopic catalog 59, 118, 10 high confidence candidates of tidal streams Cetus Polar, Orphan and Pal 5, respectively. Furthermore, we find 7 high confidence candidates of the Pal 5 tidal stream in 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 SDSS data shows that there are 3 metallicity peaks of the Orphan stream and also shows some spatial separation. LAMOST data confirms multiple metallicities in this stream. The metallicity, given by the higher resolution APOGEE instrument, of the Pal 5 tidal stream is [Fe/H] $$\sim -1.2$$, higher than that given earlier by SDSS spectra. Here, many previously unidentified stream members are tabulated here for the first time, along with existing members, allowing future researchers to further constrain the orbits of these objects as they move within the Galaxy's dark matter potential.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1402474
• Report Number(s): arXiv:1703.07153; FERMILAB-PUB-17-426-CD; 1628588
• Journal Information: Research in Astronomy and Astrophysics, Vol. 17, Issue 6; ISSN 1674-4527
• Country of Publication: United States
• Language: English