TY - JOUR
T1 - An isolated compact galaxy triplet
AU - Feng, Shuai
AU - Shao, Zheng Yi
AU - Shen, Shi Yin
AU - Argudo-Fernández, Maria
AU - Wu, Hong
AU - Lam, Man I.
AU - Yang, Ming
AU - Yuan, Fang Ting
N1 - Funding Information:
We sincerely thank the anonymous referee whose suggestions greatly helped us improve this paper. We are also grateful to the kind staff atthe Xinglong 2.16m telescope for their support during the observations. This work is supported by the 973 Program (Grant No. 2014CB845705), -Strategic Priority Research Program The Emergence of Cosmological Structures- of the Chinese Academy of Sciences (Grant No. XDB09030200) and the National Natural ScienceFoundation of China (Nos. 11390373, 11573050 and 11433003). This work is also supported by the ScienceFoundation of Shanghai (No. 16ZR1442100). Funding for the creation and distribution of the SDSS archive has been provided by the Alfred P. Sloan Foundation, the participating institutions, NASA, the National Science Foundation, the US Department of Energy, the JapaneseMonbukagakusho and the Max Plank Society. The SDSS website is http://www.sdss.org. SDSS is managed by the Astrophysical Research Consortium for the participatinginstitutions. The Large Sky Aea Multi-Object Fiber Spectroscopic Telescope (LAMOST, now called the Guo Shou Jing Telescope) is a NationalMajor Scientific Project built by the Chinese Academy of Sciences. Funding for the project has been provided by the National Development and Reform Commission. LAMOST is operated and managed by National Astronomical Observatories, Chinese Academy of Sciences
Publisher Copyright:
© 2016 National Astronomical Observatories, Chinese Academy of Sciences and IOP Publishing Ltd.
PY - 2016/5
Y1 - 2016/5
N2 - We report the discovery of an isolated compact galaxy triplet SDSS J084843.45+164417.3, which is first detected by the LAMOST spectral survey and then confirmed by a spectroscopic observation of the BFOSC mounted on the 2.16 meter telescope located at Xinglong Station, which is administered by National Astronomical Observatories, Chinese Academy of Sciences. It is found that this triplet is an isolated and extremely compact system, which has an aligned configuration and very small radial velocity dispersion. The member galaxies have similar colors and show marginal star formation activities. These results support the opinion that the compact triplets are well-evolved systems rather than hierarchically forming structures. This serendipitous discovery reveals the limitations of fiber spectral redshift surveys in studying such a compact system, and demonstrates the necessity of additional observations to complete the current redshift sample.
AB - We report the discovery of an isolated compact galaxy triplet SDSS J084843.45+164417.3, which is first detected by the LAMOST spectral survey and then confirmed by a spectroscopic observation of the BFOSC mounted on the 2.16 meter telescope located at Xinglong Station, which is administered by National Astronomical Observatories, Chinese Academy of Sciences. It is found that this triplet is an isolated and extremely compact system, which has an aligned configuration and very small radial velocity dispersion. The member galaxies have similar colors and show marginal star formation activities. These results support the opinion that the compact triplets are well-evolved systems rather than hierarchically forming structures. This serendipitous discovery reveals the limitations of fiber spectral redshift surveys in studying such a compact system, and demonstrates the necessity of additional observations to complete the current redshift sample.
KW - evolution
KW - galaxies
KW - group-galaxies
KW - interaction-galaxies
KW - star formation-galaxies
UR - http://www.scopus.com/inward/record.url?scp=84964905130&partnerID=8YFLogxK
U2 - 10.1088/1674-4527/16/5/072
DO - 10.1088/1674-4527/16/5/072
M3 - Article
AN - SCOPUS:84964905130
VL - 16
JO - Research in Astronomy and Astrophysics
JF - Research in Astronomy and Astrophysics
SN - 1674-4527
IS - 5
M1 - 72
ER -