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Detecting tidal tail of the globular cluster Whiting 1

Published online by Cambridge University Press:  14 May 2020

Jundan Nie Open the ORCID record for Jundan Nie [Opens in a new window]  and
Hao Tian Open the ORCID record for Hao Tian [Opens in a new window]
Jundan Nie
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing100101, China emails: [email protected], [email protected]
Hao Tian
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing100101, China emails: [email protected], [email protected]
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Abstract

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Whiting 1 is a faint and young globular cluster embedded in the Sag dSph. It has similar distance, metalicity and radial velocity with the trailing stream of the Sag. Due to these special properties, Whiting 1 was suggested to be associated with the trailing stream of Sag. However, its origin is still unclear and further investigation of its relation with Sgr dSph is needed. In this work, we use DECaLS data to search the tidal tail of Whiting 1, with the aim of looking for spatial connection between Whiting 1 and Sgr dSph. With Matched Filter method, we detected a tidal tail around the main body of Whiting 1. This tail extends to at least 0.5 degree and aligns with the mean orbit direction of Sgr dSph. This tail is newly detected and it provides additional evidence of the association between Whiting 1 and Sgr trailing stream.

Keywords

galaxies: clusters: individual: Whiting 1Galaxy: structuresurveys
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S353: Galactic Dynamics in the Era of Large Surveys , June 2019 , pp. 121 - 122
Copyright
© International Astronomical Union 2020

Footnotes

†

LAMOST FELLOW

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