協辦單位
NQU
協辦單位
Kinmen/edu
協辦單位
ASIAA
贊助單位
MOST
會徽Logo
名稱Title
2018天文年會
國立金門大學
5月18日至20日

論文摘要

The discovery of an ultra-cool subdwarf

[ Oral ]

Poshih Chiang (Graduate Institute of Astronomy, National Central University); Wen-Ping Chen (Graduate Institute of Astronomy, National Central University); Chien-Hsiu Lee (NAOJ); Eugene Magnier (Institute of Astronomy, University of Hawaii); Yoshiki Matsuoka (Research Center for Space and Cosmic Evolution, Ehime University); Satoshi Miyazaki (NAOJ); Yutaka Komiyama (NAOJ)

We report the discovery of a metal-poor L-type brown dwarf, which was one of our 12 ultra-cool subdwarf (UCSD) candidates identified from the merged catalog of the HSC, UKIDSS, and ALLWISE surveys. From the Gemini/GNIRS spectrum, we confirmed the features of high surface gravity and weak CO lines, suggesting its' old age. The discovery is the first step to reveal the old population beyond main-sequence stars in Milk Way.