Observation of HI around three Satellite Galaxies of M31 with FAST:Andromeda Ⅱ,NGC 205,and NGC 185

扫码查看

原文链接

万方数据

外文摘要：With the exceptional sensitivity of the Five-hundred-meter Aperture Spherical radio Telescope,we conducted observations of the neutral hydrogen(H I)in the circumgalactic medium of Andromeda's(M31)satellite galaxies,specifically Andromeda Ⅱ,NGC 205,and NGC 185.Initially,three drift scans were executed for these satellites,with a detection limit of 4×1018cm-2(approximately 1.88×103M☉ of HI mass),followed by a more in-depth scan of a specific region.We discovered a C-shaped HI arc structure sharing a position and line-of-sight velocity similar to a stellar ring structure around Andromeda Ⅱ,hinting at a potential connection with Andromeda Ⅱ.In the context of NGC 205,we identified two mass concentrations in the northeast direction,which could be indicative of tidal streams resulting from the interaction between this galaxy and M31.These new lumps discovered could be very helpful in solving the missing interstellar medium problem for NGC 205.Observations regarding NGC 185 are consistent with previous studies,and we did not detect any additional HI material around this galaxy.These observational results enhance our understanding of the evolution of these satellite galaxies and provide insight into their historical interactions with the galaxy M31.

外文关键词：

ISM:structure(Galaxy:)local interstellar mattergalaxies:interactionsgalaxies:ISM(galaxies:)Local Groupradio lines:ISMradio lines:galaxies

作者：

Ziming Liu、Jie Wang、Yingjie Jing、Chen Xu、Tiantian Liang、Qingze Chen、Zerui Liu、Zhipeng Hou、Yougang Wang

展开 >

作者单位：

National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China

基金：

China National Key Program for Science and Technology Research and Development of ChinaNational Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)CAS Project for Young Scientists in Basic Research grantK.C.Wong Education Foundationscience research grants from the China Manned Space ProjectCultivation Project for FAST Scientific Payoff and Research Achievement of CAMS-CAS

项目编号：

2022YFA16029011198810111873051YSBR-062

出版年：

2024

DOI：

10.1088/1674-4527/ad5397

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(8)