The Pisces Plume and the Magellanic wake

doi:10.1093/mnrasl/slz101

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	The Pisces Plume and the Magellanic wake
	Belokurov, Vasily 1,2; Deason, Alis J.3; Erkal, Denis 4; Koposov, Sergey E.1,5; Carballo-Bello, Julio A.6,7; Smith, Martin C.8; Jethwa, Prashin 9; Navarrete, Camila 6,10,11
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-09-01
卷号	488 期号:1 页码:L47-L52
关键词	stars: variables: RR Lyrae galaxies: dwarf Local Group Magellanic Clouds galaxies: structure
ISSN号	0035-8711
DOI	10.1093/mnrasl/slz101
英文摘要	Using RR Lyrae stars in the Gaia Data Release 2 and Pan-STARRS1 we study the properties of the Pisces overdensity, a diffuse substructure in the outer halo of the Milky Way. We show that along the line of sight, Pisces appears as a broad and long plume of stars stretching from 40 to 110 kpc with a steep distance gradient. On the sky Pisces's elongated shape is aligned with the Magellanic Stream. Using follow-up VLT FORS2 spectroscopy, we have measured the velocity distribution of the Pisces candidate member stars and have shown it to be as broad as that of the Galactic halo but offset to negative velocities. Using a suite of numerical simulations, we demonstrate that the structure has many properties in common with the predicted behaviour of the Magellanic wake, i.e. the Galactic halo overdensity induced by the in fall of the Magellanic Clouds.
资助项目	European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant[308024] ; ERC ; Royal Society University Research Fellowship ; STFC[ST/P000451/1] ; NSF[AST-1813881] ; CAS-CONICYT[17003] ; National Key Basic Research and Development Program of China[2018YFA0404501] ; NSFC[11673083]
WOS关键词	MILKY-WAY ; HALO ; GALAXY ; CLOUD ; ORIGIN ; MASS ; SKY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000482696200009
资助机构	European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant ; ERC ; ERC ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; STFC ; STFC ; NSF ; NSF ; CAS-CONICYT ; CAS-CONICYT ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant ; ERC ; ERC ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; STFC ; STFC ; NSF ; NSF ; CAS-CONICYT ; CAS-CONICYT ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant ; ERC ; ERC ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; STFC ; STFC ; NSF ; NSF ; CAS-CONICYT ; CAS-CONICYT ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant ; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant ; ERC ; ERC ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; STFC ; STFC ; NSF ; NSF ; CAS-CONICYT ; CAS-CONICYT ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27776]
专题	中国科学院国家天文台
通讯作者	Belokurov, Vasily
作者单位	1.Inst Astron, Madingley Rd, Cambridge CB3 0HA, England 2.Flatiron Inst, Ctr Computat Astrophys, 162 5th Ave, New York, NY 10010 USA 3.Univ Durham, Dept Phys, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England 4.Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England 5.Carnegie Mellon Univ, Dept Phys, McWilliams Ctr Cosmol, 5000 Forbes Ave, Pittsburgh, PA 15213 USA 6.Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago 7820436, Chile 7.Chinese Acad Sci, Natl Astron Observ, South Amer Ctr Astron, Beijing 10010, Peoples R China 8.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 9.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 10.Millennium Inst Astrophys, Av Vicuna Mackenna 4860, Santiago 7820436, Chile
推荐引用方式 GB/T 7714	Belokurov, Vasily,Deason, Alis J.,Erkal, Denis,et al. The Pisces Plume and the Magellanic wake[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,488(1):L47-L52.
APA	Belokurov, Vasily.,Deason, Alis J..,Erkal, Denis.,Koposov, Sergey E..,Carballo-Bello, Julio A..,...&Navarrete, Camila.(2019).The Pisces Plume and the Magellanic wake.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,488(1),L47-L52.
MLA	Belokurov, Vasily,et al."The Pisces Plume and the Magellanic wake".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 488.1(2019):L47-L52.