NAOC Open IR
The M31/M33 tidal interaction: a hydrodynamic simulation of the extended gas distribution
Tepper-Garcia, Thor1,2; Bland-Hawthorn, Joss1,2; Li, Di3,4,5
2020-04-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume493Issue:4Pages:5636-5647
AbstractWe revisit the orbital history of the Triangulum galaxy (M33) around the Andromeda galaxy (M31) in view of the recent Gaia Data Release 2 proper motion measurements for both Local Group galaxies. Earlier studies consider highly idealized dynamical friction, but neglect the effects of dynamical mass loss. We show the latter process to be important using mutually consistent orbit integration and N-body simulations. Following this approach, we find an orbital solution that brings these galaxies to within similar to 50 kpc of each other in the past, similar to 6.5 Gyr ago. We explore the implications of their interaction using an N-body/hydrodynamical simulation with a focus on the origin of two prominent features: (1) M31's Giant Stellar Stream; and (2) the M31-M33 HI filament. We find that the tidal interaction does not produce a structure reminiscent of the stellar stream that survives up to the present day. In contrast, the M31-M33 HI filament is likely a fossil structure dating back to the time of the ancient encounter between these galaxies. Similarly, the observed outer disc warp in M33 may well be a relic of this past event. Our model suggests the presence of a tidally induced gas envelope around these galaxies, and the existence of a diffuse gas stream, the 'Triangulum stream', stretching for tens of kpc from M33 away from M31. We anticipate upcoming observations with the recently commissioned, Five-hundred-metre Aperture Spherical radio Telescope that will target the putative stream in its first years of operation.
Keywordmethods: numerical galaxies: individual: Andromeda galaxies: individual: Triangulum galaxies: interactions Local Group
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge
DOI10.1093/mnras/staa317
WOS KeywordSTAR-FORMATION HISTORY ; ANDROMEDA GALAXY ; MILKY-WAY ; MASS ; M31 ; VELOCITY ; STREAM ; HALO ; SUBSTRUCTURE ; STABILITY
Language英语
Funding ProjectNational Natural Science Foundation of China[11988101] ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Research Council (ARC) through an Australian Laureate Fellowship ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge ; Australian Federal Government, through the University of Sydney's Grand Challenge Program the Astrophysics Grand Challenge
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000539094400078
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/83086
Collection中国科学院国家天文台
Corresponding AuthorTepper-Garcia, Thor
Affiliation1.Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia
2.Ctr Excellence All Sky Astrophys Three Dimens AST, Stromlo, ACT, Australia
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Five Hundred Meter Aperture Spher Radio T, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 101408, Peoples R China
5.Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr, ZA-4000 Durban, South Africa
Recommended Citation
GB/T 7714
Tepper-Garcia, Thor,Bland-Hawthorn, Joss,Li, Di. The M31/M33 tidal interaction: a hydrodynamic simulation of the extended gas distribution[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,493(4):5636-5647.
APA Tepper-Garcia, Thor,Bland-Hawthorn, Joss,&Li, Di.(2020).The M31/M33 tidal interaction: a hydrodynamic simulation of the extended gas distribution.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,493(4),5636-5647.
MLA Tepper-Garcia, Thor,et al."The M31/M33 tidal interaction: a hydrodynamic simulation of the extended gas distribution".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 493.4(2020):5636-5647.
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