Kinematic groups beyond the solar neighbourhood with RAVE

被引：60

作者：

Antoja, T. ^{[1
]}

Helmi, A. ^{[1
]}

Bienayme, O. ^{[2
]}

Bland-Hawthorn, J. ^{[3
]}

Famaey, B. ^{[2
]}

Freeman, K. ^{[4
]}

Gibson, B. K. ^{[5
]}

Gilmore, G. ^{[6
]}

Grebel, E. K. ^{[7
]}

Minchev, I. ^{[8
]}

Munari, U. ^{[9
]}

Navarro, J. ^{[10
]}

Parker, Q. ^{[11
,12
,13
]}

Reid, W. ^{[12
,13
]}

Seabroke, G. M. ^{[14
]}

Siebert, A. ^{[2
]}

Siviero, A. ^{[8
,15
]}

Steinmetz, M. ^{[8
]}

Williams, M. ^{[8
]}

Wyse, R. ^{[16
]}

Zwitter, T. ^{[17
,18
]}

机构：

[1] Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands

[2] Univ Strasbourg, Astron Observ, CNRS UMR 7550, Strasbourg, France

[3] Univ Sydney, Sydney Inst Astron, Sydney, NSW 2006, Australia

[4] Australian Natl Univ, Mt Stromlo Observ, RSAA, Canberra, ACT 2611, Australia

[5] Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England

[6] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[7] Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, D-69120 Heidelberg, Germany

[8] Leibniz Inst Astrophys Potsdam AIP, D-14482 Potsdam, Germany

[9] INAF Osservatorio Astron Padova, I-36012 Asiago, Italy

[10] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada

[11] Australian Astron Observ, Epping, NSW 1710, Australia

[12] Macquarie Univ, Macquarie Res Ctr Astron Astrophys & Astrophoton, N Ryde, NSW 2109, Australia

[13] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia

[14] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[15] Univ Padua, Dept Phys & Astron, I-35122 Padua, Italy

[16] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[17] Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia

[18] Ctr Excellence SPACE SI, Ljubljana, Slovenia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 426卷 / 01期

基金：

欧洲研究理事会; 加拿大自然科学与工程研究理事会; 澳大利亚研究理事会; 美国国家科学基金会; 瑞士国家科学基金会;

关键词：

Galaxy: evolution; Galaxy: kinematics and dynamics; solar neighbourhood; Galaxy: structure; VELOCITY EXPERIMENT RAVE; NEARBY STARS; HIPPARCOS; BAR; STREAMS; GIANTS; DISC;

D O I：

10.1111/j.1745-3933.2012.01310.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyse the kinematics of disc stars observed by the RAdial Velocity Experiment (RAVE) survey in and beyond the solar neighbourhood. We detect significant overdensities in the velocity distributions using a technique based on the wavelet transform. We find that the main local kinematic groups are large-scale features, surviving at least up to 1 kpc from the Sun in the direction of antirotation, and also at below the Galactic plane. We also find that for regions located at different radii than the Sun, the known groups appear shifted in the vRvf velocity plane. For example, the Hercules group has a larger azimuthal velocity for regions inside the solar circle and a lower value outside. We have also discovered a new group at in the solar neighbourhood and confirmed the significance of other previously found groups. Some of these trends detected for the first time are consistent with dynamical models of the effects of the bar and the spiral arms. More modelling is required to definitively characterize the non-axisymmetric components of our Galaxy using these groups.

引用

页码：L1 / L5

页数：5

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