The nearby spiral density-wave structure of the Galaxy: line-of-sight velocities of the Gaia DR2 OB stars

被引：5

作者：

Griv, Evgeny ^{[1
]}

Gedalin, Michael ^{[1
]}

Jiang, Ing-Guey ^{[2
,3
,4
]}

机构：

[1] Ben Gurion Univ Negev, Dept Phys, POB 653, IL-8410501 Beer Sheva, Israel

[2] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[3] Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan

[4] Natl Tsing Hua Univ, Ctr Informat & Computat Astron, Hsinchu 30013, Taiwan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 503卷 / 01期

基金：

以色列科学基金会;

关键词：

Galaxy: kinematics and dynamics; Galaxy: structure; galaxies: spiral; MILKY-WAY; TRIGONOMETRIC PARALLAXES; DISK GALAXIES; FORMING REGIONS; KINEMATICS; ROTATION; SYSTEM; MOTION; CURVE; MASS;

D O I：

10.1093/mnras/stab455

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Distances and line-of-sight velocities of 964 Gaia Data Release 2 (DR2) OB stars of Xu et al. within 3 kpc from the Sun and 500 pc from the Galactic mid-plane with accuracies of <50 per cent are selected. The data are used to find small systematic departures of velocities from the mean circular motion for the stars in the solar neighborhood due to the spiral compression-type (Lin-Shu-type) waves, or spiral density waves, e.g. those produced by real instabilities of spontaneous gravity disturbances, a central bar or a companion system. A key point of the study is that our results are consistent with the ones extracted from the asymptotic density-wave theory. Revised parameters of density waves in the solar vicinity of the Galaxy are also provided.

引用

页码：354 / 361

页数：8

共 77 条

[1] A geometric distance measurement to the Galactic center black hole with 0.3% uncertainty [J].

Abuter, R. ;

Amorim, A. ;

Bauboeeck, M. ;

Berger, J. P. ;

Bonnet, H. ;

Brandner, W. ;

Clenet, Y. ;

du Foresto, V. Coude ;

de Zeeuw, P. T. ;

Dexter, J. ;

Duvert, G. ;

Eckart, A. ;

Eisenhauer, F. ;

Schreiber, N. M. Foeerster ;

Garcia, P. ;

Gao, F. ;

Gendron, E. ;

Genzel, R. ;

Gerhard, O. ;

Gillessen, S. ;

Habibi, M. ;

Haubois, X. ;

Henning, T. ;

Hippler, S. ;

Horrobin, M. ;

Jimenez-Rosales, A. ;

Jocou, L. ;

Kervella, P. ;

Lacour, S. ;

Lapeyrere, V ;

Le Bouquin, J-B ;

Lena, P. ;

Ott, T. ;

Paumard, T. ;

Perraut, K. ;

Perrin, G. ;

Pfuhl, O. ;

Rabien, S. ;

Coira, G. Rodriguez ;

Rousset, G. ;

Scheithauer, S. ;

Sternberg, A. ;

Straub, O. ;

Straubmeier, C. ;

Sturm, E. ;

Tacconi, L. J. ;

Vincent, F. ;

von Fellenberg, S. ;

Waisberg, I ;

Widmann, F. .

ASTRONOMY & ASTROPHYSICS, 2019, 625

[2] A Galactic-scale gas wave in the solar neighbourhood [J].

Alves, Joao ;

Zucker, Catherine ;

Goodman, Alyssa A. ;

Speagle, Joshua S. ;

Meingast, Stefan ;

Robitaille, Thomas ;

Finkbeiner, Douglas P. ;

Schlafly, Edward F. ;

Green, Gregory M. .

NATURE, 2020, 578 (7794) :237-+

[3]

[Anonymous], 1984, PHYS GRAVITATING SYS

[4]

Basharina T. S., 1980, Soviet Astronomy, V24, P559

[5] Vertical waves in the solar neighbourhood in Gaia DR2 [J].

Bennett, Morgan ;

Bovy, Jo .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2019, 482 (01) :1417-1425

[6] ON THE DENSITY WAVE THEORY FOR NORMAL SPIRAL GALAXIES [J].

BERTIN, G .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1980, 61 (01) :1-69

[7] MODAL APPROACH TO THE MORPHOLOGY OF SPIRAL GALAXIES .1. BASIC STRUCTURE AND ASTROPHYSICAL VIABILITY [J].

BERTIN, G ;

LIN, CC ;

LOWE, SA ;

THURSTANS, RP .

ASTROPHYSICAL JOURNAL, 1989, 338 (01) :78-103

[8] DISCRETE SPIRAL MODES IN DISK GALAXIES - SOME NUMERICAL EXAMPLES BASED ON DENSITY WAVE THEORY [J].

BERTIN, G ;

LAU, YY ;

LIN, CC ;

MARK, JWK ;

SUGIYAMA, L .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1977, 74 (11) :4726-4729

[9]

Binney J., 2008, Galactic Dynamics, VSecond Edition, DOI DOI 10.1515/9781400828722

[10] Galactic rotation in Gaia DR1 [J].

Bovy, Jo .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 468 (01) :L63-L67

← 1 2 3 4 5 6 7 8 →