A three-dimensional map of the Milky Way using classical Cepheid variable stars

被引：156

作者：

Skowron, Dorota M. ^{[1
]}

Skowron, Jan ^{[1
]}

Mroz, Przemek ^{[1
]}

Udalski, Andrzej ^{[1
]}

Pietrukowicz, Pawel ^{[1
]}

Soszynski, Igor ^{[1
]}

Szymanski, Michal K. ^{[1
]}

Poleski, Radoslaw ^{[1
,2
]}

Kozlowski, Szymon ^{[1
]}

Ulaczyk, Krzysztof ^{[1
,3
]}

Rybicki, Krzysztof ^{[1
]}

Iwanek, Patryk ^{[1
]}

机构：

[1] Univ Warsaw, Astron Observ, PL-00478 Warsaw, Poland

[2] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

SCIENCE | 2019年 / 365卷 / 6452期

关键词：

GRAVITATIONAL LENSING EXPERIMENT; OGLE-III CATALOG; SPIRAL STRUCTURE; GALACTIC WARP; DISK; COLLECTION; GALAXY; OFFSET; FLARE; 2MASS;

D O I：

10.1126/science.aau3181

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The Milky Way is a barred spiral galaxy, with physical properties inferred from various tracers informed by the extrapolation of structures seen in other galaxies. However, the distances of these tracers are measured indirectly and are model-dependent. We constructed a map of the Milky Way in three dimensions, based on the positions and distances of thousands of classical Cepheid variable stars. This map shows the structure of our Galaxy's young stellar population and allows us to constrain the warped shape of the Milky Way's disk. A simple model of star formation in the spiral arms reproduces the observed distribution of Cepheids.

引用

页码：478 / +

页数：32

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