A 3D map of the Milky Way's disk as traced by classical Cepheids

Xiaodian Chen; Shu Wang; Licai Deng; Richard De Grijs; Chao Liu; Hao Tian

doi:10.1017/S174392131900869X

A 3D map of the Milky Way's disk as traced by classical Cepheids

Xiaodian Chen, Shu Wang, Licai Deng, Richard De Grijs, Chao Liu, Hao Tian

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

Abstract

We have collected 2330 Cepheids to establish an intuitive 3D map of the Milky Way's disk. As regards the warp amplitude, the Cepheid disk agrees well with the gas disk for radii up to 15 kpc. However, the mean line of nodes (LON) of the Cepheid disk deviates from the Galactic Center-Sun direction by 17.5±1.0°. This is a new and different result compared with previous results. The LON is not stable at any given radius, but it twists. The twisted pattern suggests that the formation of the Milky Way's warp is dominated by the massive inner disk. The kinematic warp defined by the Cepheids is also in concordance with the spatial warp. In the 2020 era, the anticipated increasing number of new Cepheids will provide a key opportunity to view our Milky Way's disk as a whole, and we expect that our knowledge of the disk's main structural features will be much improved.

Original language	English
Title of host publication	Galactic Dynamics in the Era of Large Surveys
Subtitle of host publication	Proceedings of the 353rd Symposium of the International Astronomical Union held In Shanghai, China, 30 June–5 July, 2019
Editors	Monica Valluri, J. A. Sellwood
Place of Publication	Cambridge
Publisher	Cambridge University Press (CUP)
Pages	6-9
Number of pages	4
ISBN (Print)	9781108482486
DOIs	https://doi.org/10.1017/S174392131900869X
Publication status	Published - 2020
Event	353rd Symposium of the International Astronomical Union - Shanghai, China Duration: 30 Jun 2019 → 5 Jul 2019

Publication series

Name	Proceedings of the International Astronomical Union
Publisher	Cambridge University Press
Number	S353
Volume	14
ISSN (Print)	1743-9213

Conference

Conference	353rd Symposium of the International Astronomical Union
Country/Territory	China
City	Shanghai
Period	30/06/19 → 5/07/19

Keywords

Galaxy: disk
Galaxy: structure
stars: distances
stars: variables: Cepheids

Access to Document

10.1017/S174392131900869X

Cite this

Chen, X., Wang, S., Deng, L., De Grijs, R., Liu, C., & Tian, H. (2020). A 3D map of the Milky Way's disk as traced by classical Cepheids. In M. Valluri, & J. A. Sellwood (Eds.), Galactic Dynamics in the Era of Large Surveys: Proceedings of the 353rd Symposium of the International Astronomical Union held In Shanghai, China, 30 June–5 July, 2019 (pp. 6-9). (Proceedings of the International Astronomical Union; Vol. 14, No. S353). Cambridge University Press (CUP). https://doi.org/10.1017/S174392131900869X

Chen, Xiaodian ; Wang, Shu ; Deng, Licai et al. / A 3D map of the Milky Way's disk as traced by classical Cepheids. Galactic Dynamics in the Era of Large Surveys: Proceedings of the 353rd Symposium of the International Astronomical Union held In Shanghai, China, 30 June–5 July, 2019. editor / Monica Valluri ; J. A. Sellwood. Cambridge : Cambridge University Press (CUP), 2020. pp. 6-9 (Proceedings of the International Astronomical Union; S353).

@inproceedings{8786fddcfd1146c08d9e7ab78a76d6b8,

title = "A 3D map of the Milky Way's disk as traced by classical Cepheids",

abstract = "We have collected 2330 Cepheids to establish an intuitive 3D map of the Milky Way's disk. As regards the warp amplitude, the Cepheid disk agrees well with the gas disk for radii up to 15 kpc. However, the mean line of nodes (LON) of the Cepheid disk deviates from the Galactic Center-Sun direction by 17.5±1.0°. This is a new and different result compared with previous results. The LON is not stable at any given radius, but it twists. The twisted pattern suggests that the formation of the Milky Way's warp is dominated by the massive inner disk. The kinematic warp defined by the Cepheids is also in concordance with the spatial warp. In the 2020 era, the anticipated increasing number of new Cepheids will provide a key opportunity to view our Milky Way's disk as a whole, and we expect that our knowledge of the disk's main structural features will be much improved.",

keywords = "Galaxy: disk, Galaxy: structure, stars: distances, stars: variables: Cepheids",

author = "Xiaodian Chen and Shu Wang and Licai Deng and {De Grijs}, Richard and Chao Liu and Hao Tian",

year = "2020",

doi = "10.1017/S174392131900869X",

language = "English",

isbn = "9781108482486",

series = "Proceedings of the International Astronomical Union",

publisher = "Cambridge University Press (CUP)",

number = "S353",

pages = "6--9",

editor = "Monica Valluri and Sellwood, {J. A.}",

booktitle = "Galactic Dynamics in the Era of Large Surveys",

address = "United Kingdom",

note = "353rd Symposium of the International Astronomical Union ; Conference date: 30-06-2019 Through 05-07-2019",

}

Chen, X, Wang, S, Deng, L, De Grijs, R, Liu, C & Tian, H 2020, A 3D map of the Milky Way's disk as traced by classical Cepheids. in M Valluri & JA Sellwood (eds), Galactic Dynamics in the Era of Large Surveys: Proceedings of the 353rd Symposium of the International Astronomical Union held In Shanghai, China, 30 June–5 July, 2019. Proceedings of the International Astronomical Union, no. S353, vol. 14, Cambridge University Press (CUP), Cambridge, pp. 6-9, 353rd Symposium of the International Astronomical Union, Shanghai, China, 30/06/19. https://doi.org/10.1017/S174392131900869X

A 3D map of the Milky Way's disk as traced by classical Cepheids. / Chen, Xiaodian; Wang, Shu; Deng, Licai et al.
Galactic Dynamics in the Era of Large Surveys: Proceedings of the 353rd Symposium of the International Astronomical Union held In Shanghai, China, 30 June–5 July, 2019. ed. / Monica Valluri; J. A. Sellwood. Cambridge: Cambridge University Press (CUP), 2020. p. 6-9 (Proceedings of the International Astronomical Union; Vol. 14, No. S353).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

TY - GEN

T1 - A 3D map of the Milky Way's disk as traced by classical Cepheids

AU - Chen, Xiaodian

AU - Wang, Shu

AU - Deng, Licai

AU - De Grijs, Richard

AU - Liu, Chao

AU - Tian, Hao

PY - 2020

Y1 - 2020

N2 - We have collected 2330 Cepheids to establish an intuitive 3D map of the Milky Way's disk. As regards the warp amplitude, the Cepheid disk agrees well with the gas disk for radii up to 15 kpc. However, the mean line of nodes (LON) of the Cepheid disk deviates from the Galactic Center-Sun direction by 17.5±1.0°. This is a new and different result compared with previous results. The LON is not stable at any given radius, but it twists. The twisted pattern suggests that the formation of the Milky Way's warp is dominated by the massive inner disk. The kinematic warp defined by the Cepheids is also in concordance with the spatial warp. In the 2020 era, the anticipated increasing number of new Cepheids will provide a key opportunity to view our Milky Way's disk as a whole, and we expect that our knowledge of the disk's main structural features will be much improved.

AB - We have collected 2330 Cepheids to establish an intuitive 3D map of the Milky Way's disk. As regards the warp amplitude, the Cepheid disk agrees well with the gas disk for radii up to 15 kpc. However, the mean line of nodes (LON) of the Cepheid disk deviates from the Galactic Center-Sun direction by 17.5±1.0°. This is a new and different result compared with previous results. The LON is not stable at any given radius, but it twists. The twisted pattern suggests that the formation of the Milky Way's warp is dominated by the massive inner disk. The kinematic warp defined by the Cepheids is also in concordance with the spatial warp. In the 2020 era, the anticipated increasing number of new Cepheids will provide a key opportunity to view our Milky Way's disk as a whole, and we expect that our knowledge of the disk's main structural features will be much improved.

KW - Galaxy: disk

KW - Galaxy: structure

KW - stars: distances

KW - stars: variables: Cepheids

UR - http://www.scopus.com/inward/record.url?scp=85085079354&partnerID=8YFLogxK

U2 - 10.1017/S174392131900869X

DO - 10.1017/S174392131900869X

M3 - Conference proceeding contribution

AN - SCOPUS:85085079354

SN - 9781108482486

T3 - Proceedings of the International Astronomical Union

SP - 6

EP - 9

BT - Galactic Dynamics in the Era of Large Surveys

A2 - Valluri, Monica

A2 - Sellwood, J. A.

PB - Cambridge University Press (CUP)

CY - Cambridge

T2 - 353rd Symposium of the International Astronomical Union

Y2 - 30 June 2019 through 5 July 2019

ER -

Chen X, Wang S, Deng L, De Grijs R, Liu C, Tian H. A 3D map of the Milky Way's disk as traced by classical Cepheids. In Valluri M, Sellwood JA, editors, Galactic Dynamics in the Era of Large Surveys: Proceedings of the 353rd Symposium of the International Astronomical Union held In Shanghai, China, 30 June–5 July, 2019. Cambridge: Cambridge University Press (CUP). 2020. p. 6-9. (Proceedings of the International Astronomical Union; S353). doi: 10.1017/S174392131900869X

A 3D map of the Milky Way's disk as traced by classical Cepheids

Abstract

Publication series

Conference

Keywords

Access to Document

Other files and links

Fingerprint

Cite this