Two‐component outer ring and the observed galactic spiral structure | Zendy

Mel'nik A.M. | Zendy; Rautiainen P. | Zendy

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Two‐component outer ring and the observed galactic spiral structure

Author(s) -

Mel'nik A.M.,

Rautiainen P.

Publication year - 2013

Publication title -

astronomische nachrichten

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.394

H-Index - 63

eISSN - 1521-3994

pISSN - 0004-6337

DOI - 10.1002/asna.201311920

Subject(s) - physics , spiral galaxy , spiral (railway) , component (thermodynamics) , ring (chemistry) , galaxy , astrophysics , geometry , mathematics , chemistry , mathematical analysis , organic chemistry , thermodynamics

We show that a model of the Galaxy with a two‐component outer ring of class R 1 R 2 can explain many large‐scale morphological features of the galactic spiral structure. The Carina‐Sagittarius arm may consist of two ascending segments of outer R 1 and R 2 rings, which almost touch each other near the Carina region. The Perseus and Crux arms can be partially identified with the descending segments of the R 2 ring. A model of a two‐component outer ring can also explain the existence of some tangential directions. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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