The norma spiral arm: large-scale pitch angle

DOI	Resolve DOI: https://doi.org/10.1007/s10509-017-3145-5
Author	Search for: Vallée, Jacques P.¹
Affiliation	National Research Council Canada. Herzberg Astronomy and Astrophysics
Format	Text, Article
Subject	Galaxies: spiral; Galaxy: disk; Galaxy: structure; Methods: statistical; ISM: general; ISM: structure
Abstract	In the inner Galaxy, we statistically find the mean pitch angle of the recently mapped Norma arm in two galactic quadrants (observed tangentially at galactic longitudes near l=328∘ and near l=20∘), using the twin-tangent method, and obtain −13.7∘±1.4∘. We compared with other measurements in the literature. Also, using the latest published data on pitch angle and the latest published data on the radial starting point of the four arms (RGal=2.2 kpc) in each galactic quadrant, a revised velocity plot of the Norma spiral arm is made, along with other spiral arms in the Milky Way, in each Galactic quadrant.
Publication date	2017-08-25
Publisher	Springer
In	Astrophysics and Space Science 362, no. 9.
Language	English
Peer reviewed	Yes
NPARC number	23003384
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Record identifier	0784e696-c2bb-4b1b-832e-5ab9a3d99f08
Record created	2018-06-13
Record modified	2020-03-16

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