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Mapping spiral structure on the far side of the Milky Way - MaRDI portal

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Mapping spiral structure on the far side of the Milky Way

From MaRDI portal
Publication:4645993

DOI10.1126/SCIENCE.AAN5452zbMATH Open1404.85014arXiv1710.06489OpenAlexW2763181674WikidataQ47846136 ScholiaQ47846136MaRDI QIDQ4645993

Author name not available (Why is that?)

Publication date: 11 January 2019

Published in: (Search for Journal in Brave)

Abstract: Little is known about the portion of the Milky Way lying beyond the Galactic center at distances of more than 9 kilo-parsec from the Sun. These regions are opaque at optical wavelengths due to absorption by interstellar dust, and distances are very large and hard to measure. We report a direct trigonometric parallax distance of 20.4_{-2.2}^{+2.8} kilo-parsec obtained with the Very Long Baseline Array to a water maser source in a region of active star formation. These measurements allow us to shed light on Galactic spiral structure by locating the Scutum-Centaurus spiral arm as it passes through the far side of the Milky Way, and to validate a kinematic method for determining distances in this region based on transverse motions.


Full work available at URL: https://arxiv.org/abs/1710.06489




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