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The GALAH survey: chemodynamics of the solar neighbourhood

Hayden, Michael; Bland-Hawthorn, J.; Sharma, S; Freeman, Kenneth; Kos, J.; Buder, Sven; Anguiano, Borja; Asplund, Martin; Chen, Boquan; De Silva, Gayandhi M; Khanna, Shourya; Lin, Jane; Horner, Jonathan


We present the chemodynamic structure of the solar neighbourhood using 55 652 stars within a 500 pc volume around the Sun observed by GALAH and with astrometric parameters from Gaia DR2. We measure the velocity dispersion for all three components (vertical, radial, and tangential) and find that it varies smoothly with [Fe/H] and [α/Fe] for each component. The vertical component is especially clean, with σvz increasing from a low of 10 km s−1 at solar [α/Fe] and [Fe/H] to a high of more than 50...[Show more]

CollectionsANU Research Publications
Date published: 2020
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/staa335
Access Rights: Open Access


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