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Characterizing stellar halo populations – I. An extended distribution function for halo K giants

Abstract:

We fit an extended distribution function (EDF) to K giants in the Sloan Extension for Galactic Understanding and Exploration survey. These stars are detected to radii ∼80 kpc and span a wide range in [Fe/H]. Our EDF, which depends on [Fe/H] in addition to actions, encodes the entanglement of metallicity with dynamics within the Galaxy's stellar halo. Our maximum-likelihood fit of the EDF to the data allows us to model the survey's selection function. The density profile of the K giants steepe...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1093/mnras/stw744

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Theoretical Physics
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Theoretical Physics
Publisher:
Oxford University Press Publisher's website
Journal:
Monthly Notices of the Royal Astronomical Society Journal website
Volume:
460
Issue:
2
Pages:
1725–1738
Publication date:
2016-05-01
Acceptance date:
2016-03-23
DOI:
EISSN:
1365-2966
ISSN:
0035-8711
Pubs id:
pubs:640508
URN:
uri:42f8781a-193b-49ff-a284-e4c8681a86fb
UUID:
42f8781a-193b-49ff-a284-e4c8681a86fb
Local pid:
pubs:640508
Keywords:

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