What can Gaia proper motions tell us about Milky Way dwarf galaxies?

S. Jin; A. Helmi; M. Breddels

doi:10.1051/eas/1567043

What can Gaia proper motions tell us about Milky Way dwarf galaxies?

S. Jin, A. Helmi, M. Breddels

Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

Abstract

We present a proper-motion study on models of the dwarf spheroidal galaxy Sculptor, based on the predicted proper-motion accuracy of Gaia measurements. Gaia will measure proper motions of several hundreds of stars for a Sculptor-like system. Even with an uncertainty on the proper motion of order 1.5 times the size of an individual proper-motion value of ˜10 mas/century, we find that it is possible to recover Sculptor's systemic proper motion at its distance of 79 kpc.

Original language	English
Title of host publication	The Milky Way Unravelled by Gaia
Subtitle of host publication	GREAT Science from the Gaia Data Releases
Publisher	EAS Publications Series
Pages	241-245
Volume	67-68
DOIs	https://doi.org/10.1051/eas/1567043
Publication status	Published - Jul-2014

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@inproceedings{f2ba4793bd13415aa04ba379bfebbf71,

title = "What can Gaia proper motions tell us about Milky Way dwarf galaxies?",

abstract = "We present a proper-motion study on models of the dwarf spheroidal galaxy Sculptor, based on the predicted proper-motion accuracy of Gaia measurements. Gaia will measure proper motions of several hundreds of stars for a Sculptor-like system. Even with an uncertainty on the proper motion of order 1.5 times the size of an individual proper-motion value of ˜10 mas/century, we find that it is possible to recover Sculptor's systemic proper motion at its distance of 79 kpc.",

author = "S. Jin and A. Helmi and M. Breddels",

year = "2014",

month = jul,

doi = "10.1051/eas/1567043",

language = "English",

volume = "67-68",

pages = "241--245",