The slight spin of the old stellar halo
We combine Gaia data release 1 astrometry with Sloan Digital Sky Survey (SDSS) images taken some ~10-15 years earlier, to measure proper motions of stars in the halo of our Galaxy. The SDSS-Gaia proper motions have typical statistical errors of 2 mas/yr down to r ~ 20 mag, and are robust to variatio...
Salvato in:
| Autori principali: | , , |
|---|---|
| Natura: | Article (Journal) Chapter/Article |
| Lingua: | inglese |
| Pubblicazione: |
2017
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| In: |
Arxiv
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| Accesso online: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1703.09230
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| Note sull'autore: | Alis J. Deason, Vasily Belokurov, Sergey E. Koposov, Facundo A. Gomez, Robert J. Grand, Federico Marinacci, and Rüdiger Pakmor |
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