Proper motions with Subaru II. A sample in the Subaru/XMM-Newton Deep Survey field

Details Proper motions with Subaru II. A sample in the Subaru/XMM-Newton Deep Survey field Proper motions with Subaru II. A sample in the Subaru/XMM-Newton Deep Survey field

2009-11-25

arxiv.org/abs/0911.4927v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

10 pages, 5 figures. Accepted by Publications of the Astronomical Society of Japan, to appear in volume 62, February 2010. Rev

Scientific paper

We search for stars with proper motions in a set of deep Subaru images, covering about 0.48 square degrees to a depth of $i' \simeq 26$, taken over a span of five and a half years. We follow the methods described in \citet{Richmond2009} to reduce and analyze this dataset. We present a sample of 69 stars with motions of high significance, and discuss briefly the populations from which they are likely drawn. Based on photometry and motions alone, we expect that 14 of the candidates may be white dwarfs. Our candidate with the largest proper motion is surprisingly faint and likely to prove interesting: its colors and motions suggest that it might be an M dwarf moving at over 500 km/sec or an L dwarf in the halo.

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