Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-05-15
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
18 pages, 9 figures, MNRAS accepted, catalogue available at http://www.astro.ru.nl/~ndeacon/catalogues/
Scientific paper
We present a proper motion survey of the Galactic plane, using IPHAS data and POSS-I Schmidt plate data as a first epoch, that probes down to proper motions below 50 milliarcseconds per year. The IPHAS survey covers the northern plane ($|b| < 5^{\circ}$) with CCD photometry in the $r$, $i$ and H${\alpha}$ passbands. We examine roughly 1400 sq. deg. of the IPHAS survey area and draw up a catalogue containing 103058 objects with significant proper motions below 150 millarcseconds per year in the magnitude range 13.5$< r' <$19. Our survey sample contains large samples of white dwarfs and subdwarfs which can be identified using a reduced proper motion diagram. We also found several objects with IPHAS colours suggesting H${\alpha}$ emission and significant proper motions. One is the known cataclysmic variable GD552; two are known DB white dwarfs and five others are found to be non-DA (DB and DC) white dwarfs, which were included in the H$\alpha$ emission line catalogue due to their lack of absorption in the H$\alpha$ narrow-band.
Aungwerojwit A.
Deacon Niall R.
Drake Jeremy J.
Drew Janet E.
Greimel Robert
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