Abstract
We present a proper motion survey of the Galactic plane, using Isaac Newton Telescope (INT) Photometric Hα Survey (IPHAS) data and Palomar Sky Survey (POSS)-I Schmidt plate data as a first epoch, that probes down to proper motions below 50 mas yr -1. The IPHAS survey covers the northern plane (|b| < 5°) with CCD photometry in the r, i and Hα passbands. We examine roughly 1400 deg 2 of the IPHAS survey area and draw up a catalogue containing 103 058 objects with significant proper motions below 150 mas yr -1 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 Hα 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 Hα emission line catalogue due to their lack of absorption in the Hα narrow band.
Original language | English |
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Pages (from-to) | 1685-1694 |
Number of pages | 10 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 397 |
Issue number | 3 |
DOIs | |
Publication status | Published - Aug 2009 |
Externally published | Yes |
Keywords
- Astrometry
- Surveys