The IPHAS-POSS-I proper motion survey of the Galactic plane
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 masyr-1. The IPHAS survey covers the northern plane (|b| < 5°) with CCD photometry in the r,i and Hα passbands. We examine roughly 1400 deg2 of the IPHAS survey area and draw up a catalogue containing 103058 objects with significant proper motions below 150 masyr-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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- August 2009
- DOI:
- 10.1111/j.1365-2966.2009.15077.x
- arXiv:
- arXiv:0905.2594
- Bibcode:
- 2009MNRAS.397.1685D
- Keywords:
-
- surveys;
- astrometry;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 18 pages, 9 figures, MNRAS accepted, catalogue available at http://www.astro.ru.nl/~ndeacon/catalogues/