Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..13e..16m&link_type=abstract
Exploiting Large Surveys for Galactic Astronomy, 26th meeting of the IAU, Joint Discussion 13, 22-23 August 2006, Prague, Czech
Astronomy and Astrophysics
Astronomy
Scientific paper
The INT/WFC Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS) surveys the entire Northern Galactic Plane in r', i' and Halpha down to r'= 20. Although initially designed to detect Halpha emitting sources, IPHAS has proven very useful for detecting sources with strong Balmer line absorption. Hydrogen-rich white dwarfs with temperatures in the range 10000 K to 20000 K (where the Halpha line is strongest) can be detected by IPHAS with a very high level of confidence. What fraction of the white dwarf population is hydrogen-rich and in this temperature range is relatively well understood. An IPHAS selected sample with well defined temperature limits will therefore allow an independent determination of the local white dwarf density at low Galactic latitudes where the known sample is highly incomplete, but which is crucial for obtaining correct space densities and scale heights.
Groot Paul J.
Morales-Rueda Luisa
Napiwotzki Ralf
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