The white dwarf luminosity functions from the Pan–STARRS 1 3π Steradian Survey. Issue 1 (8th October 2018)

• Record Type: Journal Article
• Authors: Lam, Marco C; Hambly, Nigel C; Rowell, Nicholas; Chambers, Kenneth C; Goldman, Bertrand; Hodapp, Klaus W; Kaiser, Nick; Kudritzki, Rolf-Peter; Magnier, Eugene A; Tonry, John L; Wainscoat, Richard J; Waters, Christopher
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 482:Issue 1(2019)
• Page Start: 715
• Page End: 731
• Publication Date: 2018-10-08
• Subjects: surveys -- proper motions -- stars: luminosity function, mass function -- white dwarfs -- solar neighbourhood; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/sty2710
• Languages: English
• ISSNs: 0035-8711

Abstract

Abstract: A large sample of white dwarfs is selected by both proper motion and colours from the Pan-STARRS 1 $3\pi$ Steradian Survey Processing Version 2 to construct the white dwarf luminosity functions of the discs and halo in the solar neighbourhood. Four-parameter astrometric solutions were recomputed from the epoch data. The generalized maximum volume method is then used to calculate the density of the populations. After removal of crowded areas near the Galactic plane and centre, the final sky area used by this work is 7.833 sr, which is $83{{\ \rm per\ cent}}$ of the $3\pi$ sky and $62{{\ \rm per\ cent}}$ of the whole sky. By dividing the sky using Voronoi tessellation, photometric and astrometric uncertainties are recomputed at each step of the integration to improve the accuracy of the maximum volume. Interstellar reddening is considered throughout the work. We find a disc-to-halo white dwarf ratio of about 100.