KPD UV-excess objects : J/ApJS/61/569

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Authors : Downes R.A. orcid (hide) et..al

VizieR DOI : 10.26093/cds/vizier.20610569
Bibcode : 1986ApJS...61..569D (ADS) (Simbad) (Objects)
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CDS Keywords : Stars, white dwarf; Stars, subdwarf; Spectral types; Photometry, UBV
UAT : White dwarf stars, Subdwarf stars, Stellar spectral types, Optical astronomy, Broad band photometry

Observation (OC)

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Inserted into VizieR : 02-Jan-2011
Last modification : 06-Dec-2017

The KPD survey for galactic plane ultraviolet-excess objects space densities of white dwarfs and subdwarfs. (1986)

Keywords : stars faint blue ; stars: stellar statistics ; stars: subdwarfs ; stars: white dwarfs

Abstract:A survey for ultraviolet-excess objects has been performed for over about 1000sq.deg of the Galactic plane. Photographic blue and ultraviolet plates were obtained to select ultraviolet-excess candidates, and spectroscopic observations were used to determine the nature of those objects. Over 70 white dwarfs and subdwarfs were identified from the survey plates, and these objects were analyzed statistically to determine scale heights and space densities. The sample was complete to B=15.3mag, with the space density of white dwarfs for Mv<12.25 equal to 0.72+/-0.25 per 1000pc^3^, slightly higher than that from the Palomar-Green survey. The average absolute magnitude determined for both the subdwarf O and the subdwarf B stars ...(more)
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American Astronomical Society policies
The Kitt Peak-Downes (KPD) survey consists of 3 parts: * photographic data obtained between 1981 July and 1983 July with the 0.6m Warner and Swasey Burrell Schmidt telescope at Kitt Peak, on IIa-O plates with a Schott UG-2 filter for the ultraviolet plates and a Schott UG-2 filter for the blue plates, the same filters used for the PG survey (Green et al. Cat. II/207). The collection is made of 52 plate pairs in regions within 12{deg} of the Galactic plane with declination < 60{deg} * spectroscopic observations of the UV-excess candidates were obtained on the Mount Lemmon UCSD/Minnesota 1.5m telescope equipped with the Robinson-Wampler image-tube scanner, with a low-resolution grating of about 15{AA} in the 4000-6800{AA} range. * photoelectric photometry was obtained with the 1.3m telescope at Kitt Peak with the Mark II photometer. The original semi-accurate positions scatter by typically 30" to 60"; most of the stars have charts, and the accurate positions were derived by B. Skiff (Lowell Obs.) in 2009 April.

  • II/106 : Kiso Ultraviolet Catalog (KUV) (Noguchi+ 1980-1984)
  • II/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)

                


                

                    

                


                

                    

                


                

                    
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