Catalog Service: Photometry identification of cool white dwarfs
Description
We investigate the use of a narrowband DDO51 filter for photometric identification of cool white dwarfs. We report photometric observations of 30 known cool white dwarfs with temperatures ranging from 10,000K down to very cool temperatures (<=3500K). Follow-up spectroscopic observations of a sample of objects selected using this filter and our photometric observations show that DDO51 filter photometry can help select cool white dwarf candidates for follow-up multiobject spectroscopy by rejecting 65% of main-sequence stars with the same broadband colors as the cool white dwarfs. This technique is not selective enough to efficiently feed single-object spectrographs. We present the white dwarf cooling sequence using this filter. Our observations show that very cool white dwarfs form a sequence in the r-DDO versus r-z color-color diagram and demonstrate that significant improvements are needed in white dwarf model atmospheres.
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Publisher: CDSivo://CDS[Pub. ID]
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This resource was registered on: 2005 Jul 01 23:04:02ZThis resource description was last updated on: 2021 Oct 21 00:00:00Z
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This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource.
This is a standard IVOA service that takes as input an ADQL or PQL query and returns tabular data.
This is a standard IVOA service that takes as input a position in the sky and a radius and returns catalog records with positions within that radius.
Cone search capability for table J/AJ/128/1825/table2 (Objects with HET+McDonald 2.7Meter Spectroscopy)
VERB=1
VERB=3
Cone search capability for table J/AJ/128/1825/table3 (DDO51 Photometry for Previously Identified White Dwarfs)
Cone search capability for table J/AJ/128/1825/table1 (Objects with SDSS Spectroscopy)
Developed with the support of the National Science Foundation under Cooperative Agreement AST0122449 with the Johns Hopkins University The NAVO project is a member of the International Virtual Observatory Alliance
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