J/ApJ/652/1554 Iron in hot DA white dwarfs (Vennes+, 2006)
Iron in hot DA white dwarfs.
Vennes S., Chayer P., Dupuis J., Lanz T.
<Astrophys. J., 652, 1554-1562 (2006)>
=2006ApJ...652.1554V 2006ApJ...652.1554V
ADC_Keywords: Stars, white dwarf ; Effective temperatures ; X-ray sources ;
Ultraviolet
Keywords: stars: abundances - stars: atmospheres - white dwarfs
Abstract:
We present a study of the iron abundance pattern in hot, hydrogen-rich
(DA) white dwarfs. The study is based on new and archival
far-ultraviolet spectroscopy of a sample of white dwarfs in the
temperature range 30000K≤Teff≤64000K. The spectra obtained with the
Far Ultraviolet Spectroscopic Explorer, along with spectra obtained
with the Hubble Space Telescope Imaging Spectrograph and the
International Ultraviolet Explorer, sample FeIII-FeVI absorption
lines, enabling a detailed iron abundance analysis over a wider range
of effective temperatures than previously afforded.
Description:
The FUSE observations were made using the 30"x30" low-resolution slit
(LWRS), resulting in 100% throughput and ensuring complete spectral
coverage (900Å≤λ≤180Å) with a spectroscopic resolving
power R=lambda/δλ=20000+/2000.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 37 104 Soft X-ray to EUV count rate ratios
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [1RXS]
6- 21 A16 --- 1RXS ROSAT Name (JHHMMSS.s+DDMMSS)
23- 27 F5.2 --- CRRatio Count-rate ratio, C(PSPC)/C(100Å)
29- 32 F4.2 --- e_CRRatio rms uncertainty on CRRatio
34- 37 F4.1 10+3K Teff Effective temperature
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Jul-2008