2017A&A...598A.135H


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST04:37:31

2017A&A...598A.135H - Astronomy and Astrophysics, volume 598A, 135-135 (2017/2-1)

Complete spectral energy distribution of the hot, helium-rich white dwarf RX J0503.9-2854.

HOYER D., RAUCH T., WERNER K., KRUK J.W. and QUINET P.

Abstract (from CDS):

Context. In the line-of-sight toward the DO-type white dwarf RX J0503.9-2854, the density of the interstellar medium (ISM) is very low, and thus the contamination of the stellar spectrum almost negligible. This allows us to identify many metal lines in a wide wavelength range from the extreme ultraviolet to the near infrared.
Aims. In previous spectral analyses, many metal lines in the ultraviolet spectrum of RX J0503.9-2854 have been identified. A complete line list of observed and identified lines is presented here.
Methods. We compared synthetic spectra that had been calculated from model atmospheres in non-local thermodynamical equilibrium, with observations.
Results. In total, we identified 1272 lines (279 of them were newly assigned) in the wavelength range from the extreme ultraviolet to the near infrared. 287 lines remain unidentified. A close inspection of the EUV shows that still no good fit to the observed shape of the stellar continuum flux can be achieved although He, C, N, O, Al, Si, P, S, Ca, Sc, Ti, V, Cr, Mn, Fe, Cr, Ni Zn, Ga, Ge, As, Kr, Zr, Mo, Sn, Xe, and Ba are included in the stellar atmosphere models.
Conclusions. There are two possible reasons for the deviation between observed and synthetic flux in the EUV. Opacities from hitherto unconsidered elements in the model-atmosphere calculation may be missing, and/or the effective temperature is slightly lower than previously determined.

Abstract Copyright: © ESO, 2017

Journal keyword(s): atomic data - line: identification - stars: abundances - stars: individual: RX J0503.9-2854 - virtual observatory tools

VizieR on-line data: <Available at CDS (J/A+A/598/A135): tablea1.dat tablea2.dat tablea3.dat tablea4.dat tablea5.dat pdf/*>

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 KPD 0005+5106 WD* 00 08 18.1706793307 +51 23 16.594540226 11.80 13.04 13.32 13.53   DOZ1 113 0
2 PG 0122+200 WD* 01 25 22.5118179721 +20 17 56.963251283   16.2   16.9   DOZ.7 102 0
3 RX J0503.9-2854 WD* 05 03 55.5147387403 -28 54 34.631014015 12.29 13.55 13.58     DO 91 0
4 V* GW Vir WD* 12 01 45.9728868858 -03 45 40.627851273   14.87 15.04     DOQZ1 462 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-04:37:31

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