2018A&A...614A..96W


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.09CEST05:18:23

2018A&A...614A..96W - Astronomy and Astrophysics, volume 614A, 96-96 (2018/6-1)

First detection of bromine and antimony in hot stars.

WERNER K., RAUCH T., KNORZER M. and KRUK J.W.

Abstract (from CDS):

Bromine (Z = 35) and antimony (Z = 51) are extremely difficult to detect in stars.In very few instances, weak and mostly uncertain identifications of BrI, BrII, and SbII in relatively cool, chemically peculiar stars were successful. Adopted solar abundance values rely on meteoritic determinations. Here, we announce the first identification of these species in far-ultraviolet spectra of hot stars (with effective temperatures of 49 500-70 000 K), namely in helium-rich (spectral type DO) white dwarfs. We identify the BrVI resonance line at 945.96 Å. A previous claim of Br detection based on this line is incorrect because its wavelength position is inaccurate by about 7 Å in atomic databases. Taking advantage of precise laboratory measurements, we identify this line as well as two other, subordinate BrVI lines. Antimony is detected by the SbV resonance doublet at 1104.23/1225.98 Å as well as two subordinate SbVI lines. A model-atmosphere analysis reveals strongly oversolar Br and Sb abundances that are caused by radiative-levitation dominated atomic diffusion.

Abstract Copyright: © ESO 2018

Journal keyword(s): diffusion - stars: abundances - stars: atmospheres - stars: AGB and post-AGB - white dwarfs

Simbad objects: 7

goto Full paper

goto View the reference in ADS

Number of rows : 7

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 EGGR 901 WD* 01 12 23.0598123991 +11 23 36.100490145   15.15 15.40 15.69   DOZ.7 38 0
2 RX J0503.9-2854 WD* 05 03 55.5147387403 -28 54 34.631014015 12.29 13.55 13.58     DO 91 0
3 HD 72660 * 08 34 01.6143548549 -02 09 05.594896178   5.797 5.792     A0V 112 0
4 V* V816 Cen dS* 11 37 37.0411005456 -46 42 34.875395453 8.99 8.79 8.03     F8/G0p 288 0
5 * 3 Cen A PM* 13 51 49.6006362765 -32 59 38.730858352   4.377 4.520     B5III 20 0
6 HD 149499B WD* 16 38 31.199 -57 28 10.70   11.12 11.26     DOZ1 100 0
7 HD 175640 * 18 56 22.6598248501 -01 47 59.505133114 5.86 6.149 6.196     B9IIIpHgMnEu 134 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018A&A...614A..96W and select 'bookmark this link' or equivalent in the popup menu


2020.08.09-05:18:23

© Université de Strasbourg/CNRS

    • Contact