2002A&A...384..364Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET01:49:49

2002A&A...384..364Z - Astronomy and Astrophysics, volume 384, 364-370 (2002/3-2)

Radiative lifetime measurements and oscillator strengths of astrophysical interest in Ho III.

ZHANG Z.G., SOMESFALEAN G., SVANBERG S., PALMERI P., QUINET P. and BIEMONT E.

Abstract (from CDS):

Radiative lifetimes of three long-lived levels belonging to the 4f105d configuration of Ho III have been measured, for the first time, using the time-resolved laser-induced fluorescence technique. A good agreement between the experimental lifetimes and theoretical results obtained within a multiconfigurational pseudo-relativistic Hartree-Fock (HFR) approach including core-polarization (CP) effects is observed provided an adequate scaling factor is applied to the <4f|r|5d> transition matrix element. From the comparison theory-experiment, it has been possible to assess the reliability of the oscillator strengths of the 4f-5d transitions of astrophysical interest, particularly for the lines depopulating the levels considered in the present work. The present results fill in a gap concerning the f-values of doubly ionized holmium and are needed for a quantitative evaluation of the holmium abundance in some peculiar stars.

Abstract Copyright:

Journal keyword(s): atomic data - atomic processes - stars: chemically peculiar

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* GY And a2* 01 38 31.8241484792 +45 23 58.950612500   6.343 6.380     A2:VpSiSrCrEu 242 0
2 V* V816 Cen dS* 11 37 37.0411005456 -46 42 34.875395453 8.99 8.79 8.03     F8/G0p 292 0
3 V* MW Vul a2* 20 16 27.1968444581 +27 46 33.854994340   6.585 6.645     A0p 115 0

    Equat.    Gal    SGal    Ecl

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2020.11.28-01:49:49

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