J/ApJS/224/35 New lifetimes and log(gf) for vanadium (V I) (Holmes+, 2016)
Experimentally measured radiative lifetimes and oscillator strengths in
neutral vanadium.
Holmes C.E., Pickering J.C., Ruffoni M.P., Blackwell-Whitehead R.,
Nilsson H., Engstrom L., Hartman H., Lundberg H., Belmonte M.T.
<Astrophys. J. Suppl. Ser., 224, 35-35 (2016)>
=2016ApJS..224...35H 2016ApJS..224...35H (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data; stars: abundances; Sun: abundances
Abstract:
We report a new study of the V I atom using a combination of
time-resolved laser-induced fluorescence and Fourier transform
spectroscopy that contains newly measured radiative lifetimes for 25
levels between 24648/cm and 37518/cm and oscillator strengths for 208
lines between 3040 and 20000Å from 39 upper energy levels. Thirteen
of these oscillator strengths have not been reported previously. This
work was conducted independently of the recent studies of neutral
vanadium lifetimes and oscillator strengths carried out by Den Hartog
et al. (2014ApJS..215....7D 2014ApJS..215....7D) and Lawler et al. (2014, J/ApJS/215/20),
and thus serves as a means to verify those measurements. Where our
data overlap with their data, we generally find extremely good
agreement in both level lifetimes and oscillator strengths. However,
we also find evidence that Lawler et al. have systematically
underestimated oscillator strengths for lines in the region of
9000±100Å. We suggest a correction of 0.18±0.03dex for these
values to bring them into agreement with our results and those of
Whaling et al. (1985A&A...153..109W 1985A&A...153..109W). We also report new measurements
of hyperfine structure splitting factors for three odd levels of V I
lying between 24700 and 28400/cm.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 98 44 Radiative lifetimes for V I levels with log(gf)
values reported in Table 4
table4.dat 102 208 Experimental log(gf) values for 208 lines
(12 previously not reported) of V I from this
study sorted by upper level energy
--------------------------------------------------------------------------------
See also:
J/ApJS/215/23 : FeI lifetimes & branching fractions (Den Hartog+, 2014)
J/ApJS/215/20 : Vanadium log(gf) and transition probabilities (Lawler+, 2014)
J/MNRAS/441/3127 : FeI oscillator strengths for Gaia-ESO (Ruffoni+, 2014)
J/ApJS/211/31 : Atomic data of vanadium (V I) (Wang+, 2014)
J/A+A/377/361 : Fe II transition probabilities and loggf (Pickering+, 2001)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 24 A24 --- Conf Configuration
26- 30 A5 --- Term Term
32- 35 A4 --- J J quantum number
37- 45 F9.3 cm-1 E [18085.9/37518.5] Energy from
Thorne et al. (2011ApJS..192...11T 2011ApJS..192...11T)
47- 50 F4.1 ns TS-tau [4/72]? This study's measured lifetime
52- 54 F3.1 ns e_TS-tau [0.2/4]? Uncertainty in TS-tau
56- 60 F5.1 ns W85-tau [7.7/395]? Whaling lifetime
(Whaling et al. 1985A&A...153..109W 1985A&A...153..109W)
62- 65 F4.1 ns e_W85-tau [0.5/40]? Uncertainty in W85-tau
67- 71 F5.1 ns D14-tau [4/411] Den Hartog lifetime
(Den Hartog et al. 2014ApJS..215....7D 2014ApJS..215....7D)
73- 76 F4.1 ns e_D14-tau [0.2/21] Uncertainty in D14-tau
78- 81 F4.1 ns O1-tau [7.8/76.4]? First other Laser Induced
Fluorescence lifetime
83- 85 F3.1 ns e_O1-tau [0.4/4.2]? Uncertainty in O1-tau
87 A1 --- r_O1-tau [ef] Reference for O1-tau (1)
89- 92 F4.1 ns O2-tau [7.8/74]? Second other Laser Induced
Fluorescence lifetime
94- 96 F3.1 ns e_O2-tau [0.5/5]? Uncertainty in O2-tau
98 A1 --- r_O2-tau [dfg] Reference for O2-tau (1)
--------------------------------------------------------------------------------
Note (1): Reference as follows:
d = Doerr et al. (1985JQSRT..33...55D 1985JQSRT..33...55D).
e = Rudolph & Helbig (1982JPhB...15L.599R 1982JPhB...15L.599R).
f = Wang et al. (2014, J/ApJS/211/31).
g = Xi et al. (2006JOSAB..23.2597X 2006JOSAB..23.2597X).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 0.1nm lambda [3043.1/20230.6] Transition wavelength
in Angstroms (1)
11- 19 F9.3 cm-1 Eup [18085.9/37518.5] Upper level energy (2)
21- 23 F3.1 --- Jup [0.5/7.5] Upper level J quantum number
25- 33 F9.3 cm-1 Elow [0/17243] Lower level energy (2)
35- 37 F3.1 --- Jlo [0.5/6.5] Lower level J quantum number
39- 45 F7.3 % BF [0.03/100]? Branching fraction
from this work
47- 50 F4.1 % e_BF [0/32]? Relative uncertainty in BF
(where eBF=ΔBF/BF)
52- 56 F5.2 [-] TS-log(gf) [-4/0.7]? This work's log(gf) value
58- 61 F4.2 [-] e_TS-log(gf) [0.01/0.2]? Uncertainty in TS-log(gf)
63 A1 --- f_TS-log(gf) [b] Flag on TS-log(gf) (3)
65- 69 F5.2 [-] L14-log(gf) [-4/0.6]? Lawler log(gf) value
(Lawler et al. 2014, J/ApJS/215/20)
71- 74 F4.2 [-] e_L14-log(gf) [0.02/0.1]? Uncertainty in L14-log(gf)
76 A1 --- f_L14-log(gf) [a] Flag on L14-log(gf) (3)
78- 82 F5.2 [-] W85-log(gf) [-4.1/0.5]? Whaling log(gf) value
(Whaling et al. 1985A&A...153..109W 1985A&A...153..109W)
84- 87 F4.2 [-] e_W85-log(gf) [0.01/0.3]? Uncertainty in W85-log(gf)
89 A1 --- f_W85-log(gf) [a] Flag on W85-log(gf) (3)
91- 95 F5.2 [-] D85-log(gf) [-2.3/0.6]? Doerr log(gf) value
(Doerr et al. 1985JQSRT..33...55D 1985JQSRT..33...55D)
97-100 F4.2 [-] e_D85-log(gf) [0/0.1]? Uncertainty in D85-log(gf)
102 A1 --- f_D85-log(gf) [a] Flag on D85-log(gf) (3)
--------------------------------------------------------------------------------
Note (1): Calculated from the quoted energy levels using the standard index
of air from Peck & Reeder (1972JOSA...62..958P 1972JOSA...62..958P).
Note (2): From Thorne et al. (2011ApJS..192...11T 2011ApJS..192...11T).
Note (3): Flag as follows:
a = The disagreement between these log(gf) values and those obtained in
the present study is discussed in the text.
b = This transition line is blended with another V I line and the BF was
found by fitting the hyperfine structure of the lines comprising the
blended feature, discussed in the text.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 19-Jul-2016