Table 3
Atomic data of the sodium and potassium lines considered in the CLV analysis, as implemented in the model atoms of Lind et al. (2011) and Reggiani et al. (2019).
| λ (Å) | Transition | (a)AE (cm−1) | (b)log (gƒ) | (c)σ (a.u.) | (d)α | (e)λint (Å) |
|---|---|---|---|---|---|---|
| 5896 |  |
16 956.17 | –0.194 | 407 | 0.237 | 5895.2100-5896.2910 |
| 5688 |  |
17 575.36 | –0.452 | 1955 | 0.327 | 5688.0546-5688.3546 |
| 6154 |  |
16 244.50 | –1.547 | – | – | 6154.1053-6154.3453 |
| 6160 |  |
16 227.30 | –1.246 | – | – | 6160.6270-6160.8670 |
| 7699 |  |
12 985.18 | –0.176 | 486 | 0.232 | 7698.4953-7699.4153 |
Notes. (a)∆E is the energy difference between the levels of the transition, from the NIST database (https://physics.nist.gov/PhysRefData/ASD/lines_form.html; Ralchenko et al. 2005). (b) log (gƒ) are from the VALD database (http://vald.astro.uu.se/; Ryabchikova et al. 2015), where ƒ is the oscillator strength, or transition probability and g is the statistical weight. (c)σ is the broadening cross-section for elastic collisions with hydrogen at a relative velocity of 104m s−1. (d)α is the exponent with which the cross-section σ varies with velocity, that is v−α (Anstee & O’Mara 1995).(e)λint shows the wavelength windows used in the integration for the equivalent width computation.
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