Table 5.
Main characteristics of the DBV star GD 358.
Quantity | Spectroscopy | BW94 | DK95 | MEA00 | MEA01 | FB02 | M03 | BKEA19 | Seismology |
---|---|---|---|---|---|---|---|---|---|
astrometry | (this work) | ||||||||
Teff [K] | 24 000 ± 500 (a) | 24 000 | 24 121 | 22 600 | 22 600 | 24 800 | 22 900 | 23 650 | 24 967 ± 200 |
24 937 ± 1018 (b) | |||||||||
log g [cm s−2] | 7.78 ± 0.05 (a) | 8.0 | ⋯ | ⋯ | ⋯ | 8.02 | ⋯ | ⋯ |
![]() |
7.92 ± 0.05 (b) | |||||||||
M⋆ [M⊙] | 0.508 ± 0.050 (c) | 0.61 | 0.58 | 0.605 | 0.65 | 0.625 | 0.66 | 0.571 |
![]() |
0.560 ± 0.028 (d) | |||||||||
log(L⋆/L⊙) | ⋯ | −1.30 | ⋯ | ⋯ | ⋯ | −1.25 | ⋯ | −1.287 | −1.215 ± 0.015 |
log(R⋆/R⊙) | ⋯ | −1.90 | ⋯ | ⋯ | ⋯ | −1.89 | ⋯ | ⋯ | −1.880 ± 0.014 |
XO (center) | ⋯ | 0.50 | 0.50 | 0.80 | 0.84 | 0.00 | 0.67 | 0.50 | 0.77 |
log(1 − Menv/M⋆) | ⋯ | ⋯ | −2.6 | −2.74 | −2.74 | −2.97 | ⋯ | −2 | −1.6 |
log(1 − MHe/M⋆) | ⋯ | −5.70 | −6.0 | −5.97 | ⋯ | −5.80 | −2.0 | −5.5 | −5.98 |
d [pc] | 36.6 ± 4.5 (b) | 42 | ⋯ | ⋯ | ⋯ | 43 | ⋯ | 44.5 | 42.85 ± 0.73 |
43.02 ± 0.04 (e) |
Notes. The second column corresponds to spectroscopic and astrometric results, whereas the third, fourth, fifth, sixth, seventh, and eighth columns present the results from the seismological studies of BW94 (Bradley & Winget 1994), DK95 (Dehner & Kawaler 1995), MEA00 (Metcalfe et al. 2000), MEA01 (Metcalfe et al. 2001), FB02 (Fontaine & Brassard 2002), M03 (Metcalfe 2003), and BKEA19 (Bischoff-Kim et al. 2019), respectively, and the last column presents the seismological results from the present work.
References.
From the evolutionary tracks and the Teff and log g values of Nitta et al. (2012);
From the evolutionary tracks and the Teff and log g values of Bédard et al. (2017);
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