Table 5
Results of spectral analyses of H1504+65 and RX J0439.8−6809.
| H1504+65 | RX J0439.8 | Reference | |
|
|
|||
| Teff /kK | 200 ± 20 | 250 ± 30 | (1), this paper |
| log g/cm s-2 | 8.0 ± 0.5 | 8.0 ± 0.5 | (2) |
| M/M⊙ |
|
|
this paper |
| d/kpc |
|
|
this paper |
| | z |/kpc |
|
|
this paper |
| He | <0.01 | (1) | |
| C | 0.46 | 0.50 | (2), this paper |
| N | < 3.0 × 10-5 | < 1.0 × 10-3 | this paper |
| O | 0.46 | 0.50 | (2), this paper |
| Ne | 0.06 | 0.01 | (3, 4, 5), this paper |
| Na | < 0.1 | (4) | |
| Mg | 0.02 | (4) | |
| Al | < 0.1 | (4) | |
| Si | < 2.6 × 10-3 | this paper | |
| Ca | < 6.4 × 10-5 | (6), this paper | |
| Fe | 0.0013 | (7) | |
Notes. Abundances in mass fractions. Stellar mass M and distance d were derived from comparison with evolutionary tracks. z is the distance from the Galactic disk.
Reference. The last column gives references to results for H1504+65; results for RX J0439.8−6809 from this paper. (1) Werner et al. (2004b); (2) Werner (1991); (3) Werner & Wolff (1999); (4) Werner et al. (2004b); (5) Werner et al. (2007); (6) Werner et al. (2008); (7) Werner et al. (2010).
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