Table 2 Positional, atmospheric and orbital parameters for WDJ181058.67+311940.94
From: A super-Chandrasekhar mass type Ia supernova progenitor at 49 pc set to detonate in 23 Gyr
Parameter | Unit | Value | Uncertainty |
|---|---|---|---|
Right ascension | deg (2016) | 272.744360834 | ±0.000000005 |
Declination | deg (2016) | 31.327961071 | ±0.000000005 |
Reference epoch | hjd (utc) | 2,458,587.6663 | ±0.0018 |
Orbital period | day | 0.5931479 | ±0.0000009 |
Gaia parallax | mas | 20.438 | ±0.023 |
Fitted parallax | mas | 20.402 | ±0.003 |
Primary temperature | K | 17,260 | +1,380/−880 |
Secondary temperature | K | 20,000 | +400/−2,000 |
Primary surface gravity | dex | 8.350 | +0.066/−0.052 |
Secondary surface gravity | dex | 8.164 | +0.027/−0.030 |
Primary mass | M⊙ | 0.834 | ±0.039 |
Secondary mass | M⊙ | 0.721 | ±0.020 |
System mass | M⊙ | 1.555 | ±0.044 |
Primary semi-amplitude | km s−1 | 93.9 | ±2.0 |
Secondary semi-amplitude | km s−1 | 95.7 | ±2.1 |
Primary velocity offset | km s−1 | 50.0 | ±1.5 |
Secondary velocity offset | km s−1 | 53.5 | ±1.6 |
Merger time | Gyr | 22.6 | ±1.0 |
