Table 6.
Comparison of T Tau with some other CTTSs and HAe stars that have high-resolution X-ray grating spectroscopy.
| System | M⋆ (M⊙) | R⋆ (R⊙) | Rotation Period (d) | Rcoa (au/R⋆) |  |
typical Ṁ (M⊙ yr−1) | Spot covering fraction (%) | Inclination (°) | Refs. |
|---|---|---|---|---|---|---|---|---|---|
| TW Hya | 0.7 | 0.8 | 4.7 | 0.05/13 | 2.6 | a few 10−9 | 1.1 | ∼ face-on | 10, 4, 5 |
| RU Lup | 0.8 | 1.7 | 3.7 (?) | 0.04/5.5 | (perhaps 3) | 4 × 10−8 | 7, 8, 9, 11 | ||
| BP Tau | 0.8 | 2.1 | ≈8.3 | 0.07/7.6 | 2.1–2.2 | 2.9 × 10−8 | 2.2 | 4, 12, 13, 14, 15 | |
| MP Mus | 1.2 | 1.3 | 5.8 | 0.07/11 | – | 5 × 10−9 | 45 | 24, 25 | |
| T Tau | 2.2 | 3.6 | 2.5 | 0.05/3 | 2.6 | 10−7 | 3.3 | ∼ face-on | 1, 2, 3, 23 |
| HD 163296 | 2.2 | 2.3 | (2.1?) | 0.02/1.6 | <0.1 | a few 10−7 | 1.8 | 38 | 16, 17, 21, 22 |
| AB Aur | 2.5 | 2.6 | (≈2?) | 0.04/3.5 | <0.2 | 1.4 × 10−7 | 40 | 18, 19, 20, 22 |
Notes.
References. (1) Güdel et al. (2007b); (2) Podio et al. (2014); (3) Bouvier et al. (1995); (4) Johns-Krull (2007); (5) Dupree et al. (2012); (7) Lamzin et al. (1996); (8) Stempels & Piskunov (2002); (9) Herczeg et al. (2005) and references therein; (10) Brickhouse et al. (2010) and references therein; (11) Siwak et al. (2016); (12) Johns-Krull et al. (1999); (13) Xiao et al. (2012); (14) Furlan et al. (2011); (15) Ingleby et al. (2013); (16) Mendigutía et al. (2012); (17) de Gregorio-Monsalvo et al. (2013); (18) Garcia Lopez et al. (2006); (19) Cauley & Johns-Krull (2015) and references therein; (20) Fairlamb et al. (2015); (21) Alecian et al. (2013); (22) Deleuil et al. (2005); (23) Calvet et al. (2004); (24) Batalha et al. (1998); (25) Pascucci et al. (2007).
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