Table 2.
Observed spectral indexes for a set of debris discs.
| System | L* | Ref. | λ1 | λ2 | αmm | Ref. | r | Ref. | T | αPl | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| [L⊙] | [mm] | [mm] | [au] | [K] | |||||||||
| AU Mic | 0.1 | 1 | 1.3 | 9.0 | <2.46 | 1 | 40 | 11 | 26 | 1.87 | |||
| ϵ Eri | 0.3 | 1 | 1.3 | 7.0 | >2.39 | 7 | 69 | 12 | 26 | 1.87 | |||
| HD 61005 | 0.5 | 1 | 1.3 | 9.0 | 2.49 | ± | 0.08 | 1 | 67 | 13 | 30 | 1.89 | |
| HD 107146 | i | 1.0 | 1 | 1.25 | 7.0 | 2.55 | ± | 0.11 | 8 | 50 | 14 | 41 | 1.92 |
| HD 107146 | o | 1.0 | 1 | 1.25 | 7.0 | 2.55 | ± | 0.11 | 8 | 116 | 14 | 27 | 1.88 |
| HD 377 | 1.0 | 1 | 0.87 | 9.0 | >2.39 | 1 | 50 | 15 | 42 | 1.92 | |||
| HD 105 | 1.2 | 2 | 0.87 | 9.0 | 2.41 | ± | 0.16 | 9 | 85 | 2 | 33 | 1.90 | |
| q1 Eri | 1.2 | 1 | 0.87 | 7.0 | 2.94 | ± | 0.10 | 1 | 85 | 15 | 33 | 1.90 | |
| HD 104860 | 1.4 | 1 | 1.3 | 9.0 | 3.08 | ± | 0.23 | 1 | 110 | 16 | 31 | 1.89 | |
| AK Sco | 3.0 | 1 | 1.3 | 7.0 | 2.62 | ± | 0.03 | 1 | 14 | 1 | 103 | 1.97 | |
| HD 15115 | i | 3.3 | 1 | 1.3 | 9.0 | 2.75 | ± | 0.15 | 1 | 48 | 17 | 57 | 1.92 |
| HD 15115 | o | 3.3 | 1 | 1.3 | 9.0 | 2.75 | ± | 0.15 | 1 | 97 | 17 | 40 | 1.92 |
| HD 181327 | 3.3 | 1 | 1.3 | 7.0 | 2.38 | ± | 0.05 | 8 | 86 | 18 | 42 | 1.92 | |
| η Crv | 6.6 | 3 | 0.85 | 9.0 | 2.10 | ± | 0.07 | 10 | 152 | 3 | 38 | 1.91 | |
| HD 95086 | 8.6 | 1 | 1.3 | 7.0 | 2.41 | ± | 0.12 | 1 | 208 | 19 | 35 | 1.91 | |
| β Pic | 8.7 | 1 | 0.87 | 7.0 | 2.81 | ± | 0.10 | 8 | 106 | 20 | 49 | 1.93 | |
| HD 131835 | 10.5 | 4 | 0.87 | 9.0 | 2.17 | ± | 0.13 | 9 | 85 | 21 | 56 | 1.94 | |
| Fomalhaut | 16 | 1 | 1.3 | 7.0 | 2.70 | ± | 0.17 | 1 | 136 | 22 | 50 | 1.93 | |
| 49 Cet | 20 | 1 | 0.85 | 9.0 | 2.76 | ± | 0.11 | 1 | 95 | 23 | 64 | 1.95 | |
| HR 4796 A | 27 | 5, 6 | 0.85 | 9.0 | >2.73 | ± | 0.10 | 9 | 78 | 24 | 73 | 1.96 |
References. (1) MacGregor et al. (2016), (2) Marshall et al. (2018), (3) Marino et al. (2017), (4) Hung et al. (2015b), (5) Gerbaldi et al. (1999), (6) Gaia Collaboration (2016, 2018, parallaxes from Gaia Data Release 2), (7) MacGregor et al. (2015), (8) Ricci et al. (2015), (9) Marshall et al. (2017), (10) Marino et al. (2017), (11) Matthews et al. (2015), (12) Booth et al. (2017), (13) MacGregor et al. (2018), (14) Marino et al. (2018), (15) Liseau et al. (2010), (16) Steele et al. (2016), (17) MacGregor et al. (2019), (18) Marino et al. (2016), (19) Su et al. (2017), (20) Matrà et al. (2019), (21) Hung et al. (2015a), (22) MacGregor et al. (2017), (23) Hughes et al. (2017), (24) Kennedy et al. (2018).
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