Table 4.
Distance of the obscurers to the black hole (Eq. (2)) with MBH = 5.96 × 106 M⊙ (Bentz & Katz 2015). M14 and B15 are short for Markowitz et al. (2014) and Beuchert et al. (2015), respectively.
| Event | 2000 − 2001 | 2002 | 2006-12-03 | 2008 | 2016-12-09a | 2016-12-09b | 2019-11-15 | 2019-12-05 |
|---|---|---|---|---|---|---|---|---|
| Ref. | M14 | M14 | Paper II | B15 | Paper II | Paper II | Paper III | Paper III |
| Lion (erg s−1) | 1043 | 1043 | 19.1 × 1042 | 8.9 × 1042 | 23.5 × 1042 | 23.5 × 1042 | 11.7 × 1042 | 5.8 × 1042 |
| tcross (day) | 77 − 94 | 13.3 | 0.23 − 372 | ≳35 | 0.45 − 3.53 | ∼0.23 | 1.2 − 50 | ≳0.58 − 127 |
| NH (1022 cm−2) | 19 − 26 | 13.3 | 1.98 | 11.2 | 8.27, 1.25 | 1.33 | 3.5 | 8.3 |
| log ξ | 0.0, −0.3 | 0.0 | 1.55 | 1.1 | 2.81, 1.02 | 1.89 | 0.4 | 2.0 |
| f = 0.1 (stream line) | ||||||||
| r (ld) | 144 − 156, 189 − 205 | 42 − 66 | 12 − 222 | 48 − 73 | 2.9 − 6.7, 32 − 73 | ∼11 | 36 − 162 | 2.0 − 17 |
| ne(108 cm−3) | 0.6 − 0.7, 0.7 − 0.8 | 3.4 − 8.5 | 0.02 − 6.0 | 0.2 − 0.5 | 1.2 − 6.5, 0.6 − 3.2 | ∼3.9 | 0.2 − 4.3 | 0.07 − 5.3 |
| Radial size (102 RS) | 18 − 21 , 15 − 18 | 0.9 − 2.2 | 0.2 − 69 | 14 − 32 | 0.7 − 3.8 , 0.2 − 1.1 | ∼0.2 | 0.5 − 11 | 1.1 − 84 |
| f = 1 (spherical cloud) | ||||||||
| r (ld) | 57 − 62, 75 − 82 | 17 − 26 | 4.6 − 88 | 19 − 29 | 1.2 − 2.7, 13 − 29 | ∼4.3 | 14 − 65 | 0.8 − 7.0 |
| ne(109 cm−3) | 0.4 − 0.5, 0.4 − 0.5 | 2.1 − 5.3 | 0.01 − 3.8 | 0.1 − 0.3 | 0.8 − 4.1, 0.4 − 2.0 | ∼2.5 | 0.1 − 2.7 | 0.04 − 3.4 |
| Radial size (RS) | 281 − 329, 245 − 287 | 14 − 35 | 3.0 − 1092 | 221 − 511 | 12 − 60, 3.5 − 18 | ∼3.1 | 8.4 − 172 | 18 − 1328 |
| f = 10 (flatbread) | ||||||||
| r (ld) | 23 − 25, 30 − 33 | 6.7 − 11 | 1.8 − 35 | 7.6 − 12 | 0.5 − 1.1, 5.1 − 12 | ∼1.7 | 5.7 − 26 | 0.3 − 2.8 |
| ne(109 cm−3) | 2.4 − 2.9 , 2.8 − 3.3 | 13 − 34 | 0.06 − 24 | 0.8 − 1.8 | 5.0 − 26 , 2.5 − 13 | ∼15 | 0.8 − 17 | 0.3 − 21 |
| Radial size (RS) | 44 − 52 , 39 − 45 | 2.2 − 5.6 | 0.5 − 173 | 35 − 81 | 1.8 − 9.5 , 0.6 − 2.9 | ∼0.5 | 1.3 − 27 | 2.8 − 210 |
| f = 3000 (flatbread) | ||||||||
| r (ld) | 2.3 − 2.5, 3.1 − 3.3 | 0.7 − 1.1 | 0.2 − 3.6 | 0.8 − 1.2 | 0.05 − 0.1, 0.5 − 1.2 | ∼0.2 | 0.6 − 2.6 | 0.03 − 0.3 |
| ne(1011 cm−3) | 2.3 − 2.8, 2.7 − 3.2 | 13 − 32 | 0.06 − 23 | 0.8 − 1.7 | 4.8 − 25, 2.4 − 12 | ∼15 | 0.8 − 16 | 0.3 − 20 |
| Radial size (RS) | 0.46 − 0.54 , 0.40 − 0.47 | 0.02 − 0.06 | 0.005 − 1.8 | 0.36 − 0.85 | 0.02 − 0.10 , 0.01 − 0.03 | ∼0.01 | 0.01 − 0.3 | 0.03 − 2.2 |
Notes. Distances are calculated for three representative geometries: a stream line (f = 0.1), a spherical cloud (f = 1), and a flatbread (f = 10). When multiple obscuration events occur on the same day, we use lower case letters (a and b here) to differentiate them from single events. We caution that the ionization parameter of 2019-12-05 (L), marked with †, is poorly constrained (Table 3).
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