Table 1
Comparison of identifications with HI supershells: the whole Galaxy (the middle section), the 2nd and 3rd quadrants (the right section).
| num | vol. restr. | vol. unrestr. | nu mQ2 + 3 | vol. restr. | vol. unrestr. | |
|
|
||||||
| Heiles (1979), stationary | 46 | 14 (30%) | 33 (72%) | 18 | 6 (33%) | 15 (83%) |
| Heiles (1979), expanding | 17 | 7 (41%) | 9 (53%) | 7 | 4 (57%) | 4 (57%) |
| McClure-Griffiths et al. (2002) | 19 | 10 (53%) | 17 (89%) | 4 | 3 (75%) | 4 (100%) |
Notes. The left section denotes sources, from which previously known HI shells were taken. The middle and right sections give the total number of shells (in the whole Galaxy or in the 2nd and 3rd quadrant, respectively) and the number of shells, which were identified again by our method (percentage of the total is in parentheses). We distinguish two cases: the first, where we demand that sizes of the compared structures are similar (vol. restr.), and the second, where we do not put any restrictions on sizes of the structures (vol. unrestr.).
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