A new catalog of H i supershell candidates in the outer part of the Galaxy

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Table 2

Parameters used to estimate the density of supershell candidates in the areas A_a + A_ac.

R _i	R _e	A _ac	A _a	A ₂	A ₃	N ₀	F	N _c	Density
(kpc)	(kpc)	(kpc²)	(kpc²)	(kpc²)	(kpc²)				(kpc^-2)

8.5	9.5	0.26	5.33	2.17	3.16	14^*	2.578	36	6.5 ± 1.1
9.5	10.5	0.78	10.13	7.99	2.14	51^*	1.365	70	6.4 ± 0.8
10.5	11.5	1.31	10.44	−	−	63	1.125	71	6.0 ± 0.7
11.5	12.5	1.83	8.9	−	−	37	1.206	45	4.2 ± 0.6
12.5	13.5	2.36	6.21	−	−	13	1.380	18	2.1 ± 0.5
13.5	14.5	2.02	1.82	−	−	3	2.109	6	1.6 ± 0.6

Notes.

^(*)

For these estimates the structures found within the semicircle of 2 kpc radius around the Sun were not considered.

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