3D dynamics of the Orion cloud complex - Discovery of coherent radial gas motions at the 100-pc scale

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Table 1.

Overview of the discussed 14 subregions, including the cluster Orion X.

Label	Region	Subregion	l	b	α	δ	σ_α	σ_δ
			(deg)	(deg)	(deg)	(deg)	(deg)	(deg)
1	Orion A (tail)	L1647-S	214.41	−19.87	85.64	−10.17	0.10	0.09
2	Orion A (tail)	L1647-N	213.53	−19.67	85.46	−9.33	0.33	0.25
3	Orion A (tail)	L1641-S	212.64	−19.18	85.53	−8.37	0.27	0.24
4	Orion A (tail)	L1641-S/C	211.76	−19.23	85.12	−7.64	0.35	0.24
5	Orion A (tail)	L1641-C	210.88	−19.47	84.54	−7.00	0.34	0.25
6	Orion A (head) ^(a)	L1641-N	209.99	−19.63	84.01	−6.33	0.29	0.25
7	Orion A (head)	OMC-4/5	209.38	−19.65	83.74	−5.82	0.24	0.16
8	Orion A (head)	OMC-1	209.05	−19.43	83.79	−5.45	0.21	0.15
9	Orion A (head)	OMC-2/3	208.72	−19.20	83.86	−5.06	0.26	0.15
10	Orion B (main)	L1630-S	206.59	−16.35	85.46	−1.95	0.17	0.27
11	Orion B (main)	L1630-N	205.25	−14.22	86.73	0.19	0.17	0.21
12	Orion B (cometary)	L1622	204.77	−11.90	88.56	1.70	0.07	0.07
13	Outlying Cloud (cometary)	L1616	203.50	−24.70	76.72	−3.33	0.20	0.12
14	Outlying Cloud (cometary)	IC2118	206.38	−25.94	76.84	−6.21	0.10	0.10
15	Cluster ^(b)	Orion X	206.04	−21.95	80.25	−4.09	1.29	1.44

Notes. The table lists average cloud positions in l, b, as well as α, δ, and contains the standard deviation in α, δ which was used to estimate traceback errors.

^(a)

L1641-N is connecting Orion A’s head and tail, while we count it here to the head.

^(b)

The cluster Orion X is included in this table for completeness. It is used to set the center position of the coordinate frame in Figs. 7–9.

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