Quantifying the scale of star formation across the Perseus spiral arm using young clusters around Cas OB5

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Table 2

Linear expansion gradients and corresponding expansion ages for our 17 identified OCs.

Cluster	Linear expansion gradients (km s⁻¹ pc⁻¹)		Linear expansion ages (Myr)
Cluster
l	b	l	b
1	−0.205 ± 0.001	0.047 ± 0.001	−	21 ± 1
2	0.014 ± 0.006	−0.006 ± 0.001	$71_{- 21}^{+ 54}$ $\[71_{-21}^{+54}\]$	−
3	${0.051}_{- 0.003}^{+ 0.005}$ $\[0.051_{-0.003}^{+0.005}\]$	0.077 ± 0.001	$20_{- 2}^{+ 1}$ $\[20_{-2}^{+1}\]$	13 ± 1
4	${0.081}_{- 0.004}^{+ 0.006}$ $\[0.081_{-0.004}^{+0.006}\]$	0.005 ± 0.001	12 ± 1	$200_{- 33}^{+ 50}$ $\[200_{-33}^{+50}\]$
5	${0.022}_{- 0.005}^{+ 0.007}$ $\[0.022_{-0.005}^{+0.007}\]$	0.012 ± 0.001	$45_{- 11}^{+ 14}$ $\[45_{-11}^{+14}\]$	$83_{- 13}^{+ 7}$ $\[83_{-13}^{+7}\]$
6	0.040 ± 0.002	0.057 ± 0.001	25 ± 1	17 ± 1
7	0.033 ± 0.005	0.011 ± 0.002	$30_{- 4}^{+ 6}$ $\[30_{-4}^{+6}\]$	$91_{- 14}^{+ 20}$ $\[91_{-14}^{+20}\]$
8	$- {0.008}_{- 0.003}^{+ 0.002}$ $\[-0.008_{-0.003}^{+0.002}\]$	0.011 ± 0.001	−	$91_{- 7}^{+ 9}$ $\[91_{-7}^{+9}\]$
9	$- {0.024}_{- 0.031}^{+ 0.019}$ $\[-0.024_{-0.031}^{+0.019}\]$	0.062 ± 0.005	−	$16_{- 1}^{+ 2}$ $\[16_{-1}^{+2}\]$
10	${0.024}_{- 0.004}^{+ 0.005}$ $\[0.024_{-0.004}^{+0.005}\]$	0.012 ± 0.001	$42_{- 5}^{+ 8}$ $\[42_{-5}^{+8}\]$	$83_{- 6}^{+ 8}$ $\[83_{-6}^{+8}\]$
11	$- {0.011}_{- 0.014}^{+ 0.011}$ $\[-0.011_{-0.014}^{+0.011}\]$	0.015 ± 0.002	−	$67_{- 8}^{+ 10}$ $\[67_{-8}^{+10}\]$
12	${0.014}_{- 0.013}^{+ 0.014}$ $\[0.014_{-0.013}^{+0.014}\]$	$- {0.006}_{- 0.004}^{+ 0.003}$ $\[-0.006_{-0.004}^{+0.003}\]$	−	−
13	$- {0.041}_{- 0.009}^{+ 0.012}$ $\[-0.041_{-0.009}^{+0.012}\]$	−0.001 ± 0.002	−	−
14	0.022 ± 0.009	−0.001 ± 0.002	$45_{- 13}^{+ 32}$ $\[45_{-13}^{+32}\]$	−
15	${0.166}_{- 0.013}^{+ 0.016}$ $\[0.166_{-0.013}^{+0.016}\]$	0.012 ± 0.003	6 ± 1	$83_{- 16}^{+ 18}$ $\[83_{-16}^{+18}\]$
16	${0.070}_{- 0.004}^{+ 0.006}$ $\[0.070_{-0.004}^{+0.006}\]$	0.021 ± 0.002	14 ± 1	$48_{- 4}^{+ 5}$ $\[48_{-4}^{+5}\]$
17	$- {0.070}_{- 0.013}^{+ 0.014}$ $\[-0.070_{-0.013}^{+0.014}\]$	0.011 ± 0.004	−	$91_{- 24}^{+ 52}$ $\[91_{-24}^{+52}\]$

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