**Table 3:** Physical parameters of the plasma in Head and Tail^a.
Parameters	Head	Tail
$n_{\rm e}$ [ ${\rm cm^{-3}}$ ]	0.28 (0.26-0.29)	0.27 (0.23-0.30)
$t_{\rm p}$ [10⁶ yr]	(>1.8)	1.1 (>0.2)
E [ $10^{50}~{\rm erg}$ ]^b	2.9 (2.2-3.7)	0.6 (0.5-0.7)
M [ $M_\odot$ ]	132 (122-137)	89 (76-99)

^a Parentheses indicate single parameter 90% confidence regions.
^b Thermal energy E is estimated to be $3n_{\rm e}VkT$ .

Source LaTeX | All tables | In the text