Internal dynamics of Abell 1240: a galaxy cluster with symmetric double radio relics

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Volume 503 / No 2 (August IV 2009)

A&A, 503 2 (2009) 357-371

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Table 2:

Global properties of galaxy systems.
System	$N_{\rm g}$	$\alpha,~\delta$	$\langle v\rangle$	$\sigma _{\rm V}$	$R_{\rm vir}$	M(< $R_{\rm vir})$
		(J2000)	${\rm km~ s^{-1}}$	${\rm km\ s^{-1}}$	$h_{70}^{-1}~{\rm Mpc}$	$h_{70}^{-1}10^{14}~{M}_{\odot}$
A1237	27	112329.5+425419	$58021\pm145$	$\rm 738_{-54}^{+82}$	1.6	$6\pm2$
A1240	62	112337.6+430551	$58408\pm111$	$\rm 870_{-79}^{+91}$	1.9-2.4^b	9-19^b
${\rm A1240N}^{a}$	32	112335.2+430832	$\sim$ 58353	$\rm 709_{-83}^{+88}$	1.6	$5\pm2$
${\rm A1240S}^{a}$	27	112337.7+430328	$\sim$ 58817	$\rm 991_{-99}^{+149}$	2.2	$14\pm5$

^a As center and mean velocity of this clump we list the position and velocity of the respective brightest galaxy.
^b The lower limit comes from the observed $\sigma _{\rm V}$ . The upper limit is obtained when considering the bimodal structure of the cluster (see text).

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