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Table 4

Properties of NGC 7252 and its tidal tails.

Component H I  velocities MH I MH2 LB
(km s-1) (109 M) (109 M) (109L)

Remnant 45964618 0.25 3.5 51.6
ET 47454835 2.0 0.9
NWT 46604830 3.2 >0.02 2.9
Global 45964837 5.45 >3.52 55.4

Notes. The H I  mass and velocities of the remnant refer to the so-called Western Loop (see Fig. A.1). Molecular masses are calculated assuming XCO = 2.0 × 1020 (cm-2/ K km s-1) and using the CO fluxes from Dupraz et al. (1990) and Braine et al. (2001). For the NWT the molecular mass is a lower limit because single-dish observations cover only a fraction of the tail. B-band luminosities are taken from Hibbard et al. (1994) and rescaled to a distance of 66.5 Mpc.

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