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Table 5

Spectrophotometric data and resulting metallicities in the tidal tails of NGC 7252.

Region NGC 7252NW NGC 7252E H iiET H iiW

RA(J2000) 22° 20m 33.6s 22° 20m 56.1s 22° 20m 59.3s 22° 20m 41.2s
Dec(J2000) 24° 37 24′′ 24° 41 9′′ 24° 41 11′′ 24° 40 45′′
[OII]λ3727 331±66 ... 237±40 256±49
Hδ 28±5 ... 28±5 24±4
Hγ 47±5 ... 52±6 47±5
Hβ 100±2 100±6 100±5 100±2
[OIII]λ4959 37±2 53±5 41±5 29±2
[OIII]λ5007 109±4 150±9 125±5 89±4
[NII]λ6548 25±5 23±6 ... ...
Hα 285±30 233±28 ... ...
[NII]λ6584 62±10 58±11 ... ...
[SII]λ6717 51±10 42±8 ... ...
[SII]λ6717 33±9 33±9 ... ...
12+log(O/H):
– [N ii]/Hα (Denicoló et al. 2002) 8.6 8.6 ... ...
– R23 (Pilyugin 2000) 8.55 ... 8.65 8.7
– R23 (Kuzio de Naray et al. 2004) 8.7 ... 8.8 8.8

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