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Nominal Parameters

  l Car δ Ceph FF Aql
Period 35.54804 5.366316 4.470916 (first overtone)
Distance 560 +- 23 pc 273 +- 11 pc TBD
Mv -5.58 -3.47 TBD
Mi -6.53 -4.13 TBD
E(B-V) 0.169 0.072 0.219
<B> 5.009 4.611 6.128
<V> 3.729 3.958 5.372
<Ic> 2.557 3.208 4.510
<J> 1.675 2.689 3.929
<H> 1.200 2.378 3.575
<K> 1.079 2.305 3.489

NB1 : values used for absorption corrections :

Rv = 3.07 + 0.28 (B-V)0 + 0.04 E(B-V)
η = E(V-I)/E(B-V) = 1.250 [1 + 0.06 (B-V)0 + 0.014 E(B-V)]
Av = Rv E(B-V)
Ai = (Rv - η) E(B-V)

The IR values are derived from Fitpatrick (1999, PASP 111, 63) :

Aj = 0.276 Av
Ah = 0.170 Av
Ak = 0.112 Av

NB2 : For the absolute magnitude of δ Ceph , the Lutz-Kelker correction of Benedict is used: -0.015

 

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