They certainly are cluster members. A fit of Arpa#39;s two-colour- index diagram yields EB_V = m.040 and ECu = m.01 5. The ratio of these excesses is in accord with the ratio 0.38 given by Stoy. The last column of Table 5 gives the spectral typesanbsp;...

Title | : | Bulletin of the Astronomical Institutes of the Netherlands |

Author | : | |

Publisher | : | - 1959 |

Continue