Period luminosity Relation

Period luminosity Relation#

Dereddening#

Any magnitude is susceptible to its environmental factor and redenning due to dust in the line of sight is one of them. One method to deredden your observed magnitudes is to calculate the Weisenheit magnitude.

[ m_W = m - R(m_v - m_I) ]

Metalicity#

To correct for the variable star’s metalicity (\(\log[O/H]\)), we fit for this linearly [ m’ = m(P;\alpha, \beta) + Z \Delta\log[O/H] ]

  • \(Z\): Metalicity free parameter

Contents