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HD 37806

Slavek Rucinski

Halifax 2010

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Ae/Be Herbig star

In the Sigma Ori cluster field. Orion OB1b association.

Young, moderately massive: 1.5 – 5 solar mass.

A2Vpe. V ~ 7.95. MV ~ +0.2. ~350 pc (420 pc)

HD 37806, known also as MWC 120

One of first radio stars (Algonquin telescope 1973).

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MOST light curve

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MOST amplitude spectrum

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ESO 1985 – 1986; ASAS 2001 - 2009

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MOST data: Morlet-6 wavelet

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MOST data: DOG-2 wavelet

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MOST data: Scalegram (DOG-2 wavelet)

Stochastic self-similar noise process: X(λt) = λαX(t)

The slope implies α ≈ 1.5, same for cataclysmic binaries.

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The paper

MNRAS: failure, insufficient interpretation and conclusions.

A&Ap: A good, positive review, but… - Expand on interpretation. - Explain why not pulsations, eclipses, spots. - Include Hp data? Use raw TYCHO, if available. - The star is a binary! Recent paper, MNRAS 2010