Galactic open cluster M37 (IMAGE)

The University of Hong Kong

Galactic open cluster M37

Caption

A contrast enhanced 30°ø30 arcminute quotient (Hα−r band) IPHAS (Drew et al. 2005) mosaic centred on the core of Galactic open cluster M 37 (NGC 2099). The low surface brightness bipolar PN (IPHASX J055226.2+323724) is encompassed by a red circle with a diameter of 445 x 10 arcseconds (the nebular major axis) while the blue circle indicates the full ∼ 30 arcminute extent of the cluster. The PN is well within the cluster tidal radius with the blue CSPN at almost the precise geometric centre of the PN. The CSPN is itself only ∼280 arcseconds from the published cluster center position.

Credit

The University of Hong Kong

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