首页> 中文期刊> 《天文和天体物理学研究:英文版》 >Studies of a possible new Herbig Ae/Be star in the open cluster NGC 7380

Studies of a possible new Herbig Ae/Be star in the open cluster NGC 7380

         

摘要

We present a study of the star 2MASS J22472238+5801214 with the aim of identifying its true nature which has hitherto been uncertain.This object,which is a member of the young cluster NGC 7380,has been variously proposed to be a Be star,a D-type symbiotic and a Herbig Ae/Be star in separate studies.Here we present optical spectroscopy,near-IR photometry and narrow band Hα imaging of the nebulosity in its environment.Analysis of all these results,including the spectral energy distribution constructed from available data,strongly indicate the source to be a Herbig Ae/Be star.The star is found to be accompanied by a nebulosity with an interesting structure.A bow-shock shaped structure,similar to a cometary nebula,is seen very close to the star with its apex oriented towards the photoionizing source of this region (i.e.the star DH Cep).An interesting spectroscopic finding,from the forbidden [SII] 6716,6731  and [OI] 6300  lines,is the detection of a blue-shifted high velocity outflow (200 ±50 km s-1) from the star.

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