Multi-Slit Imaging Spectroscopy Technique: Catalog of Intracluster Planetary Nebulae in the Coma Cluster

[摘要] Withanewmulti-slitimagingspectroscopy(MSIS)techniquepioneeredatthe8.2mSubarutelescopeandtheFaintObjectCameraandSpectrograph,wedetectandmeasuretheline-of-sightvelocitiesof40intraclusterplanetarynebulacandidatesassociatedwiththediffuseintraclusterpopulationofstarsintheComaclustercore,atnearly100Mpcdistance.Wedescribethemethodforextractingthesingletwo-dimensionalspectrafromtheMSISimage,discussthecriteriafortheidentificationoftheemissionlineobjects,anddescribetheproceduretocomputetheir$$alpha,delta$$(J2000)coordinates.Wepresentthecatalogoftheintraclusterplanetarynebulacandidates,theirspatiallocationinthesurveyedfield,andtheirdistributioninthevelocity–magnitudeplane.Finally,wecommentonpossiblepopulationeffectsandtheuseoftheseplanetarynebulaetoconfirmthedistancetotheComacluster.

[学科分类] 天文学(综合)

[关键词] catalogs;"cosmology: galaxy clusters";"planetary nebulae: general";"methods: data analysis";"techniques: image processing;spectroscopy"