PhysicalPropertiesDistributionofGalaxyPopulationin Abell2142Cluster
ThisworkaimstoinvestigatethephysicalpropertiesofsamplegalaxiesinAbell 2142cluster.Thephotometricandspectroscopicdatausinginthisworkwerecollected fromtheSloanDigitalSkySurvey(SDSS),selectedwithin2criteria;localedwithin100 arcminutesfromAbell2142centreandredshift0.0781≤z≤0.1038foravoideffectof bac...
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| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
เชียงใหม่ : บัณฑิตวิทยาลัย มหาวิทยาลัยเชียงใหม่
2020
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| Online Access: | http://cmuir.cmu.ac.th/jspui/handle/6653943832/69473 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | ThisworkaimstoinvestigatethephysicalpropertiesofsamplegalaxiesinAbell
2142cluster.Thephotometricandspectroscopicdatausinginthisworkwerecollected
fromtheSloanDigitalSkySurvey(SDSS),selectedwithin2criteria;localedwithin100
arcminutesfromAbell2142centreandredshift0.0781≤z≤0.1038foravoideffectof
backgroundandforeground.OurresultrevealsthatgalaxysampleinAbell2142canbe
separatedinto2groupswhichgroupI(0.0781≤z≤0.0850),subclusterconnectingtothe
filamentregion,andgroupII(0.0850 < z ≤0.1038),membersaroundtheclustercentral
region.Moreover,Therelationbetweenapparentmagnitudein g filterbandandcolour
indexsuggestthattheparameter u − z = 3.0canbeuseasacriteriatoseparatesamples
intoblue(u − z ≤ 3.0)andred(u − z > 3.0)sequencegalaxies.Wealsoconsiderthe
starformationactivityinthesample,wedefinedgalaxywiththeequivalentwidthofHα
(EW(Hα) )greaterthan5Åasanactivegalaxyandfoundthatthesampleinsubcluster
connectingtothefilamentregionshowsevidenceofstarformingactivitymorethanthe
sampleinmembersaroundtheclustercentralregion.Thebluesequencegalaxiesalso
tendtobemoreactivegalaxiesthanredsequencegalaxies. |
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