Analysis of the Photospheric Lines of the Magnetic CP Star HR 7575

Publications of the Astronomical Society of Japan

Sadakane, Kozo²  Kato, Ken-ichi¹ 

[1] Osaka Science Museum, Nakanoshima, Kita-ku, Osaka 530-0005 E-mail (KK):;Astronomical Institute, Osaka Kyoiku University, Asahigaoka, Kashiwara, Osaka 582-8582

关键词: Abundances;    "Stars: individual (HR 7575)";    "Stars: magnetic";    "Stars: peculiar A";   

DOI  :  10.1093/pasj/51.1.23

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

ThephotosphericlinesinthevisualregionofthecoolmagneticCPstarHR7575havebeenanalyzedusingahigh-dispersionspectrogramobtainedattheDominionAstrophysicalObservatory.Thefullyline-blanketedATLAS9modelatmospheresof10-timesthesolarmetalcontentwereemployedtocalculatetheelementalabundances.TheeffectivetemperatureTeff,derivedfromtheopticalandultravioletenergydistributions,pointsto8500±300K,whiletheionizationbalanceofironisnotreproducedatthiseffectivetemperature.TheabundancesderivedfromindividualCrI,CrII,andFeIIlinesapparentlydependontheireffectiveLandefactors.ThisimpliesthattheCrandFelinesareintensifiedbythestrongmagneticfieldonHR7575.Theirabundanceenhancementisestimatedtobeabout0.7dexbasedonacomputationoftheUnno-Beckersequation.TheoverallabundancepatternsofHR7575arecomparabletoothercoolmagneticCPstars.Oftheanalyzedelements,onlyMgandSchavenearlysolarabundances,whileCr,Mn,Sr,andrareearthsareoverabundantby1to5dex.

【 授权许可】

Unknown