Publications of the Astronomical Society of Japan | |
Analysis of the Photospheric Lines of the Magnetic CP Star HR 7575 | |
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
【 预 览 】
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