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Title Observations of the circumstellar gas shells around Betelgeuse and Antares
Creator/Author Bernat, A.P. ; Lambert, D.L.
Publication Date1975 Nov 01
OSTI IdentifierOSTI ID: 4113741
Other Number(s)CODEN: AJLEA
Resource TypeJournal Article
Resource RelationAstrophys. J., Lett., v. 201, no. 3, pp. L153-L156
Research OrgUniv. of Texas, Austin
SubjectN56200 --Physics (Astrophysics & Cosmology)--Stars; 640102 --Physics Research--Astrophysics & Cosmology--Stars; GIANT STARS-- STELLAR ATMOSPHERES;EMISSION;INFRARED RADIATION;LINE WIDTHS;PHOTOMETRY;PHOTOSPHERE
Description/Abstract K i resonance line (lambda7699) emission has been detected from the circumstellar gas shell surrounding Betelgeuse ($alpha$ Ori).A shell diameter of 4''--8'' (80--160 stellar radii) is indicated.New observations of the Ca ii infrared triplet line cores are used to obtain a lower limit to the Ca$sup +$ (and, hence, K i) shell radius.The 8542 A line in $alpha$ Ori does not show a circumstellar absorption core, and the shell radius limit, R/sub shell/greater than or equal to31 R/sub star/, is estimated.A 108 mA circumstellar core is seen in the 8542 A line in Antares ($alpha$ Sco), and a shell radius R/sub shell/approx.=4.0 R/sub star/ is suggested.(AIP)
Country of PublicationUnited States
LanguageEnglish
System Entry Date2001 Jun 03

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