Plate 22: 17 Lep: an A–Type Shell Star

Star Index

Plate 22: 17 Lep: an A–Type Shell Star

The complex shell phenomena in 17 Lep were first described by Struve (Ap.J., 76, 85, 1932). The intensities of Ti II and Fe II lines resemble, in general, those in α Cyg: but the broad hydrogen wings show that 17 Lep is not a supergiant. The sharp absorptions are located in an expanding shell; and the lines vary — both in intensity and in position. The low–level Ti II lines near λλ 3685 and 3760 are outstanding in intensity in 17 Lep.

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