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Paper: Probing the Density Structure of 48 Librae's Circumstellar Disk
Volume: 506, Bright Emissaries: Be Stars as Messengers of Star-Disk Physics
Page: 287
Authors: Silaj, J.; Jones, C.E.; Carciofi, A.C.; Escolano, C.; Tycner, C.
Abstract: 48 Librae is a well-known Be shell star that exhibits spectacular cyclic V/R asymmetries in its Balmer emission lines. In this work, we use the HDUST code to investigate the disk density structure required to produce this signature. By modelling one representative Hα profile, we obtain the two initial densities required to match each peak, and from this we infer the average initial disk density. Furthermore, we investigate the parameters of the central star by modelling the SED, and we constrain the inclination angle of the system with polarization measurements. We find 48 Lib is best represented by a B3V central star surrounded by a very dense disk with an average initial density of 1.1×10–10 g cm–3, and that the system is oriented at 85°.
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