The ISO-SWS spectrum of P Cygni.

Details The ISO-SWS spectrum of P Cygni. The ISO-SWS spectrum of P Cygni.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315l.229l&link_type=abstract

Astronomy and Astrophysics, v.315, p.L229-L232

Astronomy and Astrophysics

Astrophysics

34

Stars: Early-Type, Stars: Mass-Loss, Stars: Atmospheres, Stars: Supergiants, Stars: Individual: P Cygni

Scientific paper

The free-free IR excess and the IR emission lines of H and He I of the Luminous Blue Variable P Cygni are observed with the ISO-SWS instrument. The observed profiles and the free-free emission are compared with predictions from a non-LTE model atmosphere with a stellar wind. The observations agree very well with a model that has the following properties: T_eff_=18100K, R_*_=76Rsun_, He/H=0.30 by number, ˙(M)=3.0x10^-5^Msun_/yr and vinfinity_=185km/s. We observed forbidden emission lines of [Fe II], [Fe III], [Ni II], [Ne II], [Ne III] and [Si II]. From the study of the [Ne II] and [Ne III] lines we find that the Ne abundance is about three times higher than normal. This may be due to clumping in the CS envelope at r=~10^3^R_*_.

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