A Far-UV Look at Hydrogen-Rich CSPN

Details A Far-UV Look at Hydrogen-Rich CSPN A Far-UV Look at Hydrogen-Rich CSPN

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21560608h&link_type=abstract

American Astronomical Society, AAS Meeting #215, #606.08; Bulletin of the American Astronomical Society, Vol. 36, p.1131

Astronomy and Astrophysics

Astronomy

Scientific paper

We have analyzed far-UV FUSE spectra in conjunction with UV (STIS and IUE) spectra of a sample of Hydrogen-rich CSPN to derive their stellar and wind parameters. The sample spans effective temperatures from 40 to 120kK, showing how the far-UV spectra of H-rich objects change as they evolve through the CSPN phase. For the hottest objects, the only spectral lines showing wind signatures are NeVII 973 and OVI 1032,1038, illustrating the importance of the far-UV spectral region in understanding CSPN during the period where their winds are fading. Some stars have indications of clumped (inhomogeneous) winds, which result in a downward revision in mass-loss rates.
This work has been funded by NASA grants NNX07AH39G and HST-AR-11256.01A.

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