Kenneth G. Carpenter

Densities, Temperatures and Geometric Extents of C II Emitting Regions in the Winds of Luminous, Late-Type Stars

We summarize techniques for using IUE observations of the C II UV 0.01 and UV 1 emission line multiplets at 2325 A and 1335 A to estimate the electron density (Ne) and temperature (Te) in, and the geometric extent of, the chromospheres of late-type stars. The results of applying these techniques to a sample of 15 stars observed with the IUE satellite are discussed.

Weighing supermassive black holes with the UV photon sieve space telescope

The Photon Sieve Space Telescope (PSST) is a space-based ultra high-resolution (5 mas) narrow band (λ/Δλ ≃ 1000) spectral UV imager providing spectral imaging of astronomical objects in Ly - ∝, CIV and NV emission lines. Science obtained with this telescope will revolutionize our understanding of a whole range of astrophysical processes in the local and distant universe. There will be a dramatic increase in the number of observed moderate and large SMBH masses as well as extra-solar protoplanetary disks. The observations will also enable tracing the star formation rates in active galaxies. We present the optical design, the properties and the future implementation of the proposed UV photon sieve space telescope.

An IUE high-dispersion cool-star atlas

We are planning to compile a spectral atlas based on high-dispersion images of representative late-type stars recorded by the International Ultraviolet Explorer. We solicit advice from the ultraviolet community concerning how best to present the spectral material.