Engineering topics

Mccluskey, G.

Publications and source records attributed to Mccluskey, G..

2 records

NASA NTRS1990

Gas dynamics, accretion, and evolution of Algols: Initial results for three representative systems

IUE (International Ultraviolet Explorer) observations were made around the orbits of three Algol-type binaries: R Arae, U Cephei and Algol. These stars were selected to represent, respectively, the rapid, moderate and slow phases of mass transfer and mass loss in Algols. The data was obtained to derive maps of gas flow and mass loss, to study accretion processes and kinetic heating, and to investigate the importance of magnetic fields in these systems. Continuous observations were made from GSFC and VILSPA over 4 1/3 consecutive days during 10 to 14 Sep. 1989. A total of 100 spectra are obtained. This is the first time that Algol systems are observed continuously over their orbits with IUE. Initial results from this program are discussed.

Gimenez, A.↗

NASA NTRS1980

Ultraviolet observations of 31 and 32 Cygni

Some observations of 31 and 32 Cygni, started in September 1978, at phases 0.62 and 0.17, respectively, are presented. The UV spectrum of 32 Cyg is described both qualitatively and quantitatively. Numerous lines of Si II, O I, C II, Al II and III and Fe II appear with P Cygni characteristics. The LWR-2275 image is dominated by the Mg II 2800 A resonance doublet and numerous Fe II lines in the 2200 - 2700 A region, all showing P Cygni profiles. More quantitatively, ionization modeling for the B star environs was made by comparing observed and computed equivalent widths to deduce density, temperature and turbulence values. At the projected separation between the stars, the log particle density obtained was 7.2, neglecting dust and molecule formation.

Stencel, R. E.↗