Ultraviolet studies of nova-like variables with the IUE. Final report, April 1981-September 1983

Technical Report · Thu Sep 01 04:00:00 EDT 1983

OSTI ID:6575827

Guinan, E F

KQ Mon is a new UX UMa-type nova-like variable. Optical spectra taken in 1978 reveal very shallow Balmer absorption lines and He I (wavelength 4471) absorption. There was no evidence of orbital variations but the appearance of the optical spectrum and the presence of low amplitude flickering suggested a strong similarity to CD-42 degrees 14462 ( V3885 Sgr) and other members of the UX UMa class. KQ Mon was observed at low dispersion with the IUE satellite. Six spectra taken with the short wavelength prime (SWP) camera are dominated by strong broad absorption lines due to N V, O I, Si III, Si IV, C IV, He II, N IV, and A1 III. There is little evidence of orbital phase modulation over the time baseline of the observations. Unlike UV observations of other UX UMa-type objects, KQ Mon exhibits no emission lines or P Cygni-type profiles and the velocity displacements appear to be smaller, suggesting the absence of a hot, high velocity wind characterizing other UX UMa stars. The relationship of KQ Mon to other UX UMa disk stars is discussed and a model is suggested to explain their observed properties and the lack of major outbursts.

• Research Organization: Villanova Univ., PA (USA)
• OSTI ID: 6575827
• Report Number(s): N-84-17080; NASA-CR-173268
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ACCRETION DISKS
BALMER LINES
ELECTROMAGNETIC RADIATION
FLUID FLOW
GAS FLOW
RADIATIONS
RED SHIFT
SPECTRA
STARS
ULTRAVIOLET RADIATION
VARIABLE STARS