Nova Ophiuchi 1993
Abstract
C. E. Woodward, University of Wyoming; M. A. Greenhouse, National Air and Space Museum; and D. Van Buren, California Institute of Technology, write: "Spectroscopy of N Oph 1993 obtained on June 2.3 UT (62 days after outburst; cf. IAUC 5765) with the Kitt Peak National Observatory 2.1-m telescope (+ CRSP) reveals the following infrared coronal lines (wavelengths listed are observed values, with uncertainty in the last digit given in parentheses): [Ca VIII] 2.322(2)-microns (2P1/2-2P3/2) and [Si VII] 2.470(2)-microns (3P2- 3P1). Emission from hydrogen (Brackett-gamma 2.169(1)-microns) and helium (He I 2.060(2)-microns) also were present in the spectra. The observed integrated intensities were (in units of 10E-19 W/cm2): Brackett-gamma, 1.06 +/- 0.01; [Ca VIII], 0.26 +/- 0.05; [Si VII], 0.65 +/- 0.13. The lines were velocity-resolved at about 3600 km/s FWHM. The rapid onset of coronal line emission in N Oph 1993 is similar to that observed in V1500 Cyg and V446 Her. Further spectroscopy is encouraged."
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- July 1993
- Bibcode:
- 1993IAUC.5836....2W