Nova Scorpii 1992
Abstract
A. Damineli N., Instituto Astronomico e Geofisico, Universidade de Sao Paulo; F. Jablonsky, Instituto de Pesquisas Espaciais, San Jose dos Campos; and M. P. Diaz, Instituto Astronomico e Geofisico, Universidade de Sao Paulo, write: "We have obtained low- resolution (1 nm) CCD spectrograms of Nova Sco 1992 covering the range 480-1090 nm, using the 1.6-m telescope of LNA/CNPq in Brazil. On May 28.0 UT, the visible spectrum was like that described on IAUC 5529 and the near-infrared was characterized by strong emission of O I at 844.6 nm and the Ca II triplet. Less intense emission of Fe II (74, 49, 42), N I, and Paschen lines were also present. An unidentified blend at 1069-1076 nm was the dominant feature in the spectrum, being stronger than H-alpha. Coude CCD spectra (resolution 0.1 nm) taken on June 1.1 show P-Cyg absorptions with minima at -290 km/s (O I at 844.6 nm), -355 km/s (Ca II triplet), and -345 km/s (H-alpha). Lines not showing P-Cyg profiles have FWHM 700 km/s. The coude spectra give the following equivalent widths in nm: H-beta, -7.3; H-alpha, -46.6; O I at 844.6 nm, -10.2; Ca II at 849.8 nm, -12.4; Ca II at 854.2 nm, -13.3; Ca II at 866.2 nm, -15.3; Fe II at 999.7 nm, -3.5; Pa-delta, -5.0. The Na D interstellar doublet is superimposed on a broad emission and has a heliocentric velocity of -11 km/s. The equivalent width for the D1 component was 0.058 nm. A broad Na D absorption system is seen at -408 km/s."
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- July 1992
- Bibcode:
- 1992IAUC.5553....2D