view Abstract Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An Interpretation of the Complex Early Stages of Nova Geminorum 1912. McLaughlin, Dean B. Abstract Unlike most novae, this one did not develop strong principal absorption during disappearance of the premaximum spectrum. After light maximum, 14 March, the premaximum absorption (I) disappeared 18 March. Short-lived high-velocity absorption with conspicuous emission, called system N, lasted 15 to 19 March. Disappearance of I is attributed to engulfment when overtaken by K, which also masked the development of the principal absorption (11) in an inner cloud. When K cleared away 20 March, II was strong, with fully developed emission. Its absorption had been faintly visible and one of its emission maxima conspicuous on 16 March. The diffuse enhanced absorption (III) was faint 19 March, strong 22 March, and strongest at secondary maximum, 24 March. It faded rapidly 31 March to 2 April, but weak remnants lasted several days. 31 March is considered the date when III overtook II. Approximate velocities in km/sea, and dates when the main clouds eii~erged from the apparent photo- sphere were as follows. System Vein city Starting date 1 -400 10-11 N larch X -1100 15 II -800 16 III -1500 22 A distance of 1000 pa and visual absolute magnitude -7.2 at maximum are derived. The following table lists radii, in solar units, of the apparent photo- sphere (R*), calculated from excitation temperatures, and radii of the shells. Date R* R1 Rx Rji Riir March 10.7 0.2 0.2 14.7 145 200 15.7 52 250 50 16.7 21 300 210 50 17.7 25 350 340 150 19.7 21 600 350 22.7 38 650 50 24.7 64 850 390 31.7 15 1550 1580 Radius assumed. slightly larger than phutusphere. Publication: The Astronomical Journal Pub Date: 1965 DOI: 10.1086/109601 Bibcode: 1965AJ.....70R.326M full text sources ADS |