Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337..720s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 337, Feb. 15, 1989, p. 720-729. Research supported by the California Instit
Astronomy and Astrophysics
Astrophysics
21
Astronomical Spectroscopy, Cataclysmic Variables, Novae, Stellar Envelopes, Faint Objects, H Alpha Line, Hubble Space Telescope, Image Processing, Light Curve, Photoionization, Planetary Nebulae
Scientific paper
New H-alpha narrow-based CCD imaging of the recurrent nova T Pyxidis and the detection of a very faint, extended H-alpha halo surrounding the already known shell are reported. A forbidden O III image containing an emitting shell with a morphology different from that of the H-alpha shell is presented, and measurements of the H-alpha shell expansion are reported which rule out the 1966 eruption date for the shell origin, assuming uniform expansion. It is proposed that the observed shell consists of slowly moving, solar abundance ejecta which are photoionized.
Cohen Judith Gamora
Moffat Anthony F. J.
Shara Michael M.
Williams Robert E.
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