V605 Aquilae — The Most Extreme Hydrogen-Poor Object

  • Waltraut C. Seitter
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 131)


V605 Aquilae, whose novalike outburst was observed in 1919, is the central object of the old planetary nebula A58. It is the only ‘nova’ known with a hydrogen-deficient carbon-rich outburst spectrum and a remnant consisting of a WC-type star and a nebula which appears to be totally void of hydrogen. The star shows a red continuum of magnitude 22.3 and a prominent line of CIV 580.8 nm with a total width of 4400 km/sec. Other lines are extremely weak. The remnant nebula shows only forbidden lines of heavy elements. The strongest ones are due to the nebular transitions of [0 III], [NII], [0I]. IR [0II] is present, other ions are suspected. The nebula is an IRAS point source of temperature 170 K.


Heavy Element Total Width Central Object Planetary Nebula Dynamic Time Scale 
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Copyright information

© International Astronomical Union 1989

Authors and Affiliations

  • Waltraut C. Seitter
    • 1
  1. 1.Astronomisches Institut der Universität MünsterMünsterF.R.Germany

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