| Publication |
A Multi-Instrument Study of the Helix Nebula Knots with the Hubble Space Telescope, O'Dell, C. R.,Henney, W. J.,Ferland, G. J., The Astronomical Journal, 130, 2005-07-01 00:00:00, 2005AJ....130..172O||Cometary Knots in the Helix Nebula, O'dell, C. R.,Handron, Kerry D., The Astronomical Journal, 111, 1996-04-01 00:00:00, 1996AJ....111.1630O||Determination of the Physical Conditions of the Knots in the Helix Nebula from Optical and Infrared Observations, O'Dell, C. R.,Henney, W. J.,Ferland, G. J., The Astronomical Journal, 133, 2007-05-01 00:00:00, 2007AJ....133.2343O||On the Nature of Linear Structures in the Helix and Orion Nebulae, O'Dell, C. R., The Astronomical Journal, 119, 2000-05-01 00:00:00, 2000AJ....119.2311O||The nature of the cometary knots in the Helix planetary nebula (NGC7293), Meaburn, J.,Clayton, C. A.,Bryce, M., Monthly Notices of the Royal Astronomical Society, 294, 1998-02-01 00:00:00, 1998MNRAS.294..201M||The Structure of Cometary Knots in the Helix Nebula, Burkert, A.,O'dell, C. R., The Astrophysical Journal, 503, 1998-08-01 00:00:00, 1998ApJ...503..792B||The Surprising Emission Distribution within the Helix Nebula Cometary Knots, O'Dell, C. R.,Henney, W. J.,Burkert, A., The Astronomical Journal, 119, 2000-06-01 00:00:00, 2000AJ....119.2910O |
