1995/06/07 by R. Silvotti, Silvotti, R., C. Bartolini +4
Engineering · Physics and Astronomy · #Astronomy and Astrophysical Research #Space Technology and Applications #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9506046
6 pages, uuencoded file (figures included), accepted by Astronomy and Astrophysics, May 1995
arxiv created 1995/06/07 · arxiv updated 2009/12/01
A photoelectric monitoring program has been applied, during the last four years, to five central stars of planetary nebulae (PNNs) with strong O VI λ 3811--34 Å\hspace0.1mm emission. NGC 6905 and, marginally, NGC 2452, show intrinsic luminosity variations, while NGC 7026, IC 2003 and NGC 1501 have constant luminosity within a few mmag. Photometric data have been analyzed with the best available packages for power--spectra reductions. Both pulsators have periods and physical characteristics well encompassed by the theoretical pulsational models relative to these stars.