Search Publications
The Spectrum of the Planetary Nebula NGC 6884
Feibelman, Walter A.; Hyung, Siek; Aller, Lawrence H.
The bright, compact, moderately high-excitation planetary nebula, NGC 6884 (Perek-Kohoutek 82 +07°1) has a rich spectrum promising good diagnostics and offering a good target for the Hamilton Echelle Spectrograph at Lick Observatory. We combine International Ultraviolet Explorer (IUE), near-UV, visual, and IR data to obtain N(ion)/N(H+)…
Infrared Photometry of 487 Sources in the Inner Regions of NGC 5128 (Centaurus A)
Minniti, Dante; Alonso, M. Victoria
We study the sources present in the inner 3 kpc region of NGC 5128 (Cen A), most of which are star clusters of different ages. Photometry of archival Hubble Space Telescope WFPC images (F675W filter) is complemented with IR photometry (JHK' filters) obtained with the IRAC2B infrared array camera at the ESO/MPI 2.2 m telescope. From IR color maps w…
The IUE Spectrum of the ``O VI Sequence'' Planetary Nebula IC 2003
Feibelman, Walter A.
We present archival low- and high-dispersion, as well as new SWP high-dispersion, IUE data of the ``O VI sequence'' planetary nebula IC 2003 that has not been studied extensively in the UV. Contrary to earlier UV studies, IC 2003 shows a rich spectrum of stellar and nebular emission lines. Nearly 60 new emission line fluxes are presented for He II…
The Greatly Expanded IUE Spectrum of the Planetary Nebula NGC 2371-2 and Its Central Star
Feibelman, Walter A.
Early IUE low-dispersion SWP and LWR spectra have been reexamined by means of refined current data reduction routines. These spectra contain much more information than was reported in 1981. A high-dispersion SWP spectrum was obtained in 1994 from which more than 80 emission and absorption features were identified, and log Ne = 3.0 +/- 0…