THE ULTRAVIOLET-SPECTRUM OF THE PLANETARY-NEBULA VY-2-2

Authors
Citation
Wa. Feibelman, THE ULTRAVIOLET-SPECTRUM OF THE PLANETARY-NEBULA VY-2-2, Publications of the Astronomical Society of the Pacific, 105(688), 1993, pp. 595-598
Citations number
20
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
105
Issue
688
Year of publication
1993
Pages
595 - 598
Database
ISI
SICI code
0004-6280(1993)105:688<595:TUOTPV>2.0.ZU;2-G
Abstract
New ultraviolet short-wavelength (SWP) IUE observations for the proto- planetary nebula Vy 2-2 were obtained in the low-dispersion mode. An e xposure of 400-min duration reveals a weak stellar continuum and sever al definite emission lines as well as a number of absorption features. Emission features of C III], Si III], and [Ne III] are clearly observ ed, while C IV, Si II, and possibly C II appear in absorption. Emissio n features of He II, O III], and Al III are also indicated, though les s certain. The UV spectrum tends to confirm that Vy 2-2 is a young, de nse planetary nebula excited by a central star with T(eff) > 60,000 K.