The rocket-ultraviolet spectrum of the planetary nebula NGC 7027

Revisiting the Formation of HeH+ in the Planetary Nebula NGC 7027

The Astrophysical Journal ◽

10.3847/1538-4357/ab9a50 ◽

2020 ◽

Vol 898 (1) ◽

pp. 86

Author(s):

R. C. Forrey ◽

J. F. Babb ◽

E. D. S. Courtney ◽

R. T. McArdle ◽

P. C. Stancil

Keyword(s):

Planetary Nebula ◽

Ngc 7027

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Photoionization modeling of the Galactic planetary nebulae Abell 39 and NGC 7027

Proceedings of the International Astronomical Union ◽

10.1017/s1743921312011325 ◽

2011 ◽

Vol 7 (S283) ◽

pp. 340-341 ◽

Cited By ~ 1

Author(s):

Ashkbiz Danehkar ◽

David J. Frew ◽

Quentin A. Parker ◽

Orsola De Marco

Keyword(s):

Planetary Nebula ◽

Planetary Nebulae ◽

Ngc 7027

AbstractWe estimate distances to the spherical planetary nebula Abell 39 and the bipolar planetary nebula NGC 7027 by interpolating from a wide grid of photoionization models using the 3-D code, MOCASSIN. We find preliminary distances of 1.5 kpc and 0.9 kpc respectively, with uncertainties of about 30%.

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Discovery of Extended X-Ray Emission from the Planetary Nebula NGC 7027 by the [ITAL]Chandra X-Ray Observatory[/ITAL]

The Astrophysical Journal ◽

10.1086/319651 ◽

2001 ◽

Vol 550 (2) ◽

pp. L189-L192 ◽

Cited By ~ 70

Author(s):

Joel H. Kastner ◽

Saeqa D. Vrtilek ◽

Noam Soker

Keyword(s):

Planetary Nebula ◽

X Ray ◽

Ngc 7027

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The IUE Ultraviolet Spectrum of PC 11

Symposium - International Astronomical Union ◽

10.1017/s0074180900171876 ◽

1993 ◽

Vol 155 ◽

pp. 398-398 ◽

Cited By ~ 1

Author(s):

M. Parthasarathy ◽

S.R. Pottasch ◽

J. Clavel

Keyword(s):

Short Wavelength ◽

Planetary Nebula ◽

Significant Variation ◽

Central Star ◽

Ultraviolet Spectrum ◽

Emission Lines ◽

Symbiotic Star ◽

Iras Source ◽

Long Wavelength ◽

Cold Dust

PC 11 (HD 149427, PK 331-5 1) is classified as a young planetary nebula with strong OIII 4363Å and a Zanstra temperature of TZ = 27000K. It is also classified as (D′ — type) yellow symbiotic star with A — F type companion. It is an IRAS source with detached cold dust with far intrared (IRAS) colours similar to planetary nebulae. The IUE short wavelength (SWP) spectra show emission lines due to OIII] (1661/1666Å). NIII] (1746/1754Å) CIII] (1907/1909Å). The OIII] and NIII] emission lines show significant variation. Variation in the strength of CIII] is not very significant. The strength of OIII] has decreased and NIII] has increased. The long wavelength (LWP) spectrum shows stellar continuum (A-F) and absorption lines due Mg II 2800Å feature. It also show emission lines at 2772Å (?) 3133Å −3140Å (very strong) (OIII, [FeV], 3209Å (He II?) ([FEII]). The variation in the strength of emission line due OIII] and NIII] and the presence of stellar continuum (A-F) suggests that the central star of PC 11 is a binary.

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