HST Observations of the Nuclei of EGB 6 (0950+139) and Abell 58 (V605 Aql)

This paper deals with the central stars of two large, low-surface-brightness planetary nebulae: V605 Aquilae, central star of Abell 58, and 0950+139, central star of EGB 6. Both of these nuclei are associated with compact emission-line nebulosities, which are unresolved from the ground. We obtained images with the Faint Object Camera (FOC) on the Hubble Space Telescope of both objects, in order to determine the nature of the compact nebulae.

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An imaging and spectroscopic survey of the Abell Planetary Nebulae

Symposium - International Astronomical Union ◽

10.1017/s0074180900131043 ◽

1997 ◽

Vol 180 ◽

pp. 287-287

Author(s):

N. A. Walton ◽

J. R. Walsh ◽

G. Dudziak

Keyword(s):

White Dwarf ◽

Surface Brightness ◽

Planetary Nebulae ◽

Central Star ◽

Large Size ◽

Low Surface Brightness ◽

Thermal Pulses ◽

Central Stars

The Abell catalogue of planetary nebulae (PN) are distinguished by their large size, low surface brightness and generally faint central stars. They are thought to be old PN approaching the White Dwarf cooling track. A number have evidence for late thermal pulses (H-poor ejecta near the central star, e.g. A78) and binary central stars.

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Hubble Space Telescope imaging of globular cluster candidates in low surface brightness dwarf galaxies

Astronomy and Astrophysics ◽

10.1051/0004-6361:20052921 ◽

2005 ◽

Vol 442 (1) ◽

pp. 85-95 ◽

Cited By ~ 40

Author(s):

M. E. Sharina ◽

T. H. Puzia ◽

D. I. Makarov

Keyword(s):

Globular Cluster ◽

Surface Brightness ◽

Dwarf Galaxies ◽

Hubble Space Telescope ◽

Space Telescope ◽

Low Surface Brightness

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Hubble Space Telescope Images of Four Magellanic Cloud Planetary Nebulae

Symposium - International Astronomical Union ◽

10.1017/s0074180900170755 ◽

1993 ◽

Vol 155 ◽

pp. 213-213

Author(s):

M. J. Barlow ◽

J. C. Blades ◽

S. Osmer ◽

Keyword(s):

Hubble Space Telescope ◽

Planetary Nebulae ◽

Circular Ring ◽

Uniform Structure ◽

Full Description ◽

Type I ◽

Space Telescope ◽

Ring Shape ◽

Faint Object ◽

Northern Edge

Using the Faint Object Camera on-board the Hubble Space Telescope, we have obtained images of four planetary nebulae in the Magellanic Clouds, namely N2 and N5 in the SMC and N66 and N201 in the LMC. Each nebula was imaged through narrow-band filters isolating [O III] λ5007 and Hβ, for a nominal exposure time of 1000 seconds in each filter. The f/96 optical chain of the FOC was used, yielding 512×512 0.022 arcsec square pixels. Considerable detail is evident on the raw images and after deconvolution using the Richardson-Lucy algorithm, structures as small as 0.06 arcsec are easily discernible. Figure 1 shows NS and EW intensity cross-cuts through the deconvolved [O III] λ5007 images of SMC N2 and SMC N5. SMC N2 is a slightly ellleptical ringlike nebula, with its greatest elongation in the EW direction. The peak-to-peak dimensions of the ring are 0.21×0.26 arcsec2. SMC N5 has a circular ring shape, with the [O III] λ5007 image showing a clearly defined, nearly uniform structure, apart from a bright patch at the northern edge. The peak-to-peak diameter of the ring is 0.26 arcsec and the ring itself is significantly narrower than that of SMC N2, with a width as small as 0.06 arcsec (FWHM) in some places. LMC N201 is very compact, with a FWHM of 0.21 arcsec in the Hβ image. The Type I PN LMC N66 is a multi-polar nebula, with the brightest part having an extent of about 2 arcsec. Its structure is extremely complex, with several bright knots and faint loops visible outside the two bright lobes. A full description of our results can be found in Blades et al., ApJ,398, L41–44.

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