CCD narrowband photometry of the Helix Nebula (NGC 7293)

Details CCD narrowband photometry of the Helix Nebula (NGC 7293) CCD narrowband photometry of the Helix Nebula (NGC 7293)

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.3804p&link_type=abstract

American Astronomical Society, 186th AAS Meeting, #38.04; Bulletin of the American Astronomical Society, Vol. 27, p.866

Astronomy and Astrophysics

Astronomy

Scientific paper

The large-scale morphology of the Helix Nebula is investigated using deep, narrow-band, CCD images obtained with the 30-cm, f/3.2, flat-field camera on Mt. Skinakas Observatory. A huge halo, covering an area of 36times 30arcmin around the main nebular body, is revealed at extremely low levels (3.7 \cdot 10(-17) ergs sec(-1) cm(-2) arcsec(-2) ) in the deep CCD images, obtained through narrow-band filters centered on the Hα +N[II], Hβ , [OIII] and [SII] lines. The complex morphology of this nebula evident at both low and high light levels, along with the relatively-high expansion velocities of the various shells reported in the literature, suggests that the Helix Nebula must have undergone several, relatively-recent, mass-loss episodes. Also presented is clear evidence for an ongoing interaction between the expanding gaseous shells and the surrounding Interstellar Medium.

Affiliated with

Also associated with

No associations

Rating

CCD narrowband photometry of the Helix Nebula (NGC 7293) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with CCD narrowband photometry of the Helix Nebula (NGC 7293), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CCD narrowband photometry of the Helix Nebula (NGC 7293) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1057705