Diffuse X-ray emission from the planetary nebula NGC 7009

Details Diffuse X-ray emission from the planetary nebula NGC 7009 Diffuse X-ray emission from the planetary nebula NGC 7009

2002-03-04

arxiv.org/abs/astro-ph/0203049v1

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, to be published in Astronomy & Astrophysics, Letters

Scientific paper

10.1051/0004-6361:20020330

XMM-Newton EPIC observations of the planetary nebula (PN) NGC 7009, the Saturn Nebula, have detected extended X-ray emission in its central cavity. The diffuse X-ray emission must originate in the shocked fast stellar wind. The spectra show that the temperature of the hot gas is 1.8*10^6 K. The rms density derived from the volume emission measure is a few tens H-atom/cm^3. The hot gas does not appear over-pressurized with respect to the nebular shell. NGC 7009 represents an evolutionary stage at which the influence of the hot gas in the PN interior starts to decline due to the diminishing strength of the fast stellar wind and the expansion of the central cavity.

Affiliated with

Also associated with

No associations

Rating

Diffuse X-ray emission from the planetary nebula NGC 7009 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 Diffuse X-ray emission from the planetary nebula NGC 7009, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffuse X-ray emission from the planetary nebula NGC 7009 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-76168