Diffuse X-ray emission from the planetary nebula NGC 7009 - Guerrero, Gruendl, et al. - 2002 () Citation Context ...the object shows deviations from axisymmetry that are similar to those introduced by deviations from a homologous expansion. Furthermore, the presence of hot X-ray emitting ...
While meteoritic gases have significant isotopic differences due to the inclusion of various nucleosynthetic components that escaped homogenization in the solar nebula (see Chapter 1.14), a major primordial component, designated Q gases (see Wieler, 1994), appears to have been widely distributed in ...
Homework Statement A planetary nebula is larger when imaged in H\alpha than when observed in a Helium line, Why? Homework Equations The Attempt at a Solution I understand that a planetary Nebula gives an emission spectrum and that If the nebula looks larger in a H line there is... knowle...
We further predict that with better resolution, the specific intensity of the line should increase, as most of the emission is coming from a smaller spread in velocities than is currently resolved. The dust in the wind, in analogy to dust in HII regions, does not reach temperature equilibrium...
These results suggest that the detected X-ray emission is dominated by shock-heated gas in the bipolar nebula, although we cannot rule out the presence of a point-like component at the position of the central star. The implications for and correspondence with current models of shock-heated gas...
centimetrenebulaeplanetaryemissionwavepne Mon.Not.R.Astron.Soc.000,1–17(2006)Printed5February2008(MNLATEXstylefilev2.2)Acentimetre-waveexcessoverfree-freeemissioninplanetarynebulaeS.Casassus1 ,L.-˚A.Nyman2,3,C.Dickinson4,5,T.J.Pearson41DepartamentodeAstronom´ıa,UniversidaddeChile,Casilla...
Such quantities have also been estimated for the very young PN CRL 618, where the strong variability observed in its radio and millimetre emission has previously prevented constructing its SED. A morphological study of the Helix Nebula was also performed. Planck maps reveal, for the first time, ...
(Finoguenov & Jones 2001). Radio emission inside these bubbles indicate that they were inflated by jets launched by the central active galactic nuclei (AGNs). The bubbles and jets play a key role in the energy and mass cycle of the intra-cluster medium (ICM) in these objects (e.g....
This theory holds that the planets formed from a disk-shaped protoplanetary nebula by pairwise accretion of small solid bodies (Safranov, 1969). A variant of the standard model invokes the gravitational collapse of portions of this disk to form gas-giant planets directly. This chapter outlines ...
For example, the rock cores of the planets likely did not “settle” from an initially well-mixed planet, but instead the gaseous components likely collapsed onto a preexisting rocky nucleus that formed in the protosolar nebula. Since the EOS of all possible mixtures has not been studied, ...