Density probability distribution functions of diffuse gas in the Milky Way

Details Density probability distribution functions of diffuse gas in the Milky Way Density probability distribution functions of diffuse gas in the Milky Way

2008-06-26

arxiv.org/abs/0806.4316v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, accepted for publication in MNRAS Letters

Scientific paper

10.1111/j.1745-3933.2008.00526.x

In a search for the signature of turbulence in the diffuse interstellar medium in gas density distributions, we determined the probability distribution functions (PDFs) of the average volume densities of the diffuse gas. The densities were derived from dispersion measures and HI column densities towards pulsars and stars at known distances. The PDFs of the average densities of the diffuse ionized gas (DIG) and the diffuse atomic gas are close to lognormal, especially when lines of sight at |b|<5 degrees and |b|>=5 degrees are considered separately. The PDF of at high |b| is twice as wide as that at low |b|. The width of the PDF of the DIG is about 30 per cent smaller than that of the warm HI at the same latitudes. The results reported here provide strong support for the existence of a lognormal density PDF in the diffuse ISM, consistent with a turbulent origin of density structure in the diffuse gas.

Affiliated with

Also associated with

No associations

Rating

Density probability distribution functions of diffuse gas in the Milky Way 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 Density probability distribution functions of diffuse gas in the Milky Way, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Density probability distribution functions of diffuse gas in the Milky Way will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-246485