HI shells in the outer Milky Way

Details HI shells in the outer Milky Way HI shells in the outer Milky Way

2005-03-21

arxiv.org/abs/astro-ph/0503443v1

Astronomy and Astrophysics

Astrophysics

accepted by A&A; 14 pages, 15 figures (3 multiple)

Scientific paper

10.1051/0004-6361:20034389

We present results of a method for an automatic search for HI shells in 3D data cubes and apply it to the Leiden-Dwingeloo HI survey of the northern Milky Way. In the 2nd Galactic quadrant, where identifications of structures are not substantially influenced by overlapping, we find nearly 300 structures. The Galactic distribution of shells has an exponential profile in the radial direction with a scale length of 3 kpc. In the z direction, one half of the shells are found at distances smaller than 500 pc. We also calculate the energies necessary to create the shells: there are several structures with energies greater than 10 E_SN but only one with an energy exceeding 100 E_SN. Their size distribution, corrected for distance effects, is approximated by a power-law with an index 2.1. Our identifications provide a lower limit to the filling factor of shells in the outer Milky Way: f_2D = 0.4 and f_3D = 0.05.

Affiliated with

Also associated with

No associations

Rating

HI shells in the outer 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 HI shells in the outer Milky Way, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HI shells in the outer Milky Way will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-160567