HI shells in the Leiden/Argentina/Bonn HI survey

Abstract

We analyse the all-sky Leiden/Argentina/Bonn HI survey, where we identify shells belonging to the Milky Way. We used an identification method based on the search of continuous regions of a low brightness temperature that are compatible with given properties of HI shells. We found 333 shells in the whole Galaxy. The size distribution of shells in the outer Galaxy is fitted by a power law with the coefficient of 2.6 corresponding to the index 1.8 in the distribution of energy sources. Their surface density decreases exponentially with a scale length of 2.8 kpc. The surface density of shells with radii >= 100 pc in the solar neighbourhood is around 4 per kpc^2 and the 2D porosity is approximately 0.7.

19 pages (incl. 10 pages appendix), 12 figures. Accepted for publication in A&A

References in corpus (1)

• The Vertical Structure of the Outer Milky Way HI Disk

Cited by in corpus (27)

• Feedback by massive stars and the emergence of superbubbles II. X-ray properties
• The Milky Way Project: Leveraging Citizen Science and Machine Learning to Detect Interstellar Bubbles
• 26Al kinematics: superbubbles following the spiral arms? Constraints from the statistics of star clusters and HI supershells
• Quantifying the energetics of molecular superbubbles in PHANGS galaxies
• The Galactic dynamics revealed by the filamentary structure in atomic hydrogen emission
• A Catalog of Holes and Shells in the Interstellar Medium of the LITTLE THINGS Dwarf Galaxies
• Discovery of an Apparent High Latitude Galactic Supernova Remnant
• HI anisotropies associated with radio-polarimetric filaments. Steep power spectra associated with cold gas
• A new catalog of HI supershell candidates in the outer part of the Galaxy
• Kompaneets Model Fitting of the Orion-Eridanus Superbubble II: Thinking Outside of Barnard's Loop
• The multiphase and magnetized neutral hydrogen seen by LOFAR
• The structure and characteristic scales of the HI gas in galactic disks
• A Deep, High-Angular Resolution 3D Dust Map of the Southern Galactic Plane
• Kompaneets Model Fitting of the Orion-Eridanus Superbubble
• RJ-plots: An improved method to classify structures objectively
• The HI supershell GS 118+01-44 and its role in the interstellar medium
• Correlation of HI shells and CO clumps in the outer Milky Way
• A Herschel study of G214.5-1.8: a young, cold and quiescent giant molecular filament on the shell of a HI superbubble
• GS242-03+37: a lucky survivor in the galactic gravitational field
• The young star population of L1188
• Galactic HI supershells: Kinetic energies and possible origin
• Gould's Belt: Local Large Scale Structure in the Milky Way
• Testing spatial uniformity of the CR spectrum in the local ISM with gamma-ray observations
• Interstellar HI Shells Identified in the SETHI Survey
• Gould's Belt
• Supernova origin of galactic turbulence revealed by superbubbles
• Superbubbles as the source of dynamical friction: gas migration, stellar and dark matter contributions