Hi shells, supershells, shell-like objects, and ''worms''

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Astrophys. J., Suppl. Ser.; (United States)

DOI:https://doi.org/10.1086/190970· OSTI ID:6400196

Heiles, C

We present photographic representations of the combination of two Hi surveys, so as to eliminate the survey boundaries at Vertical BarbVertical Bar = 10/sup 0/. We also present high-contrast photographs for particular velocities to exhibit weak Hi features. All of these photographs were used to prepare a new list of Hi shells, supershells, and shell-like objects. We discuss the structure of three shell-like objects that are associated with high-velocity gas, and with gas at all velocities that is associated with radio continuum loops I, II, and III. We use spatial filtering to find wiggly gas filaments: ''worms'': crawling away from the galactic plane in the inner Galaxy. The ''worms'' are probably parts of shells that are open at the top; such shells should be good sources of hot gas for the galactic halo.

• Research Organization: Astronomy Department, University of California, Berkeley
• OSTI ID: 6400196
• Journal Information: Astrophys. J., Suppl. Ser.; (United States), Journal Name: Astrophys. J., Suppl. Ser.; (United States) Vol. 55:4; ISSN APJSA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
FLUIDS
GALAXIES
GASES
H1 REGIONS
MILKY WAY
NEBULAE
PHOTOGRAPHIC FILMS
PHOTOGRAPHY
RADIATIONS
RADIOWAVE RADIATION
SHELLS
STELLAR WINDS
SUPERNOVA REMNANTS