Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...184..133s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 184, no. 1-2, Oct. 1987, p. 133-143.
Astronomy and Astrophysics
Astrophysics
79
Electron Transitions, Galactic Nuclei, Interstellar Matter, Ionized Gases, Molecular Clouds, Gas Dynamics, Molecular Gases
Scientific paper
The ionized arched filaments have been found to lie predominantly along the edges of negative velocity molecular clouds. This gas has a density of a few ×104cm-3, a temperature ⪆100K, and a mass ≡2 orders of magnitude higher than the ionized gas mass. Molecular material with similar velocities also appears to form the northern ionization boundary of Sgr A. If all of this molecular gas is part of one structure, then the arched filaments lie within ≡40 pc of the galactic center. The spatial distribution of the negative velocity gas suggests a tidally disrupted molecular cloud. Supporting this hypothesis is a rather high volume filling factor (⪆0.3) for the dense molecular gas. The cloud surfaces could be ionized by a few localized pockets of OB stars, or via collisional ionization by nonthermal particles trapped in the magnetic field. Further observations are required to distinguish between these possibilities.
Guesten Rolf
Serabyn Eugen
No associations
LandOfFree
A molecular counterpart to the galactic center arc 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 A molecular counterpart to the galactic center arc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A molecular counterpart to the galactic center arc will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1772485