Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...169...14b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 169, no. 1-2, Nov. 1986, p. 14-42. Research supported by the Stichting Astrono
Astronomy and Astrophysics
Astronomy
185
Andromeda Galaxy, Astronomical Models, H Lines, Interstellar Gas, Galactic Structure, H Ii Regions, Radio Astronomy, Supernovae
Scientific paper
An analysis is carried out of H I holes in M 31 as detected with the Westerbork radiotelescope. The holes range from 100-1000 pc across and represent missing masses ranging from 1000-10 million solar masses, which would require energies ranging from 10 to the 49th to 10 to the 53rd erg. The kinematic ages are projected to be from 2.5-30 million years, with the production rate of the holes being 1/100,000 yr. The production rate estimate is used to derive a lower limit for the occurrence of supernovae in M 31, about 0.001/yr. Finally, a correlation is found between H I holes smaller than 300 pc and OB associations and H II regions.
Bajaja Esteban
Brinks Elias
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