Report on the structure of the ionized interstellar hydrogen in the M33 galaxy - Observations made with the Zelenchuk 6-m telescope

Details Report on the structure of the ionized interstellar hydrogen in the M33 galaxy - Observations made with the Zelenchuk 6-m telescope Report on the structure of the ionized interstellar hydrogen in the M33 galaxy - Observations made with the Zelenchuk 6-m telescope

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981crasb.292.1521c&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie II - Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Ter

Astronomy and Astrophysics

Astrophysics

6

Galactic Structure, Interstellar Gas, Ionized Gases, Spiral Galaxies, Emission Spectra, Galactic Nuclei, H Ii Regions, Hydrogen Ions, Stellar Winds, Telescopes

Scientific paper

Observations made by the 6-m telescope at Zelenchuk Special Astrophysical Observatory, the largest optical telescope in the world, of the structure of ionized interstellar hydrogen emission in M33 are presented. The galaxy was observed using an F/1 focal reducer at the F/4 primary focus, resulting in a resolution of 2 arcsec. It is found that the filamentary structure of the H II is a general phenomenon, the frequency of which tends to decrease from the spiral arms to the interarm regions and disappear beyond 4 kpc from the galactic nucleus. Bubble-shaped H II regions, which were previously observed to increase in mean diameter with distance from the nucleus, are found to be less spherical in shape the nearer they are to the nucleus. The formations are attributed to processes of rapid expansion represented by supernova explosions and stellar winds.

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