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Kinematics of the Ionized Gas in the Irregular Galaxies IC 10 and NGC 4449

Published online by Cambridge University Press:  25 May 2016

M. Rosado
Affiliation:
Instituto de astronomía, UNAM. Apartado Postal 70-264, CP04510, Mexico, D.F., Mexico
A. Bullejos
Affiliation:
Instituto de astronomía, UNAM. Apartado Postal 70-264, CP04510, Mexico, D.F., Mexico
M. Valdez
Affiliation:
Instituto de astronomía, UNAM. Apartado Postal 70-264, CP04510, Mexico, D.F., Mexico
L. Georgiev
Affiliation:
Instituto de astronomía, UNAM. Apartado Postal 70-264, CP04510, Mexico, D.F., Mexico
C. Lacey
Affiliation:
Instituto de astronomía, UNAM. Apartado Postal 70-264, CP04510, Mexico, D.F., Mexico
J. Borissova
Affiliation:
Institute of Astronomy, Bulgarian Academy of Sciences, 72 Tsaridradsko chaussee, BG1784 Sofia, Bulgaria
C. Esteban
Affiliation:
Instituto Astrofísico de Canarias, Tenerife, Canarias, España

Abstract

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We have searched for supernova remnants (SNRs) in the irregular galaxies IC 10 and NGC 4449 by means of Fabry-Perot interferometry in Hα and [SII] lines, complemented by radio continuum observations. We find several new SNR candidates in each galaxy in addition to the known ones. Although these galaxies have several common properties, the distributions of SNRs in each galaxy is different. This shows that the star formation mechanisms in these galaxies act in different ways, in favor of the formation of a large nebular HII complex in IC 10, similar to 30 Dor in the Large Magellanic Cloud. We are studying the conditions over which these different star formation histories take place.

Type
Part 2. Interstellar Medium
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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