Star formation in dwarf galaxies

Noah Brosch, Ana Heller, Elchanan Almoznino

Research output: Contribution to journalArticlepeer-review

Abstract

We explore mechanisms for the regulation of star formation in dwarf galaxies. We concentrate primarily on a sample in the Virgo Cluster, which has H I and blue total photometry, for which we collected Hα data at the Wise Observatory. We find that dwarf galaxies do not show the tight correlation of the surface brightness of Hα (a star formation indicator) with the H I surface density, or with the ratio of this density to a dynamical timescale, as found for large disk or starburst galaxies. On the other hand, we find the strongest correlation to be with the average blue surface brightness, indicating the presence of a mechanism regulating the star formation by the older (up to 1 Gyr) stellar population if present, or by the stellar population already formed in the present burst.

Original languageEnglish
Pages (from-to)720-724
Number of pages5
JournalAstrophysical Journal
Volume504
Issue number2 PART I
DOIs
StatePublished - 1998

Keywords

  • Galaxies: irregular
  • Galaxies: stellar content
  • H II regions
  • Stars: formation

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