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Published in

Wiley, Monthly Notice- Royal Astronomical Society -Letters-, 1(388), p. L10-L14

DOI: 10.1111/j.1745-3933.2008.00489.x

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Formation of blue compact dwarf galaxies from merging and interacting gas-rich dwarfs

Journal article published in 2008 by Kenji Bekki ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We present the results of numerical simulations which show the formation of blue compact dwarf (BCD) galaxies from merging between very gas-rich dwarfs with extended HI gas disks. We show that dwarf-dwarf merging can trigger central starbursts and form massive compact cores dominated by young stellar populations. We also show that the pre-existing old stellar components in merger precursor dwarfs can become diffuse low surface brightness components after merging. The compact cores dominated by younger stellar populations and embedded in more diffusely distributed older ones can be morphologically classified as BCDs. Since new stars can be formed from gas transferred from the outer part of the extended gas disks of merger precursors, new stars can be very metal-poor ([Fe/H]