Warm and Hot Gas and the Evolution of Dwarf Galaxies

Details Warm and Hot Gas and the Evolution of Dwarf Galaxies Warm and Hot Gas and the Evolution of Dwarf Galaxies

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap%26ss.276..783b&link_type=abstract

Astrophysics and Space Science, v. 276, Issue 2/4, p. 783-790 (2001).

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

This paper discusses results of multi-wavelength studies of low-mass galaxies with outflows. As a case study the extreme low-metallicity dwarf galaxy I Zw 18 is presented. The results from HST imaging, long-slit echelle spectroscopy and X-ray imaging are discussed in the context of chemical enrichment of dwarf galaxies. If outflows work primarily as a temporary repository of metals and not as a loss of metals into the intergalactic medium, we show that galactic winds can explain the relatively low N/O scatter seen in nearby low-metallicity dwarf galaxies as well as the apparent increase of N/O scatter observed in damped Ly_α systems with metallicities near that of I Zw 18 and below.

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