2007/11/27 by Yanling Wu, V. Charmandaris, J. R. Houck +6 · 27 citations
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Dwarf galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Infrared #Physics #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/527288
published in The Astrophysical Journal 676(2), 970-977 (IOP Publishing) · 8 pages, 4 figures, accepted by ApJ
arxiv created 2007/11/27 · openalex publication_date 2008/04/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the correlation between the radio, mid-infrared, and far-infrared properties for a sample of 28 blue compact dwarf (BCD) and low-metallicity star-forming galaxies observed by Spitzer . We find that these sources extend the same far-infrared-to-radio correlation typical of star-forming late-type galaxies to lower luminosities. In BCDs, the 24 μm (or 22 μm) mid-infrared-to-radio correlation is similar to that of starburst galaxies, although there is somewhat larger dispersion in their q 24 parameter compared to their q FIR . No strong correlations between the q parameter and galaxy metallicity or effective dust temperature have been detected, although there is a hint of decreasing q 24 at low metallicities. The two lowest metallicity dwarfs in our sample, I Zw 18 and SBS 0335–052E, despite their similar chemical abundance, deviate from the average q 24 ratio in opposite manners, displaying an apparent radio excess and dust excess, respectively.