An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 2 Search : blueberry
blueberry
  آبی‌پلار   
âbipelâr

Fr.: myrtille, bleuet   

The edible, usually blueish berry of various shrubs belonging to the genus Vaccinium, of the heath family (TheFreeDictionary).

blue; → berry.

Blueberry galaxy
  کهکشان ِ آبی‌پلار   
kahkešân-e âbipelâr

Fr.: galaxie myrtille, ~ bleuet   

A galaxy having a very small size (< 1 kpc), very low stellar mass (typically 106.5 to 107.5  Msun), very low gas → metallicity (3 to 10% solar → metallicity, and very high → ionization. Blueberry galaxies, compared to star forming → dwarf galaxies, have similar stellar mass and luminosity, but much stronger → [O III] doublet (λλ4959+5007) line strength and gas ionization. Because Blueberry galaxies are selected by the strong [O III] → emission lines, they represent the star-forming → dwarf galaxies with the highest emission line strength and gas ionization. On the other hand, compared to → Green Pea galaxies at → redshifts z ~ 0.2-0.3 and typical high-zLyman alpha emitting galaxies (LAEs) found in the current narrow-band surveys, Blueberry galaxies have similarly strong emission lines but about 10-100 times smaller stellar mass, → star formation rate, and luminosity. So Blueberry galaxies represent the faint-end of → Green Pea galaxies and → Lyman alpha emitting galaxies (Yang et al, 2017, arxiv/1706.02819, and references therein).

blueberry; → galaxy.