field galaxy

(redirected from Field galaxies)

field galaxy

Any galaxy that is not a member of a cluster of galaxies. Field galaxies are rare: the ratio of field galaxies to cluster galaxies is extremely uncertain, estimates ranging from 1:6 to essentially zero.

field galaxy

[′fēld ‚gal·ik·sē]
(astronomy)
An isolated galaxy that does not belong to a cluster.
References in periodicals archive ?
But by developing better model spectra and comparing the results with the Keck spectra of Hubble Deep Field galaxies, astronomers significantly increased the precision.
This would explain why the object is smaller than typical field galaxies of that time.
The authors compare their results for cluster spirals to a small sample of field galaxies from Zaritsky et al.
"This is the first direct determination of the fraction of field galaxies in the local Universe that contain active supermassive black holes," said co-author Paul Green of the Harvard-Smithsonian Center for Astrophysics in Cambridge, MA.
The aim of the project is to study age and metallicity gradients and dust extinction in spiral galaxies in clusters and compare the results with what has been found for field galaxies. They did their first observing run in 2006 for this project.
Color information may also indicate whether many of the Deep Field galaxies are as compact as they appear or are merely the brightest parts of large, diffuse galaxies, Dickinson adds.
Two additional field galaxies share a medium-power view with M106.
Meanwhile, Michael Merrifield (University of Nottingham, England) says that analysis of Hubble Deep Field galaxies indicates that barred spirals were virtually absent until the universe was about half its present age.