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The Dark Energy Survey (DES) is an astronomical survey designed to constrain the properties of dark energy.It uses images taken in the near-ultraviolet, visible, and near-infrared to measure the expansion of the universe using Type Ia supernovae, baryon acoustic oscillations, the number of galaxy clusters, and weak gravitational lensing. [1]
The Southern Eridanus void is connected to the Eridanus void by a hole in the distribution of galaxies separating the two. A hole in the distribution of galaxies separating Sculptor and Southern Eridanus voids the size of (redshift) 1250 km/s appears to exist. [11] Fornax Void: Hercules Void: 15.5 h +30° cz=7000 km/s 3100 km/s
This is a list of known galaxies within 3.8 megaparsecs (12.4 million light-years) of the Solar System, in ascending order of heliocentric distance, or the distance to the Sun. This encompasses about 50 major Local Group galaxies, and some that are members of neighboring galaxy groups , the M81 Group and the Centaurus A/M83 Group , and some ...
One feature that has been found is that voids have been shown to contain a significantly higher fraction of starburst galaxies of young, hot stars when compared to samples of galaxies in walls. [42] Voids offer opportunities to study the strength of intergalactic magnetic fields.
Galaxy-galaxy lensing is a specific type of weak (and occasionally strong) gravitational lensing, in which the foreground object responsible for distorting the shapes of background galaxies is itself an individual field galaxy (as opposed to a galaxy cluster or the large-scale structure of the cosmos). Of the three typical mass regimes in weak ...
A field galaxy is a galaxy that does not belong to a larger galaxy group or cluster and hence is gravitationally alone. Roughly 80% of all galaxies located within 5 Mpc (16 Mly) of the Milky Way are in groups or clusters of galaxies. [1] Most low-surface-brightness galaxies are field galaxies. [2]
Hubble eXtreme Deep Field: 2012: 2.3′x3′ Hubble Ultra-Deep Field (UV/VIS/NIR) 2014: Hubble Frontier Fields MACS J0416.1-2403 [10] 2015: Hubble Frontier Fields Abell 2744 [11] 2015: Hubble Frontier Fields MACS J0717.5+3745: 2015: Hubble Frontier Fields MACS J1149.5+2223 [12] 2015: Hubble Frontier Fields Abell S1063 [13] 2016: Hubble Frontier ...
They may represent a local (and therefore more recent) version of the faint blue galaxies known to exist in deep field galaxy surveys. These types of irregular galaxies also have high amounts of dark matter. [11] Irregular galaxies are considered late-type along with spiral galaxies as opposed to early type elliptical galaxies. [12]