Results 71 to 80 of about 12,741,185 (402)
Physical Review D, 2018 Galaxy groups, which have hardly been looked at in MOND, afford probing the acceleration discrepancies in regions of system-parameter space that are not accessible in well-studied galactic systems, such as galaxies, galaxy clusters, and dwarf-spheroidal satellites of galaxies.
openaire +3 more sources
Scaling Properties of a Complete X-ray Selected Galaxy Group Sample [PDF]
, 2014 Upcoming X-ray surveys like eROSITA require precise calibration between X-ray observables and mass down to the low mass regime to set tight constraints on the fundamental cosmological parameters.
L. Lovisari +2 more
semanticscholar +1 more source
Galaxy Group Ellipticity Confirms a Younger Cosmos
UniverseWe present an analysis of the ellipticities of galaxy groups, derived from the spatial distribution of member galaxies, revealing a notable incongruity between the observed local galaxy groups and their counterparts in the Lambda cold dark matter ...
Yu Rong
doaj +1 more source
Disturbed Fossil Group Galaxy NGC 1132
, 2018 We have analyzed the Chandra archival data of NGC 1132, a well-known fossil group, i.e. a system expected to be old and relaxed long after the giant elliptical galaxy assembly. Instead, the Chandra data reveal that the hot gas morphology is disturbed and
Anderson, Craig +12 more
core +1 more source
Hot Atmospheres of Galaxies, Groups, and Clusters of Galaxies [PDF]
, 2020 Accepted for publication in the book "Reviews in Frontiers of Modern Astrophysics: From Space Debris to Cosmology" (eds Kabath, Jones and Skarka; publisher Springer Nature) funded by the European Union Erasmus+ Strategic Partnership grant "Per Aspera Ad Astra Simul" 2017-1-CZ01-KA203 ...
Norbert Werner +4 more
openaire +3 more sources
SEARCHING FOR DIFFUSE LIGHT IN THE M96 GALAXY GROUP [PDF]
, 2014 We present deep, wide-field imaging of the M96 galaxy group (also known as the Leo I Group). Down to surface brightness limits of μB = 30.1 and μV = 29.5, we find no diffuse, large-scale optical counterpart to the “Leo Ring,” an extended H i ring ...
A. Watkins +3 more
semanticscholar +1 more source
A Second Galaxy Missing Dark Matter in the NGC 1052 Group [PDF]
Astrophysical Journal, 2019 The ultra-diffuse galaxy NGC1052-DF2 has a very low velocity dispersion, indicating that it has little or no dark matter. Here we report the discovery of a second galaxy in this class, residing in the same group. NGC1052-DF4 closely resembles NGC1052-DF2
P. V. van Dokkum +4 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 We present spectroscopic chemical abundances of red giant branch stars in Andromeda (M31), using medium-resolution ( R ∼ 6000) spectra obtained via the Spectroscopic and Photometric Landscape of Andromeda’s Stellar Halo survey.
J. Leigh Wojno +8 more
doaj +1 more source
The Photography of Groups of Galaxies [PDF]
Symposium - International Astronomical Union, 1978 The method of combining several negatives together is at last coming into use. Forty years ago this method was used for the first time by Leontovsky in Leningrad. Putting together many negatives he was able to do photometry of M31 to fainter magnitudes than was possible photoelectrically.
openaire +2 more sources
The stripping of a galaxy group diving into the massive cluster A2142 [PDF]
, 2014 Structure formation in the current Universe operates through the accretion of group-scale systems onto massive clusters. The detection and study of such accreting systems is crucial to understand the build-up of the most massive virialized structures we ...
D. Eckert +12 more
semanticscholar +1 more source