Results 21 to 30 of about 50 (50)

Observations of Lenticular Galaxies at the 6-m Telescope of the Special Astrophysical Observatory [PDF]

open access: yesGROUND-BASED ASTRONOMY IN RUSSIA. 21ST CENTURY. Proceedings of the All-Russian Conference, 2020
This is a historical review covering the last 30 years of the observational study of lenticular galaxies at the 6m telescope BTA of the Special Astrophysical Observatory of the Russian Academy of Sciences. The development of spectroscopic techniques at the BTA has allowed to get comprehensive information about this class of stellar systems, starting ...
openaire   +4 more sources

Astrophysical tests of modified gravity: the morphology and kinematics of dwarf galaxies [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2013
This paper is the third in a series on tests of gravity using observations of stars and nearby dwarf galaxies. We carry out four distinct tests using published data on the kinematics and morphology of dwarf galaxies, motivated by the theoretical work of Hui et al. (2009) and Jain and Vanderplas (2011). In a wide class of gravity theories a scalar field
Jake Vanderplas   +3 more
openaire   +3 more sources

Galaxy clusters as astrophysical laboratories and probes of cosmology [PDF]

open access: yes, 2014
Galaxy clusters are the most recent of cosmological structures to have formed by the present time in the currently favoured hierarchical scenario of structure formation and are widely regarded as powerful probes of cosmology and galaxy formation physics alike.
openaire   +2 more sources

Astrophysically motivated bulge-disc decompositions of Sloan Digital Sky Survey galaxies [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2012
28 pages, 34 figures, MNRAS ...
J. E. Gunn, C. N. Lackner
openaire   +4 more sources

Cross-correlation of the astrophysical gravitational-wave background with galaxy clustering

open access: yesPhysical Review D, 2020
We investigate the correlation between the distribution of galaxies and the predicted gravitational-wave background of astrophysical origin. We show that the large angular scale anisotropies of this background are dominated by nearby non-linear structure, which depends on the notoriously hard to model galaxy power spectrum at small scales. In contrast,
Valeri Vardanyan   +3 more
openaire   +5 more sources

Physical modelling of galaxy clusters and Bayesian inference in astrophysics

open access: yesarXiv: Cosmology and Nongalactic Astrophysics, 2019
I compare the mass values obtained with data taken from the Arcminute Microkelvin Imager (AMI) radio interferometer system and from the Planck satellite. The former of these uses a Bayesian analysis pipeline that parameterises a cluster in terms of its physical quantities, and models the dark matter \& baryonic components of a cluster using Navarro-
openaire   +3 more sources

Astrophysics and cosmology with galaxy clusters: the WFXT perspective

open access: yes, 2010
12 pages, 6 figures, Proceedings of "The Wide Field X-ray Telescope Workshop", held in Bologna, Italy, Nov. 25-26 2009. To appear in Memorie della Societ\`a Astronomica Italiana 2010 (arXiv:1010.5889)
Borgani, S.   +4 more
openaire   +2 more sources

Galclaim: A tool to identify host galaxy of astrophysical transient sources

open access: yesSoftwareX, 2023
The Galclaim software is designed to identify association between astrophysical transient sources and host galaxy by computing the probability of chance alignment. It is distributed as an open source Python software. It is already used to identify, confirm or reject host galaxy candidates of GRBs and to validate or invalidate transient candidates in ...
openaire   +3 more sources

Galaxy-Dark Matter Connection : from Astrophysics to Cosmology

open access: yes, 2009
Galaxy-galaxy (g-g) lensing represents an ideal technique to constrain the dark matter distribution on galaxy scales. The required accuracy in the signal can be achieved only by stacking many foreground galaxies and averaging the ellipticity of the resulting background galaxies.
Houjun Mo   +5 more
openaire   +3 more sources

Home - About - Disclaimer - Privacy