Results 41 to 50 of about 125,059 (235)

THE THEORETICAL ASTROPHYSICAL OBSERVATORY: CLOUD-BASED MOCK GALAXY CATALOGS* [PDF]

open access: yesThe Astrophysical Journal Supplement Series, 2016
ABSTRACT We introduce the Theoretical Astrophysical Observatory (TAO), an online virtual laboratory that houses mock observations of galaxy survey data. Such mocks have become an integral part of the modern analysis pipeline. However, building them requires expert knowledge of galaxy modeling and simulation techniques, significant ...
Bernyk, Maksym   +9 more
openaire   +4 more sources

Debiasing with Diffusion: Probabilistic Reconstruction of Dark Matter Fields from Galaxies with CAMELS [PDF]

open access: yesAstrophysical Journal
Galaxies are biased tracers of the underlying cosmic web, which is dominated by dark matter (DM) components that cannot be directly observed. Galaxy formation simulations can be used to study the relationship between DM density fields and galaxy ...
Victoria Ono   +5 more
semanticscholar   +1 more source

Formation of globular cluster candidates in merging proto-galaxies at high redshift: a view from the FIRE cosmological simulations [PDF]

open access: yes, 2017
Using a state-of-the-art cosmological simulation of merging proto-galaxies at high redshift from the FIRE project, with explicit treatments of star formation and stellar feedback in the interstellar medium, we investigate the formation of star clusters ...
Ji-hoon Kim   +28 more
semanticscholar   +1 more source

The black hole mass of BL Lacs from stellar velocity dispersion of the host galaxy [PDF]

open access: yes, 2001
We present the first results from our on-going program to estimate black hole masses [M(BH)] of nearby BL Lac objects. The estimates are based on stellar velocity dispersion (sigma) of the BL Lac host galaxies from optical spectroscopy, and the recently ...
Falomo, Renato   +2 more
core   +3 more sources

The astrophysics of early galaxy formation [PDF]

open access: yes, 2008
39 pages, to appear in the proceedings of the XVIII Canary Islands Winter School of Astrophysics on "The Emission Line Universe", J. Cepa and F.
openaire   +2 more sources

Observed Properties of Dark Matter on Small Spatial Scales [PDF]

open access: yes, 2007
The nature of dark matter is one of the outstanding questions of astrophysics. The internal motions of member stars reveal that the lowest luminosity galaxies in the Local Group are the most dark-matter dominated.
Benson   +4 more
core   +1 more source

A Progress Report on the Caltech Faint Galaxy Redshift Survey [PDF]

open access: yes, 2000
I review recent progress on determining the spectral energy distributions and luminosity functions for galaxies in the large magnitude limited sample in the region of the HDF-North of the Caltech Faint Galaxy Redshift Survey.Comment: Invited contribution
Cohen, Judith
core   +2 more sources

Optical surface photometry of radio galaxies - II. Observations and data analysis [PDF]

open access: yes, 1999
Optical imaging observations for 50 radio galaxies are presented. For each object isophotal contours, photometric profiles, structural parameters (position angle, ellipticity, Fourier coefficients), and total magnitudes are given.
Falomo, R.   +3 more
core   +1 more source

Morphology of galaxies in the WINGS clusters [PDF]

open access: yes, 2011
We present the morphological catalogue of galaxies in nearby clusters of the WIde-field Nearby Galaxy-clusters Survey (WINGS). The catalogue contains a total number of 39 923 galaxies, for which we provide the automated estimates of the morphological ...
G. Fasano   +32 more
semanticscholar   +1 more source

Euclid: Early Release Observations -- Dwarf galaxies in the Perseus galaxy cluster [PDF]

open access: yesAstronomy & Astrophysics
We make use of the unprecedented depth, spatial resolution, and field of view of the Early Release Observations (EROs) of the Perseus galaxy cluster to detect and characterise the dwarf galaxy population in this massive system.
F. Marleau   +499 more
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy