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Making mock simulated catalogs is an important component of astrophysical data analysis. Selection criteria for observed astronomical objects are often too complicated to be derived from first principles. However the existence of an…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-22 Amir Hajian , Marcelo Alvarez , J. Richard Bond

Thermal dust emission carries information on physical conditions and dust properties in many astronomical sources. Because observations represent a sum of emission along the line of sight, their interpretation often requires radiative…

Instrumentation and Methods for Astrophysics · Physics 2019-02-06 M. Juvela

This paper is the first in a set that analyses the covariance matrices of clustering statistics obtained from several approximate methods for gravitational structure formation. We focus here on the covariance matrices of anisotropic…

We test the precision with which weak lensing data can provide characteristic cluster mass profiles within Cold Dark Matter scenarios. Using a parallel treecode to simulate volumes as large as 500h-1 Mpc with good resolution, we generate…

Astrophysics · Physics 2009-10-28 Mary Crone , Fabio Governato , Joachim Stadel , Thomas Quinn

Direct imaging is an active research topic in astronomy for the detection and the characterization of young sub-stellar objects. The very high contrast between the host star and its companions makes the observations particularly…

Instrumentation and Methods for Astrophysics · Physics 2023-10-12 Olivier Flasseur , Théo Bodrito , Julien Mairal , Jean Ponce , Maud Langlois , Anne-Marie Lagrange

Most gas in giant molecular clouds is relatively low-density and forms star inefficiently, converting only a small fraction of its mass to stars per dynamical time. However, star formation models generally predict the existence of a…

Solar and Stellar Astrophysics · Physics 2019-08-28 Shivan Khullar , Mark R. Krumholz , Christoph Federrath , Andrew J. Cunningham

Mock catalogues are a crucial tool in the analysis of galaxy surveys data, both for the accurate computation of covariance matrices, and for the optimisation of analysis methodology and validation of data sets. In this paper, we present a…

Aims: An effort has been undertaken to simulate the expected Gaia Catalogue, including the effect of observational errors. A statistical analysis of this simulated Gaia data is performed in order to better understand what can be obtained…

Instrumentation and Methods for Astrophysics · Physics 2014-07-02 X. Luri , M. Palmer , F. Arenou , E. Masana , J. de Bruijne , E. Antiche , C. Babusiaux , R. Borrachero , P. Sartoretti , F. Julbe , Y. Isasi , O. Martinez , A. C. Robin , C. Reylé , C. Jordi , J. M. Carrasco

X-ray observations of galaxy clusters potentially provide powerful cosmological probes if systematics due to our incomplete knowledge of the intracluster medium (ICM) physics are understood and controlled. In this paper, we present mock…

Astrophysics · Physics 2008-11-26 Daisuke Nagai , Alexey Vikhlinin , Andrey V. Kravtsov

Many algorithms have been proposed to help clinicians evaluate cone density and spacing, as these may be related to the onset of retinal diseases. However, there has been no rigorous comparison of the performance of these algorithms. In…

Medical Physics · Physics 2015-03-13 Letizia Mariotti , Nicholas Devaney

The galaxy size-stellar mass and central surface density-stellar mass relationships are observational constraints on galaxy formation models. However, inferring the physical size of a galaxy from observed stellar emission is non-trivial due…

Simulations of radio emission from extensive air showers we have published so far were performed with a Monte Carlo code using analytical parametrisations to describe the spatial, temporal, energy and angular particle distributions in the…

Astrophysics · Physics 2009-11-11 T. Huege , R. Ulrich , R. Engel

In previous papers of the series we used a combination of optical and near-infrared colours to derive constraints on the relative age structure in globular cluster systems. Here, we present the details, strength and limitations of our…

Astrophysics · Physics 2009-11-10 Maren Hempel , Markus Kissler-Patig

The ACS Survey of Globular Clusters has used HST's Wide-Field Channel to obtain uniform imaging of 65 of the nearest globular clusters to provide an extensive homogeneous dataset for a broad range of scientific investigations. The survey…

We present results obtained from a set of cosmological hydrodynamic simulations of galaxy clusters, aimed at comparing predictions with observational data on the diversity between cool-core (CC) and non-cool-core (NCC) clusters. Our…

Cosmology and Nongalactic Astrophysics · Physics 2015-11-04 E. Rasia , S. Borgani , G. Murante , S. Planelles , A. M. Beck , V. Biffi , C. Ragone-Figueroa , G. L. Granato , L. K. Steinborn , K. Dolag

Aims: The interactive software package iCosmo, designed to perform cosmological calculations is described. Methods: iCosmo is a software package to perform interactive cosmological calculations for the low redshift universe. Computing…

Astrophysics · Physics 2015-05-13 Alexandre Refregier , Adam Amara , Thomas Kitching , Anais Rassat

We present mock catalogs created to support the interpretation of the CANDELS survey. We extract halos along past lightcones from the Bolshoi Planck dissipationless N-body simulations and populate these halos with galaxies using two…

This work presents an approach (fitCMD) designed to obtain a comprehensive set of astrophysical parameters from colour-magnitude diagrams (CMDs) of star clusters. Based on initial mass function (IMF) properties taken from isochrones, fitCMD…

Instrumentation and Methods for Astrophysics · Physics 2018-12-12 Charles Bonatto

We present a new implementation of the Monte Carlo method to simulate the evolution of star clusters. The major improvement with respect to the previously developed codes is the treatment of the external tidal field taking into account for…

Solar and Stellar Astrophysics · Physics 2015-06-22 A. Sollima , A. Mastrobuono Battisti

Humans interpret complex visual stimuli using abstract concepts that facilitate decision-making tasks such as food selection and risk avoidance. Similarity judgment tasks are effective for exploring these concepts. However, methods for…

Neurons and Cognition · Quantitative Biology 2024-07-23 Chen Wei , Jiachen Zou , Dietmar Heinke , Quanying Liu
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