Your pictures

Readers' images of snowfalls across the UK

news.bbc.co.uk

Peace chance?

How S Asian rivals could capitalise on Mumbai attacks

news.bbc.co.uk

Bank cuts UK rates to 57-year low

The Bank of England has cut interest rates by one percentage point from 3% to 2%, their lowest level since 1951.

news.bbc.co.uk

Banks move to match interest cut

Northern Ireland's 'big four' banks say they will be matching the latest cut in interest rates by the Bank of England.

news.bbc.co.uk

Cash glow

How much does one street light cost for one night?

news.bbc.co.uk

Kenya PM calls for Mugabe removal

Power-sharing in Zimbabwe is dead and Africa must unite to oust President Mugabe, says Kenya's prime minister.

news.bbc.co.uk

No decision over Shields pardon

The High Court reserves judgement in the case of jailed Liverpool fan Michael Shields, who has started a pardon bid.

news.bbc.co.uk

Rhys killing 'appalled country'

The murder of schoolboy Rhys Jones was a terrible killing which appalled the whole country, a judge tells a jury in his summing up.

news.bbc.co.uk

Send your video, pictures and story ideas

Have you got a good story? BBC News wants to hear from you.

news.bbc.co.uk

Interest rates

Which lenders are passing on the rate cuts to customers?

news.bbc.co.uk

Controversial Lapland theme park closes down

The organisers of a Lapland-style theme park in the New Forest criticised by visitors as "hell" and a "scam" close it down.

news.bbc.co.uk

Liverpool hit by Torres setback

Liverpool striker Fernando Torres faces a minimum of four weeks on the sidelines because of a hamstring injury.

news.bbc.co.uk

Lie detectors for benefit claims

Voice-recognition lie detectors are used by two Welsh councils in a bid to clamp down on people making false benefits claims.

news.bbc.co.uk

Menezes family's inquest protest

The family of Jean Charles de Menezes have walked out of the inquest into his death at the Oval Cricket Ground in London in protest.

news.bbc.co.uk

PM 'has confidence' in Speaker

Gordon Brown says he has a "great deal of confidence" in House of Commons Speaker Michael Martin.

news.bbc.co.uk

US Congresswoman hangs up on Obama

A US Congresswoman hangs up the phone on President-elect Barack Obama, thinking the call is a hoax.

news.bbc.co.uk

Child protection review announced

The Scottish Government announces a wide-ranging review of guidance on child protection practices.

news.bbc.co.uk

Nice smell...

But why else would anyone buy a new car these days?

news.bbc.co.uk

Carmakers 'affect entire US economy'

The chairman of the Senate committee deciding whether to rescue the Detroit Three carmakers says the health of the entire US economy is at stake.

news.bbc.co.uk

DNA database 'breached rights'

Keeping the DNA of two Britons with no convictions was a breach of their human rights, a European court rules.

news.bbc.co.uk

Putin rules out early Kremlin bid

Russian Prime Minister Vladimir Putin says he will wait until 2012 to decide whether to run again for the presidency.

news.bbc.co.uk

DNA dilemma

Will European ruling result in more unsolved crimes?

news.bbc.co.uk

Mother guilty over Shannon kidnap

Shannon Matthews's mother and co-accused Michael Donovan are convicted of kidnapping the nine-year-old in a plot to claim a £50,000 reward.

news.bbc.co.uk

Pietersen praises collective move

England captain Kevin Pietersen says he did not have to persuade any of his Test squad to return to India following the Mumbai terror attack.

news.bbc.co.uk

Keane resigns as Sunderland boss

Roy Keane stands down as Sunderland manager after 27 months in charge at the Stadium of Light.

news.bbc.co.uk

 World Catalog > Science > Astronomy > Software > Computational Astrophysics

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World Catalog > Science > Astronomy > Software > Computational Astrophysics

Computational Astrophysics:

Aarseth's N-body software

[open source - multiplatform] Direct N-body algorithms.

http://www.ast.cam.ac.uk/~sverre/

Graand

Free Classified Ads Portal

www.graand.com

The Art of Computational Science

An online `socratic book' pedagogically describing the building of a N-body simulation code for stellar systems. Software (in Ruby) is included.

http://www.artcompsci.org/

Barnes & Hut Treecode Algorithm

[open source - multiplatform] A guide to a tree code algorithm implementation, used for astronomical N-body simulations.

http://www.ifa.hawaii.edu/~barnes/software.html

CAPGADGET

[open source - multiplatform] Visualization package to capture and display Gadget N-body simulations.

http://www.geocities.com/capgadget/

Cloudy & Associates

Cloudy is an extensive, well-established, large-scale spectral synthesis code designed to simulate fully physical conditions within an astronomical plasma and then predict the emitted spectrum. The web page contains links to papers published with cloudy, the most recent version of the software itself, and a discussion board.

http://www.nublado.org/

CMBEASY -- CMB calculations with Graphical User Interface

CMBEASY is a C++ code with GUI for calculation of CMB power spectra and other density fluctuation evolution data for a given cosmology.

http://www.cmbeasy.org/

COSMOMC-- Monte Carlo evaluation of CMB parameters

COSMOMC calculates a fast Markov Chain Monte-Carlo exploration of cosmological parameter space for an input set of constraints.

http://cosmologist.info/cosmomc/

DUSTY -- Radiation transfer through dust

DUSTY calculates the emerging spectrum of radiation from some source viewed after processing by a dusty region. The original radiation is scattered, absorbed and reemitted by the dust, and the emerging processed spectrum often provides the only available information about the embedded object. DUSTY can handle both planar and centrally-heated spherical density distributions. The number of independent input model parameters is minimized by fully implementing the scaling properties of the radiative transfer problem, and the spatial temperature profile is found from radiative equilibrium at every point in the dusty region. DUSTY has built in optical properties for the most common types of astronomical dust and comes with a library for many other grains.

http://www.pa.uky.edu/~moshe/dusty/

Enzo

Enzo is an adaptive mesh refinement (AMR), grid-based hybrid code (hydro + N-Body) which is designed to do simulations of cosmological structure formation.

http://cosmos.ucsd.edu/enzo/

EZ Stellar Evolution

EZ (Evolve ZAMS) Stellar Evolution tracks the evolution of new (Zero-Age Main Sequence) stars throughout the bulk of their lives (until an event which EZ does not model occurs, such as a Helium Flash or core crystallization). The code is clean and well documented. Links include a web interface to the code.

http://www.kitp.ucsb.edu/~paxton/EZ-intro.html

FLASH -- AMR reacting hydrodynamics

The FLASH code is a reacting hydrodynamics code with adaptive mesh refinement for general astrophysical hydrodynamics problems.

http://flash.uchicago.edu/

Gadget-2

The Gadget-2 code is an SPH simulation code designed for cosmological simulations but can be used for a wide variety of astrophysical hydrodynamics simulations with self-gravity.

http://www.mpa-garching.mpg.de/gadget/

N-Body/Particle Simulation Methods

An extensive online tutorial with examples and code references.

http://www.amara.com/papers/nbody.html

NEMO

[open source - Unix] An extendible stellar dynamics toolbox; has various programs to create, integrate, analyze and visualize N-body and SPH-like systems. In addition there are various tools to operate on images, tables and orbits, including FITS files to export/import to/from other astronomical data reduction packages.

http://bima.astro.umd.edu/nemo/

ORSA - Orbit Reconstruction, Simulation and Analysis

ORSA is a C++ framework for the development of algorithms and programs oriented to the simulation and analysis of the orbital evolution of bodies in space.

http://orsa.sourceforge.net

PHOEBE (PHysics Of Eclipsing BinariEs)

PHOEBE is an infrastructure for the numerical modeling and analysis of eclipsing binary stars, using a variety of models.

http://www.fiz.uni-lj.si/phoebe

Stellar Astrophysics Software

[open source - Windows] Various programs for stellar astrophysics. Includes CHANDRA stellar structure software for collapsed objects including rotating white dwarfs and neutron stars, and STARCAL for nuclear astrophysics and the stellar structure of main sequence stars with supernova forecasting.

http://ray-green.tripod.com/thelostchord.html

A TIPSY file viewer with MPI capabilities

[Open source - Linux] "Hubble in a bottle!" is visualization software for N-body simulations, which can be run in parallel using MPI for visualizing very large simulation results. Simulation output must be in TIPSY format.

http://hubble.sourceforge.net

ZEUS-MP

ZEUS is a venerable astrophysical hydrodynamics and MHD code that has been used to investigate a wide variety of astrophysical problems. The latest version includes gas hydrodynamics, ideal MHD, implicit flux-limited radiation diffusion (FLD), self gravity, and multispecies advection.

http://lca.ucsd.edu/portal/software

Peace chance?

How S Asian rivals could capitalise on Mumbai attacks

news.bbc.co.uk

Carmakers 'affect entire US economy'

The chairman of the Senate committee deciding whether to rescue the Detroit Three carmakers says the health of the entire US economy is at stake.

news.bbc.co.uk

Liverpool hit by Torres setback

Liverpool striker Fernando Torres faces a minimum of four weeks on the sidelines because of a hamstring injury.

news.bbc.co.uk

Interest rates

Which lenders are passing on the rate cuts to customers?

news.bbc.co.uk

PM 'has confidence' in Speaker

Gordon Brown says he has a "great deal of confidence" in House of Commons Speaker Michael Martin.

news.bbc.co.uk

No decision over Shields pardon

The High Court reserves judgement in the case of jailed Liverpool fan Michael Shields, who has started a pardon bid.

news.bbc.co.uk

Kenya PM calls for Mugabe removal

Power-sharing in Zimbabwe is dead and Africa must unite to oust President Mugabe, says Kenya's prime minister.

news.bbc.co.uk

Pietersen praises collective move

England captain Kevin Pietersen says he did not have to persuade any of his Test squad to return to India following the Mumbai terror attack.

news.bbc.co.uk

DNA dilemma

Will European ruling result in more unsolved crimes?

news.bbc.co.uk

Your pictures

Readers' images of snowfalls across the UK

news.bbc.co.uk

Bank cuts UK rates to 57-year low

The Bank of England has cut interest rates by one percentage point from 3% to 2%, their lowest level since 1951.

news.bbc.co.uk

Mother guilty over Shannon kidnap

Shannon Matthews's mother and co-accused Michael Donovan are convicted of kidnapping the nine-year-old in a plot to claim a £50,000 reward.

news.bbc.co.uk

Controversial Lapland theme park closes down

The organisers of a Lapland-style theme park in the New Forest criticised by visitors as "hell" and a "scam" close it down.

news.bbc.co.uk

Keane resigns as Sunderland boss

Roy Keane stands down as Sunderland manager after 27 months in charge at the Stadium of Light.

news.bbc.co.uk

Nice smell...

But why else would anyone buy a new car these days?

news.bbc.co.uk

Lie detectors for benefit claims

Voice-recognition lie detectors are used by two Welsh councils in a bid to clamp down on people making false benefits claims.

news.bbc.co.uk

DNA database 'breached rights'

Keeping the DNA of two Britons with no convictions was a breach of their human rights, a European court rules.

news.bbc.co.uk

Putin rules out early Kremlin bid

Russian Prime Minister Vladimir Putin says he will wait until 2012 to decide whether to run again for the presidency.

news.bbc.co.uk

Rhys killing 'appalled country'

The murder of schoolboy Rhys Jones was a terrible killing which appalled the whole country, a judge tells a jury in his summing up.

news.bbc.co.uk

US Congresswoman hangs up on Obama

A US Congresswoman hangs up the phone on President-elect Barack Obama, thinking the call is a hoax.

news.bbc.co.uk

Banks move to match interest cut

Northern Ireland's 'big four' banks say they will be matching the latest cut in interest rates by the Bank of England.

news.bbc.co.uk

Menezes family's inquest protest

The family of Jean Charles de Menezes have walked out of the inquest into his death at the Oval Cricket Ground in London in protest.

news.bbc.co.uk

Cash glow

How much does one street light cost for one night?

news.bbc.co.uk

Send your video, pictures and story ideas

Have you got a good story? BBC News wants to hear from you.

news.bbc.co.uk

Child protection review announced

The Scottish Government announces a wide-ranging review of guidance on child protection practices.

news.bbc.co.uk