Home - SXS - Simulating eXtreme Spacetimes

the Science

~ four main areas we study ~

Relativity

Einstein's Version of the Laws of Physics Read More

Relativity
Gravitational
Waves

Ripples in the Fabric of Space Time Read More

Gravitational Waves
Compact
Objects

The End Points of Stellar Evolution Read More

Compact Objects
Numerical
Relativity

Giving the Problem to a Computer Read More

Numerical Relativity

GW1509014: LIGO Detects Gravitational Waves

Details: Created on Tuesday, 09 February 2016 16:29

On 14 September 2015 at 4:50:45 AM Eastern standard time, LIGO detected its first gravitational waves. The waves descended on Earth from the southern hemisphere, passed through the Earth, and emerged at the Earth's surface first at the LIGO interferometer in Livingston, Louisiana, and then, 7 milliseconds later, at the LIGO interferometer in Hanford, Washington (shown below).

Tidal effects in neutron star-compact object binaries

Details: Created on Monday, 01 February 2016 18:40

To detect and characterize gravitational waves from neutron star binaries, LIGO needs good models of all possible signals. Numerical relativity can't practically be used for every case, but it is needed to test and calibrate the simpler models that LIGO can use. Inspiral waveforms from binaries with neutron stars differ from binary black hole waveforms by the presence of tidal forces. In a recent paper (http://arxiv.org/abs/1602.00599), Tanja Hinderer and collaborators use SXS black hole-neutron star simulations to validate a new model of these tidal forces. They find that tidal effects can be stronger than previously expected when they come close to resonance with a neutron star's preferred ways of ringing (its normal modes of oscillation).

Explore the Science of SXS

Come, you lost Atoms, to your Centre draw,
And be the Eternal Mirror that you saw:
Rays that have wander'd into Darkness wide,
Return and back into your Sun subside.

From Farid al-Din Attar's twelfth-century masterpiece
The Conference of the Birds

About SXS

The SXS project is a collaborative research effort involving multiple institutions. Our goal is the simulation of black holes and other extreme spacetimes to gain a better understanding of Relativity, and the physics of exotic objects in the distant cosmos.

The SXS project is supported by Canada Research Chairs, CFI, CIfAR, Compute Canada, Max Planck Society, NASA, NSERC, the NSF, Ontario MEDI, the Sherman Fairchild Foundation, and XSEDE.