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NASA Participation in ESA-Led L3 Gravitational Wave Mission

NASA intends to partner with ESA on the third Large-Class mission (L3) in ESA's Cosmic Vision 2015-2025 Programme, planned for launch in 2034. ESA has selected a gravitational wave observatory as the science theme.

The LISA (Laser Interferometer Space Antenna) mission, led by ESA (European Space Agency) with NASA contributions, will detect gravitational waves in space using three spacecraft, separated by more than a million miles, flying in a triangular formation. Lasers fired between the satellites, shown in this artist’s concept, will measure how gravitational waves alter their relative distances.
AEI/MM/Exozet

Lynx X-ray Observatory

The Lynx mission concept seeks to provide unprecedented X-ray vision into the universe. Lynx will directly observe the dawn of supermassive black holes, reveal the drivers of galaxy formation, trace stellar activity (including effects on planet habitability), and transform our knowledge of endpoints of stellar evolution. Expanding on the legacy of the Chandra X-ray Observatory, Lynx’s design will include excellent angular resolution, high throughout, a large field-of-view, and high spectral resolution for both point-like and extended sources.

Lynx is a true next-generation X-ray observatory whose design will include excellent angular resolution, high throughput, large field of view, and high spectral resolution for both point-like and extended sources.
NASA

Probe-Class Astrophysics Mission Concepts

A Study to Assess Community Interest in Probes and Understand Range of Concepts.

Dark Matter Map in Galaxy Cluster Abell 1689
Dark Matter Map in Galaxy Cluster Abell 1689.
NASA, ESA, E. Jullo (Jet Propulsion Laboratory), P. Natarajan (Yale University), and J.-P. Kneib (Laboratoire d'Astrophysique de Marseille, CNRS, France)

NASA / ESA Athena Study

The NASA / ESA Advanced Telescope Athena was selected to address the Cosmic Vision theme of the "Hot and Energetic Universe."

NASA is working with ESA to define the possible NASA contribution to this ESA-led X-ray mission. One U.S. scientist, Randall Smith of the Harvard-Smithsonian Center for Astrophysics, has been selected for the SST. Robert Petre of GSFC and Michael Garcia of NASA/HQ are ex-officio members.

A satellite with two extended solar panel arrays orbits above Earth, with the planet's curved horizon, clouds, and atmosphere visible below against the blackness of space.
Athena Spacecraft
NASA

X-ray Astrophysics Probe Study

In August 2013, NASA's Physics of the Cosmos (PCOS) Program established a Science and Technology Definition Team (STDT) to study concepts for a potential reduced-scale strategic spectroscopy X-ray mission. The X-ray Astrophysics Probe (XAP) STDT was constituted to assist the Astrophysics Division, through its PCOS Program Office, in developing a reference mission concept.

The mission study was ended with the 2014 selection of the Athena mission in Europe, at which point NASA began efforts to partner with ESA on Athena.

Galactic Center Region in X-rays from Chandra
Galactic Center Region in X-rays from Chandra.
NASA, CXC, Q.D. Wang (University of Massachusetts, Amherst), and STScI

2012 Architecting Studies

NASA's Physics of the Cosmos (PhysCOS) Program initiated two studies to develop mission concepts that could meet some or all of the objectives outlined in the New Worlds, New Horizons decadal report for the areas of X-ray astronomy and gravitational-wave science. The PhysCOS Program worked with these communities to define mission concepts that achieve these science objectives at multiple price points.

This began with the release of a formal Request for Information (RFI) on each topic. In parallel, NASA released an open solicitation inviting members of the science community to participate in a Community Science Team (CST) for the X-ray mission or the gravitational-wave mission. The Program Office worked with each CST to review the RFI responses. In December 2012, workshops, which were open to the community, were held to discuss the RFI responses and define the mission concepts to be studied.

A PhysCOS Program study team, working with each CST, identified the requirements relevant to each concept, defined the mission configuration options, executed mission design runs at mission design laboratories, refined the mission concepts, and drafted a mission concept study reports.

Details relevant to each of these architecting studies can be found by following the links below:

Spiral galaxy with a blue tail
This composite view of ESO 137-001 includes visible light from Hubble and X-ray light from the Chandra X-ray Observatory (in blue). It reveals a tail of hot gas that has been stripped from the galaxy.
NASA, ESA, CXC

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