Exoplanetary Circumstellar Environments and Disk Explorer
Planned space telescope
| Mission type | Space observatory |
|---|---|
| Website | soweb |
| Mission duration | 3 years nominal (proposed)[1] |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Sun Synchronous |
| Semi-major axis | 2,000 km |
| Inclination | 105° |
| Period | 127 min |
| Main | |
| Diameter | 70 cm (28 in)[1] |
| Instruments | |
| Imaging polarimeter | |
Explorers program[1] | |
Exoplanetary Circumstellar Environments and Disk Explorer (EXCEDE) is a proposed space telescope for NASA's Explorer program to observe circumstellar protoplanetary and debris discs and study planet formation around nearby (within 100 parsecs) stars of spectral classes M to B.[1] Had it been selected for development, it was proposed to launch in 2019.
The spacecraft concept proposed to use a 70 centimeter diameter telescope-mounted coronagraph called PIAA (Phase Induced Amplitude Apodized Coronagraph) to suppress starlight in order to be able to detect fainter radiation of circumstellar dust.[1] Characterizing constitution of such disks would provide clues for planetary formation (mostly in habitable zones), while already existing exoplanets can be detected through their interaction with dust disk. The project's Principal Investigator is Glenn Schneider.[1]
Science goals
The science goals of the concept mission are: [1]
- Explore the amount of dust in habitable zones
- Determining if such a disk interferes with future planet finding missions (dust-scattered starlight causes noise in images of exoplanets[2])
- Determine composition of material delivered to planets: icy and organich-rich particles are important for life.[3]
- Determine fraction of massive planets on large orbits
- Observe how protoplanetary disks make Solar System-like architectures
- Constrain giant planets' composition by measuring their reflectivity[4] EXCEDE would be the first to image (giant) exoplanets distances from their stars similar to ours (0.5-7 AU).[5]
References
- ^ a b c d e f g The EXoplanetary Circumstellar Environments and Disk Explorer (EXCEDE). (PDF). Olivier Guyon, Glenn Schneider, Ruslan Belikov, Domenick J. Tenerelli. arXive repository. 10 October 2012. doi:10.1117/12.927188
- ^ "Future Mission Impacts?". Glenn Schneider. Archived from the original on 27 August 2016. Retrieved 25 February 2012.
- ^ "Delivery of Planet Veneers". Glenn Schneider. Archived from the original on 16 March 2016. Retrieved 25 February 2012.
- ^ "CS Disks: Signposts of Planets". Glenn Schneider. Archived from the original on 27 August 2016. Retrieved 24 February 2012.
- ^ "Cool Giant Exoplanets". Glenn Schneider. Archived from the original on 15 March 2016. Retrieved 25 February 2012.
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Exoplanets
and
types
and
evolution
- Accretion
- Accretion disk
- Asteroid belt
- Circumplanetary disk
- Circumstellar disc
- Circumstellar envelope
- Cosmic dust
- Debris disk
- Detached object
- Disrupted planet
- Excretion disk
- Exozodiacal dust
- Extraterrestrial materials
- Extraterrestrial sample curation
- Giant-impact hypothesis
- Gravitational collapse
- Hills cloud
- Internal structure
- Interplanetary dust cloud
- Interplanetary medium
- Interplanetary space
- Interstellar cloud
- Interstellar dust
- Interstellar medium
- Interstellar space
- Kuiper belt
- List of interstellar and circumstellar molecules
- Merging stars
- Molecular cloud
- Nebular hypothesis
- Oort cloud
- Outer space
- Planetary migration
- Planetary system
- Planetesimal
- Planet formation
- Protoplanetary disk
- Ring system
- Rubble pile
- Sample-return mission
- Scattered disc
- Star formation
- Astrobiology
- Astrooceanography
- Circumstellar habitable zone
- Earth analog
- Extraterrestrial liquid water
- Galactic habitable zone
- Habitability of binary star systems
- Habitability of F-type main-sequence star systems
- Habitability of K-type main-sequence star systems
- Habitability of natural satellites
- Habitability of neutron star systems
- Habitability of red dwarf systems
- Habitability of yellow dwarf systems
- Habitable zone for complex life
- List of potentially habitable exoplanets
- Tholin
- Superhabitable planet
- Exoplanetary systems
- Exoplanets
- Discoveries
- Extremes
- Firsts
- Nearest
- Largest
- Heaviest
- Terrestrial candidates
- Kepler
- 1–500
- 501–1000
- 1001–1500
- 1501–2000
- K2
- Potentially habitable
- Proper names
- Carl Sagan Institute
- Exoplanet naming convention
- Exoplanet phase curves
- Exoplanetary Circumstellar Environments and Disk Explorer
- Extragalactic planet
- Extrasolar planets in fiction
- Geodynamics of terrestrial exoplanets
- Neptunian desert
- Nexus for Exoplanet System Science
- Planets in globular clusters
- Small planet radius gap
- Sudarsky's gas giant classification
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