| 词条 | EChO |
| 释义 |
| name = EChO | image = | image_caption = | image_alt = | image_size = | mission_type = Astronomy | operator = ESA | website = {{url|1=http://sci.esa.int/echo/|2=sci.esa.int/echo}} | mission_duration = 4–5 years[1][2] | launch_mass = {{convert|2100|kg|lb|abbr=on}}[2] | BOL_mass = | landing_mass = | dry_mass = | payload_mass = | dimensions = | power = | launch_date = 2024[1] | launch_rocket = Soyuz STA/Fregat[2] | launch_site = Kourou ELS[2] | launch_contractor = Arianespace | orbit_reference = Sun–Earth L2[2][2] | orbit_regime = Halo or Lissajous | orbit_epoch = planned | apsis = apsis | telescope_type = Cassegrain[2] | telescope_diameter = {{convert|1.4|m|ft|abbr=on}}[2] | telescope_focal_length= {{convert|2|m|ft|abbr=on}}[2] | telescope_area = {{convert|14|m2|sqft|abbr=on}}[2] | telescope_wavelength = from 0.55 µm (orange) to 11µm (long-infrared) (goal: 0.4 to 16 µm)[1][2] | instruments = }} The Exoplanet Characterisation Observatory (EChO) was a proposed space telescope[3] as part of the Cosmic Vision roadmap of the European Space Agency, and competed with four other missions for the M3 slot in the programme. On 19 February 2014 the PLATO mission was selected in place of the other candidates in the programme, including EChO.[4] EChO would be the first dedicated mission to investigate exoplanetary atmospheres, addressing the suitability of those planets for life and placing the Solar System in context. EChO is intended to provide high resolution, multi-wavelength spectroscopic observations. It would measure the atmospheric composition, temperature and albedo of a representative sample of known exoplanets, constrain models of their internal structure and improve our understanding of how planets form and evolve.[5] It will orbit around the L2 Lagrange point, 1.5 million km from Earth in the anti-sunward direction. SPEChOFollowing PLATO's M3 selection, a proposal to add EChO on the joint Japanese-European SPICA far-infrared telescope emerged.[6] The proposed EChO instrument on SPICA(SPEChO) is a spectrometer covering light wavelengths from 5 to 20 micrometres, and will observe exoplanet atmospheres utilizing transit spectroscopy.[6][7] As long with a potential to recover the original scientific goals from EChO, SPEChO will enable SPICA to conduct specialized exoplanetary science studies. SPEChO may also be useful for the science case of galaxies.[8] However SPEChO's capabilities overlap with the James Webb Space Telescope's MIRI (Mid-Infrared Instrument), therefore SPEChO's advantages over other instruments has become a focus of whether or not to include it on SPICA.[6][9] Other M3 mission candidates
References1. ^1 2 {{cite web|title=EChO mission summary|url=http://sci.esa.int/echo/49257-summary/|work=EChO website|publisher=ESA|accessdate=28 January 2014|date=16 December 2013}} 2. ^1 2 {{cite web|title=EChO spacecraft|url=http://sci.esa.int/echo/49260-spacecraft/|work=EChO website|publisher=ESA|accessdate=28 January 2014|date=30 June 2013}} 3. ^1 2 3 4 5 6 7 8 {{Cite journal | last1 = Tinetti | first1 = G. | last2 = Beaulieu | first2 = J. P. | last3 = Henning | first3 = T. | last4 = Meyer | first4 = M. | last5 = Micela | first5 = G. | last6 = Ribas | first6 = I. | last7 = Stam | first7 = D. | last8 = Swain | first8 = M. | last9 = Krause | first9 = O. | last10 = Ollivier | first10 = M. | last11 = Pace | first11 = E. | last12 = Swinyard | first12 = B. | last13 = Aylward | first13 = A. | last14 = Boekel | first14 = R. | last15 = Coradini | first15 = A. | last16 = Encrenaz | first16 = T. | last17 = Snellen | first17 = I. | last18 = Zapatero-Osorio | first18 = M. R. | last19 = Bouwman | first19 = J. | last20 = Cho | first20 = J. Y. K. | last21 = Coudé De Foresto | first21 = V. | last22 = Guillot | first22 = T. | last23 = Lopez-Morales | first23 = M. | last24 = Mueller-Wodarg | first24 = I. | last25 = Palle | first25 = E. | last26 = Selsis | first26 = F. | last27 = Sozzetti | first28 = P. A. R. | first29 = N. | last30 = Adriani | first30 = A. | last28 = Ade | last29 = Achilleos | first27 = A. | title = EChO - Exoplanet Characterisation Observatory | doi = 10.1007/s10686-012-9303-4 | bibcode = 2012ExA....34..311T| arxiv = 1112.2728| journal = Experimental Astronomy | volume = 34 | issue = 2 | pages = 311 | year = 2012 | pmid = | pmc = | display-authors = 29 | url = http://eprints.ucm.es/37773/1/davidmontes07preprint.pdf }} 4. ^{{cite web|title=ESA selects planet-hunting PLATO mission|url=http://sci.esa.int/plato/53707-esa-selects-planet-hunting-plato-mission/|publisher=ESA|accessdate=20 March 2014|date=19 February 2014}} 5. ^{{Cite journal | last1 = Tinetti | first1 = G. | last2 = Cho | first2 = J. Y. K. | last3 = Griffith | first3 = C. A. | last4 = Grasset | first4 = O. | last5 = Grenfell | first5 = L. | last6 = Guillot | first6 = T. | last7 = Koskinen | first7 = T. T. | last8 = Moses | first8 = J. I. | last9 = Pinfield | first9 = D. | last10 = Tennyson | first10 = J. | last11 = Tessenyi | first11 = M. | last12 = Wordsworth | first12 = R. | last13 = Aylward | first13 = A. | last14 = Van Boekel | first14 = R. | last15 = Coradini | first15 = A. | last16 = Encrenaz | first16 = T. | last17 = Snellen | first17 = I. | last18 = Zapatero-Osorio | first18 = M. R. | last19 = Bouwman | first19 = J. | last20 = Du Foresto | first20 = V. C. | last21 = Lopez-Morales | first21 = M. | last22 = Mueller-Wodarg | first22 = I. | last23 = Pallé | first23 = E. | last24 = Selsis | first24 = F. | last25 = Sozzetti | first25 = A. | last26 = Beaulieu | first26 = J. P. | last27 = Henning | first27 = T. | last29 = Micela | first29 = G. | last30 = Ribas | first30 = I. | last28 = Meyer | first28 = M. | doi = 10.1017/S1743921311020448 | bibcode = 2011IAUS..276..359T| title = The science of EChO| url = http://www.ucl.ac.uk/phys/amopp/people/jonathan_tennyson/papers/495a.pdf| journal = Proceedings of the International Astronomical Union | volume = 6 | pages = 359 | year = 2011 | pmid = | pmc = | display-authors = 29 }} 6. ^1 2 {{cite web |url=http://alma-intweb.mtk.nao.ac.jp/~udencon/symp/symp2014/symp2014-shibai.pdf#page=24 |title=SPICA計画の経緯・現状 |publisher=Japan Radio Astronomy Forum |format=PDF |date=28 January 2015 |access-date=2017-01-03 |language=Japanese}} 7. ^{{cite web |url=http://member.ipmu.jp/kiyoto.yabe/gev2015/proc/galaxy2015-kaneda.pdf |title=SPICAの現状 |publisher=Institute for the Physics and Mathematics of the Universe |format=PDF |date=5 June 2015 |access-date=2017-01-03 }} 8. ^{{cite web |url=http://gopira.jp/sym2014b/03_nagao.pdf#page=20 |title=SPICAサイエンス検討中間報告 |publisher=Group of Optical and Infrared Astronomers SPICA task force |format=PDF |date=26 November 2014 |access-date=2017-01-03 |language=Japanese}} 9. ^{{cite web |url=http://gopira.jp/sym2014b/05_takeuchi_honda.pdf |title=タスクフォースからの提言 近傍銀河および星惑星系形成分野 |publisher=Group of Optical and Infrared Astronomers SPICA task force |format=PDF |date=26 November 2014 |access-date=2017-01-03 |language=Japanese}} External links
4 : European Space Agency space probes|Space observatories|Exoplanet search projects|Cosmic Vision |
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