Fayl:A Taste of ESPRESSO.jpg
Faylın orijinalı (5.616 × 3.744 piksel, fayl həcmi: 3,74 MB, MIME növü: image/jpeg)
Bu fayl "Vikimedia Commons"dadır və digər layihələrdə istifadə edilə bilər. |
Faylın təsvir səhifəsinə get |
Xülasə
İzahA Taste of ESPRESSO.jpg |
English: The huge diffraction grating at the heart of the ultra-precise ESPRESSO spectrograph — the next generation in exoplanet detection technology — is pictured undergoing testing in the cleanroom at ESO Headquarters in Garching bei München, Germany.
Engineers at ESO have recently completed the difficult process of aligning the grating. The production and alignment of this component is one of the key ESO contributions to the ESPRESSO project. The grating is the largest ever assembled at ESO, and its length matches the largest echelle grating ever made — the 1.2 x 0.3 metre grating for the HIRES spectrograph at the Keck 10-metre telescope. After its final alignment, the grating is fixed in a permanent mount. All its components are made of Zerodur (the same material that is used for the mirrors of the VLT) and will require no further adjustments, ever. This mounting technique was pioneered at ESO, and demonstrated to work on earlier instruments. When installed at ESO’s Paranal Observatory in Chile in 2016, ESPRESSO will combine the light from all four Unit Telescopes of the Very Large Telescope to create a virtual 16-metre aperture telescope. Its diffraction grating will split up the light into its component colours for analysis — spreading the light as a prism does, although relying on a different physical mechanism. The successor of HARPS — the world’s foremost exoplanet hunter — ESPRESSO will take the search for exoplanets to the next level, allowing astronomers to search for Earth-like planets around nearby stars in the habitable zone [1]. It will have many other science applications, including the search for possible variations in the constants of nature at different times in the life of the Universe, and in different directions, through the study of light from very distant quasars. Notes [1] A planet in orbit around a star introduces a small and regular variation in the velocity component as measured along the line of sight (known as the radial velocity) by a distant observer on Earth. This variation can be observed as a “wobble” in the spectrum of the star as the lines shift to and fro about their central position as a result of the Doppler effect. As the planet moves away from the observer, the radial velocity change induces a shift of the star’s spectrum towards longer wavelengths (a redshift) and shorter wavelengths as it moves closer (a blueshift). These tiny shifts in the position of the star’s spectrum on the detector are on the order of a few nanometers, but can nevertheless be measured with ESPRESSO and used to infer the presence of planets. |
Tarix | |
Mənbə | http://www.eso.org/public/images/potw1537a/ |
Müəllif | ESO/M. Zamani |
Lisenziya
This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
This file is licensed under the Creative Commons Attribution 4.0 International license.
|
Items portrayed in this file
təsvir edir
copyright status ingilis
copyrighted ingilis
14 sentyabr 2015
MIME type ingilis
image/jpeg
checksum ingilis
b83fba886889e1ce7a2c748a4d98bf8bfc9aac4f
data size ingilis
213.282 Bayt
853 piksel
1.280 piksel
Faylın tarixçəsi
Faylın əvvəlki versiyasını görmək üçün gün/tarix bölməsindəki tarixlərə klikləyin.
Tarix/Vaxt | Kiçik şəkil | Ölçülər | İstifadəçi | Şərh | |
---|---|---|---|---|---|
indiki | 10:58, 14 fevral 2024 | 5.616 × 3.744 (3,74 MB) | C messier | full size | |
09:26, 15 sentyabr 2015 | 1.280 × 853 (208 KB) | Jmencisom | User created page with UploadWizard |
Fayl keçidləri
Aşağıdakı səhifə bu faylı istifadə edir:
Faylın qlobal istifadəsi
Bu fayl aşağıdakı vikilərdə istifadə olunur:
- en.wikipedia.org layihəsində istifadəsi
- tr.wikipedia.org layihəsində istifadəsi
- vi.wikipedia.org layihəsində istifadəsi
Metaməlumatlar
Bu faylda fotoaparat və ya skanerlə əlavə olunmuş məlumatlar var. Əgər fayl sonradan redaktə olunubsa, bəzi parametrlər bu şəkildə göstərilənlərdən fərqli ola bilər.
Təmin edici | ESO/M. Zamani |
---|---|
Mənbə | European Southern Observatory |
Qısa başlıq |
|
Şəkil başlığı |
|
İstifadə qaydası |
|
Orijinal tarix və vaxt | 10:00, 14 sentyabr 2015 |
JPEG şəkil şərhi | The huge diffraction grating at the heart of the ultra-precise ESPRESSO spectrograph — the next generation in exoplanet detection technology — is pictured undergoing testing in the cleanroom at ESO Headquarters in Garching bei München, Germany. Engineers at ESO have recently completed the difficult process of aligning the grating. The production and alignment of this component is one of the key ESO contributions to the ESPRESSO project. The grating is the largest ever assembled at ESO, and its length matches the largest echelle grating ever made — the 1.2 x 0.3 metre grating for the HIRES spectrograph at the Keck 10-metre telescope. After its final alignment, the grating is fixed in a permanent mount. All its components are made of Zerodur (the same material that is used for the mirrors of the VLT) and will require no further adjustments, ever. This mounting technique was pioneered at ESO, and demonstrated to work on earlier instruments. When installed at ESO’s Paranal Observatory in Chile in 2016, ESPRESSO will combine the light from all four Unit Telescopes of the Very Large Telescope to create a virtual 16-metre aperture telescope. Its diffraction grating will split up the light into its component colours for analysis — spreading the light as a prism does, although relying on a different physical mechanism. The successor of HARPS — the world’s foremost exoplanet hunter — ESPRESSO will take the search for exoplanets to the next level, allowing astronomers to search for Earth-like planets around nearby stars in the habitable zone [1]. It will have many other science applications, including the search for possible variations in the constants of nature at different times in the life of the Universe, and in different directions, through the study of light from very distant quasars. Notes [1] A planet in orbit around a star introduces a small and regular variation in the velocity component as measured along the line of sight (known as the radial velocity) by a distant observer on Earth. This variation can be observed as a “wobble” in the spectrum of the star as the lines shift to and fro about their central position as a result of the Doppler effect. As the planet moves away from the observer, the radial velocity change induces a shift of the star’s spectrum towards longer wavelengths (a redshift) and shorter wavelengths as it moves closer (a blueshift). These tiny shifts in the position of the star’s spectrum on the detector are on the order of a few nanometers, but can nevertheless be measured with ESPRESSO and used to infer the presence of planets. More information ESPRESSO (Echelle SPectrograph for Rocky Exoplanet and Stable Spectroscopic Observations) is being developed by a consortium consisting of ESO and seven additional scientific institutes: Centro de Astrofísica da Universidade do Porto (Portugal) Faculdade de Ciências da Universidade de Lisboa, CAAUL & LOLS (Portugal) INAF–Osservatorio Astronomico di Trieste (Italy) INAF–Osservatorio Astronomico di Brera (Italy) Instituto de Astrofísica de Canarias (Spain) Physikalisches Institut der Universität Bern (Switzerland) Université de Genève (Switzerland). |
Açar sözlər | ESPRESSO |
Əlaqə məlumatı |
Karl-Schwarzschild-Strasse 2 Garching bei München, None, D-85748 Germany |
IIM versiya | 4 |