{"id":8604,"date":"2023-01-19T13:50:18","date_gmt":"2023-01-19T12:50:18","guid":{"rendered":"https:\/\/www.sedi-ati.com\/?p=8604"},"modified":"2024-07-10T15:30:01","modified_gmt":"2024-07-10T13:30:01","slug":"weave-premiere-lumiere-detectee-par-le-spectrographe-nouvelle-generation","status":"publish","type":"post","link":"https:\/\/www.sedi-ati.com\/fr\/weave-premiere-lumiere-detectee-par-le-spectrographe-nouvelle-generation\/","title":{"rendered":"WEAVE : Premi\u00e8re lumi\u00e8re d\u00e9tect\u00e9e par le spectrographe nouvelle g\u00e9n\u00e9ration"},"content":{"rendered":"

[vc_row content_placement=\u00a0\u00bbmiddle\u00a0\u00bb el_class=\u00a0\u00bbz-index-1 chevauchement-horizontal-range range-applications\u00a0\u00bb][vc_column width=\u00a0\u00bb3\/5″ css=\u00a0\u00bb.vc_custom_1685373321199{background-color: #4c4d4f !important;}\u00a0\u00bb el_class=\u00a0\u00bbshadow border-radius-hd-bd line-bottom line-blue txt-blanc block-grand-text\u00a0\u00bb][vc_raw_html el_class=\u00a0\u00bbgros-titre flex-column-mobile\u00a0\u00bb]JTNDcCUzRVNwZWN0cm9ncmFwaGUlM0NzcGFuJTIwY2xhc3MlM0QlMjJwb2ludC1yb3VnZSUyMiUzRSUzQyUyRnNwYW4lM0Vub3V2ZWxsZSUzQyUyRnAlM0UlMjAlMEElM0NwJTNFZyVDMyVBOW4lQzMlQTlyYXRpb24lM0MlMkZwJTNF[\/vc_raw_html][vc_column_text el_class=\u00a0\u00bbtxt-blanc\u00a0\u00bb]WEAVE (WHT Enhanced Area Velocity Explorer), est un spectrographe multifibres du t\u00e9lescope William Herschel de l\u2019Observatoire du Roque de los Muchachos, situ\u00e9 dans les \u00eeles Canaries.<\/p>\n

En d\u00e9cembre 2022, il a collect\u00e9 sa premi\u00e8re lumi\u00e8re provenant du Quintette de St\u00e9phan, un groupe de 5 galaxies, situ\u00e9 \u00e0 280 millions d\u2019ann\u00e9es-lumi\u00e8re de la plan\u00e8te Terre, dans la constellation P\u00e9gase.[\/vc_column_text][vc_btn title=\u00a0\u00bbContactez-nous\u00a0\u00bb style=\u00a0\u00bbcustom\u00a0\u00bb custom_background=\u00a0\u00bb#132f40″ custom_text=\u00a0\u00bb#ffffff\u00a0\u00bb shape=\u00a0\u00bbsquare\u00a0\u00bb link=\u00a0\u00bburl:https%3A%2F%2Fwww.sedi-ati.com%2Fcontact%2F|title:Contact\u00a0\u00bb el_class=\u00a0\u00bbline-bottom line-blue\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/2″ el_class=\u00a0\u00bbimg-entete\u00a0\u00bb][vc_single_image image=\u00a0\u00bb11206″ img_size=\u00a0\u00bbfull\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb][\/vc_column][\/vc_row][vc_row full_width=\u00a0\u00bbstretch_row_content\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1686120886696{background-color: #dfe2e8 !important;}\u00a0\u00bb el_class=\u00a0\u00bbfull-with-4000″][vc_column width=\u00a0\u00bb1\/2″][vc_row_inner][vc_column_inner el_class=\u00a0\u00bbwith-0-1240″ width=\u00a0\u00bb1\/3″][\/vc_column_inner][vc_column_inner width=\u00a0\u00bb2\/3″][vc_column_text el_class=\u00a0\u00bbpetit-titre petit-titre-txt petit-titre-txt-p\u00a0\u00bb]<\/p>\n

Observation de deux galaxies entrant en collision<\/strong><\/h2>\n

[\/vc_column_text][vc_column_text]Gr\u00e2ce \u00e0 ses trois syst\u00e8mes fibr\u00e9s (MOS, mIFUS et LIFU), le spectrographe est capable de scruter simultan\u00e9ment pr\u00e8s de 1\u00a0000 \u00e9toiles ou galaxies. Les 547 fibres optiques du LIFU, plac\u00e9es en hexagone, ont permis d\u2019observer le mouvement des galaxies NGC 7318a et NGC 7318b, se d\u00e9pla\u00e7ant \u00e0 une vitesse de 800 kilom\u00e8tres par seconde et rentrant en collision.[\/vc_column_text][vc_column_text]Gavin Dalton, chercheur principal de WEAVE, a d\u00e9clar\u00e9 : \u00ab La richesse de la complexit\u00e9 r\u00e9v\u00e9l\u00e9e de cette mani\u00e8re par une seule observation d\u00e9taill\u00e9e de cette paire de galaxies proches donne un aper\u00e7u de l\u2019interpr\u00e9tation des millions de spectres que WEAVE obtiendra des galaxies de l\u2019Univers lointain, et fournit une excellente illustration de la puissance et de la flexibilit\u00e9 de l\u2019installation WEAVE. \u00bb[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][vc_column width=\u00a0\u00bb1\/2″ css=\u00a0\u00bb.vc_custom_1686035600704{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}\u00a0\u00bb][vc_row_inner css=\u00a0\u00bb.vc_custom_1686035608506{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}\u00a0\u00bb][vc_column_inner width=\u00a0\u00bb1\/6″][\/vc_column_inner][vc_column_inner el_class=\u00a0\u00bbshadow border-radius-hd-bd line-bottom line-blue\u00a0\u00bb width=\u00a0\u00bb2\/3″ css=\u00a0\u00bb.vc_custom_1686035612459{background-color: #ffffff !important;}\u00a0\u00bb offset=\u00a0\u00bbvc_col-xs-9″][vc_column_text el_class=\u00a0\u00bbbaseline\u00a0\u00bb]<\/p>\n

N\u2019h\u00e9sitez pas \u00e0 vous rapprocher de nous et \u00e0 nous faire part de votre demande sp\u00e9cifique<\/p>\n

[\/vc_column_text][vc_btn title=\u00a0\u00bbContactez-nous\u00a0\u00bb style=\u00a0\u00bbcustom\u00a0\u00bb custom_background=\u00a0\u00bb#132f40″ custom_text=\u00a0\u00bb#ffffff\u00a0\u00bb shape=\u00a0\u00bbsquare\u00a0\u00bb align=\u00a0\u00bbcenter\u00a0\u00bb link=\u00a0\u00bburl:https%3A%2F%2Fwww.sedi-ati.com%2Ffr%2Fcontact%2F\u00a0\u00bb el_class=\u00a0\u00bbline-bottom line-blue\u00a0\u00bb][\/vc_column_inner][vc_column_inner width=\u00a0\u00bb1\/6″][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/2″][vc_column_text el_class=\u00a0\u00bbpetit-titre petit-titre-txt petit-titre-txt-p\u00a0\u00bb]<\/p>\n

Une contribution majoritairement fran\u00e7aise !<\/h3>\n

[\/vc_column_text][vc_column_text]Ce projet a n\u00e9cessit\u00e9 la contribution internationale de nombreuses entreprises et organisations, mais surtout fran\u00e7aise avec le soutien du CNRS, de l\u2019Observatoire de Paris-PSL, l\u2019Observatoire de la C\u00f4te d\u2019Azur et le GEPI.<\/p>\n

SEDI-ATI Fibres Optiques a quant \u00e0 elle travaill\u00e9 \u00e0 la conception du LIFU et d\u2019un MOS par le design, la mise en place de proc\u00e9d\u00e9s de fabrication et l\u2019assemblage des ensembles fibr\u00e9s.<\/p>\n

De par nos multiples contributions dans la conception d\u2019ensembles fibr\u00e9s complexes pour grands instruments comme GIRAFFE, MEGARA ou MOONS, nous avons apport\u00e9 notre expertise dans le choix des mat\u00e9riaux, des fibres, et des gaines de protection. Et nous avons fabriqu\u00e9 et livr\u00e9 1 LIFU compact\u00e9 en module hexagonal et 1 MOS compos\u00e9 de 40 torons de 24 fibres de 33 m\u00e8tres de long, ce qui repr\u00e9sente au total un travail avec plus de 1\u00a0500 fibres optiques sur pr\u00e8s de 50 kilom\u00e8tres.<\/p>\n

L\u2019ensemble a \u00e9t\u00e9 con\u00e7u et assembl\u00e9 avec l\u2019assurance de conserver un taux de transmission d\u2019informations optimal avec un taux remarquable de voies endommag\u00e9es inf\u00e9rieur \u00e0 10-3<\/sup>.<\/p>\n

Pour aller plus loin, d\u00e9couvrez notre \u00e9tude de cas\u00a0\u00ab WEAVE : Le spectrographe multi-fibres qui va percer de grandes \u00e9nigmes de l\u2019Univers \u00bb<\/a>[\/vc_column_text][\/vc_column][vc_column width=\u00a0\u00bb1\/2″][vc_column_text el_class=\u00a0\u00bbpetit-titre petit-titre-txt petit-titre-txt-p\u00a0\u00bb]<\/p>\n

3 modes d\u2019observation<\/h3>\n

[\/vc_column_text][vc_column_text]Les fibres optiques du spectrographe conduisent \u00e0 trois g\u00e9om\u00e9tries\u00a0sp\u00e9cifiques :<\/p>\n

    \n
  • 2 MOS (multi-object spectroscopy) de 1008+960 fibres, pour l\u2019observation des objets ponctuels individuels.<\/li>\n
  • 20 mIFUs (mini integral-field units) de 37 fibres chacun, pour l\u2019observation des objets \u00e9tendus avec de petites int\u00e9grales de champ.<\/li>\n
  • 1 LIFU (large integral-field unit) de 547 fibres, pour l\u2019observation d\u2019une grande int\u00e9grale de champ.<\/li>\n<\/ul>\n

    [\/vc_column_text][\/vc_column][\/vc_row][vc_row full_width=\u00a0\u00bbstretch_row\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1681826081894{background-color: #a4a9ad !important;}\u00a0\u00bb][vc_column][vc_row_inner][vc_column_inner width=\u00a0\u00bb1\/6″][\/vc_column_inner][vc_column_inner el_class=\u00a0\u00bbshadow border-radius-hd-bd line-bottom line-blue\u00a0\u00bb width=\u00a0\u00bb2\/3″ css=\u00a0\u00bb.vc_custom_1679652604813{background-color: #ffffff !important;}\u00a0\u00bb][vc_column_text el_class=\u00a0\u00bbbaseline\u00a0\u00bb]<\/p>\n

    N\u2019h\u00e9sitez pas \u00e0 vous rapprocher de nous et \u00e0 nous faire part de votre demande sp\u00e9cifique<\/p>\n

    [\/vc_column_text][vc_btn title=\u00a0\u00bbDemande de devis\u00a0\u00bb style=\u00a0\u00bbcustom\u00a0\u00bb custom_background=\u00a0\u00bb#132f40″ custom_text=\u00a0\u00bb#ffffff\u00a0\u00bb shape=\u00a0\u00bbsquare\u00a0\u00bb align=\u00a0\u00bbcenter\u00a0\u00bb link=\u00a0\u00bburl:https%3A%2F%2Fwww.sedi-ati.com%2Fcontact%2F|title:Contact\u00a0\u00bb el_class=\u00a0\u00bbline-bottom line-blue\u00a0\u00bb][\/vc_column_inner][vc_column_inner width=\u00a0\u00bb1\/6″][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row][vc_column][vc_btn title=\u00a0\u00bb^\u00a0\u00bb style=\u00a0\u00bbflat\u00a0\u00bb shape=\u00a0\u00bbsquare\u00a0\u00bb link=\u00a0\u00bburl:%23Wrapper\u00a0\u00bb el_class=\u00a0\u00bbbtn-haut\u00a0\u00bb][\/vc_column][\/vc_row]<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"

    WEAVE (WHT Enhanced Area Velocity Explorer), est un spectrographe multifibres du t\u00e9lescope William Herschel.<\/p>\n","protected":false},"author":7,"featured_media":19663,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","footnotes":""},"categories":[52001],"tags":[],"class_list":["post-8604","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innovation"],"acf":[],"yoast_head":"\nWEAVE : Premi\u00e8re lumi\u00e8re d\u00e9tect\u00e9e par le spectrographe nouvelle g\u00e9n\u00e9ration<\/title>\n<meta name=\"description\" content=\"Apprenez-en plus sur WEAVE, ce spectrographe nouvelle g\u00e9n\u00e9ration qui observ\u00e9 sa premi\u00e8re lumi\u00e8re en d\u00e9cembre 2022 et sur la contribution fran\u00e7aise SEDI-ATI .\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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