{"id":11274,"date":"2024-11-27T23:26:48","date_gmt":"2024-11-27T22:26:48","guid":{"rendered":"https:\/\/spectro-uvex.tech\/?p=11274"},"modified":"2024-11-27T23:30:05","modified_gmt":"2024-11-27T22:30:05","slug":"red-shift-m77","status":"publish","type":"post","link":"https:\/\/spectro-uvex.tech\/?p=11274","title":{"rendered":"Red shift de M77"},"content":{"rendered":"\t\t
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M77 SDSS9 color<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Caract\u00e9ristiques G\u00e9n\u00e9rales<\/h2>
  • Type de Galaxie<\/strong> : Galaxie spirale barr\u00e9e.<\/li>
  • Distance<\/strong> : Environ 47 millions d’ann\u00e9es-lumi\u00e8re de la Terre.<\/li>
  • Taille<\/strong> : Diam\u00e8tre d’environ 170 000 ann\u00e9es-lumi\u00e8re.<\/li>
  • Magnitude Apparente<\/strong> : Environ 9,6.<\/li><\/ul>

    Noyau Actif<\/h2>

    M77 est c\u00e9l\u00e8bre pour son noyau actif, class\u00e9 comme une galaxie de Seyfert de type 2 c’est \u00e0 dire obscurci par des nuages de poussi\u00e8res et de gaz. Le noyau est aliment\u00e9 par un trou noir supermassif entour\u00e9 d’un disque d’accr\u00e9tion, \u00e9mettant une grande quantit\u00e9 de radiation. Le gaz ionis\u00e9 par le rayonnement intense du disque d’accr\u00e9tion autour du trou noir supermassif, engendre des raies en \u00e9mission en particuler la raies OIII \u00e0 5007A et les raies\u00a0<\/span>H<\/span>\u03b1 et H\u03b2.<\/span><\/p>

    Structure et Morphologie<\/h2>

    M77 pr\u00e9sente une structure en spirale avec une barre centrale et des bras spiraux bien d\u00e9finis, contenant de nombreuses r\u00e9gions de formation d’\u00e9toiles.<\/p>

    Observations et \u00c9tudes<\/h2>

    M77 a \u00e9t\u00e9 \u00e9tudi\u00e9e en d\u00e9tail \u00e0 l’aide de divers t\u00e9lescopes, y compris Hubble, Chandra, et le VLA, permettant de mieux comprendre la dynamique du noyau actif et les processus de formation d’\u00e9toiles.<\/p>

    Environnement<\/h2>

    M77 fait partie d’un groupe de galaxies, mais n’est pas membre d’un amas de galaxies majeur, permettant une \u00e9tude isol\u00e9e de ses propri\u00e9t\u00e9s.<\/p>

    Importance Scientifique<\/h2>


    L’\u00e9tude de M77 est cruciale pour comprendre les noyaux actifs de galaxies et les processus de formation d’\u00e9toiles, servant de laboratoire naturel pour \u00e9tudier les trous noirs supermassifs.<\/p>

    Spectre de M77 en basse r\u00e9solution \u00e0 l’UVEX4i<\/sup> mesure de redshift.<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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    Pendant l'acquisition des spectres, panneau de contr\u00f4le du logiciel d'acquisition CCDciel (Patrick Chevalley)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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    La raie OIII normalement observ\u00e9e \u00e0 la longueur d’onde 5007A est d\u00e9cal\u00e9e vers le rouge \u00e0 5025A. On peut noter aussi que la raie H\u03b1 est, elle aussi d\u00e9cal\u00e9e vers le rouge mais d’une quantit\u00e9 plus importante. Ce d\u00e9calage qui est proportionnel \u00e0 la longueur d’onde est l’effet Dopler de la vitesse de fuite de M77 par rapport \u00e0 nous.\u00a0 On peut calculer le Red shift Z avec la formule z= \\frac{\\Delta\\lambda}{\\lambda} <\/span> et comparer avec les donn\u00e9es scientifiques. Sur le site du CDS M77 est donn\u00e9e pour un Red shift de\u00a00.00348372, notre calcul donne 0,0036 ce qui est honorable. La vitesse d’\u00e9loignement de M77 est donc de 1043 km\/s.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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    Pierre - C14 - TAC observatoire de Calern.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

    M77 SDSS9 color Caract\u00e9ristiques G\u00e9n\u00e9rales Type de Galaxie : Galaxie spirale barr\u00e9e. Distance : Environ 47 millions d’ann\u00e9es-lumi\u00e8re de la Terre. Taille : Diam\u00e8tre d’environ 170 000 ann\u00e9es-lumi\u00e8re. Magnitude Apparente : Environ 9,6. Noyau Actif M77 est c\u00e9l\u00e8bre pour son noyau actif, class\u00e9 comme une galaxie de Seyfert de type 2 c’est \u00e0 dire obscurci […]<\/p>\n","protected":false},"author":5,"featured_media":11276,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","_jetpack_memberships_contains_paid_content":false,"ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[114],"tags":[],"class_list":["post-11274","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-quoi-ca-sert-fr","entry","has-media","owp-thumbs-layout-horizontal","owp-btn-normal","owp-tabs-layout-horizontal","has-no-thumbnails","has-product-nav"],"jetpack_featured_media_url":"https:\/\/spectro-uvex.tech\/wp-content\/uploads\/2024\/11\/m77.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=\/wp\/v2\/posts\/11274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11274"}],"version-history":[{"count":11,"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=\/wp\/v2\/posts\/11274\/revisions"}],"predecessor-version":[{"id":11290,"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=\/wp\/v2\/posts\/11274\/revisions\/11290"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=\/wp\/v2\/media\/11276"}],"wp:attachment":[{"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spectro-uvex.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&pos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