{"id":2189,"date":"2025-04-24T00:00:00","date_gmt":"2025-04-24T00:00:00","guid":{"rendered":"urn:uuid:a685e6b6-14ba-4bbc-afd1-8a19ec8e66d3"},"modified":"2025-04-24T00:00:00","modified_gmt":"2025-04-24T00:00:00","slug":"mu-xing-k18-2karakuruguang-zi-shu-nojian-ji-mori","status":"publish","type":"post","link":"https:\/\/www.sekaiken.com\/?p=2189","title":{"rendered":"\u6bcd\u661fK18-2\u304b\u3089\u304f\u308b\u5149\u5b50\u6570\u306e\u898b\u7a4d\u3082\u308a"},"content":{"rendered":"

124\u5149\u5e74\u96e2\u308c\u305f\u60d1\u661fK18-2b\u306b\u30b8\u30e1\u30c1\u30eb\u30b9\u30eb\u30d5\u30a3\u30c9\u304c\u5b58\u5728\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u7d50\u679c\u306e\u30b9\u30da\u30af\u30c8\u30eb\u306f\u4e0b\u8a18\u3067\u3059\u3002
\nhttps:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/09\/sep-11-23-stsci-01h9rf4t1ems9mpnxfmm99n18f-2k.jpg
\n\u30c7\u30fc\u30bf\u70b9\u304c\u767d\u306e\u4e38\u306b\u7e26\u68d2\u3067\u3059\u3002\u3053\u308c\u304c\u9752\u3044\u66f2\u7dda\u3067\u3042\u308d\u3046\u3068\u63a8\u6e2c\u3057\u3066\u3044\u307e\u3059\u3002\u76f4\u611f\u7684\u306b\u306f\u300c\u672c\u5f53\u304b\u306a\uff1f\uff1f\u300d\u3068\u3044\u3046\u3068\u3053\u308d\u3067\u3059\u304c\u3001\u304a\u305d\u3089\u304f\u30d9\u30a4\u30ba\u7d71\u8a08\u3092\u4f7f\u3063\u305f\u30d5\u30a3\u30c3\u30c6\u30a3\u30f3\u30b0\u3067\u51fa\u3066\u304f\u308b\u306e\u3067\u3057\u3087\u3046\u3002S\/N\u3092\u9ad8\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u5149\u306e\u91cf\u304c\u975e\u5e38\u306b\u5c11\u306a\u3044\u306e\u3067\u9650\u754c\u304c\u3042\u308a\u307e\u3059\u3002\u3069\u306e\u304f\u3089\u3044\u306e\u5149\u5b50\u6570\u304b\u3001\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002
\n\u6bcd\u661fK18-2\u306b\u3064\u3044\u3066\u306e\u30c7\u30fc\u30bf\u306f\u4e0b\u8a18\u306b\u3042\u308a\u307e\u3057\u305f\u3002\u3053\u306e\u30b5\u30a4\u30c8\u306f\u6052\u661f\u306e\u8a73\u7d30\u304c\u8f09\u3063\u3066\u3044\u3066\u9762\u767d\u305d\u3046\u3067\u3059\u3002
\nhttps:\/\/www.stellarcatalog.com\/stars\/k2-18
\n\u592a\u967d\u306e\u5927\u304d\u3055\uff08\u76f4\u5f84\uff09\u306e40%=13927000.4=5.6 E8m \u3067\u3001\u8868\u9762\u6e29\u5ea6\u306f3464K\u3060\u305d\u3046\u3067\u3059\u3002\u3053\u308c\u306b\u9ed2\u4f53\u8f3b\u5c04\u306ePlank\u306e\u5f0f\u3092\u5f53\u3066\u306f\u3081\u307e\u3059\u3002
\nhttps:\/\/ja.wikipedia.org\/wiki\/%E3%83%97%E3%83%A9%E3%83%B3%E3%82%AF%E3%81%AE%E6%B3%95%E5%89%87
\nI’(\u03bb,T)=(2hc^2\/\u03bb^5)\/(exp(hc\/\u03bbkT)-1) [J s-1 m-2 sr-1 m-1]\u3067\u3059\u3002
\n\u7acb\u4f53\u89d2(sr\u30b9\u30c6\u30e9\u30b8\u30a2\u30f3)\u3042\u305f\u308a\u3001\u0394\u03bb\u3042\u305f\u308a\u30011\u79d2\u5f53\u305f\u308a\u3001\u8868\u9762\u7a4d\u3042\u305f\u308a\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u3067\u3059\u3002\u03bb\u306f3\u03bcm=3E-6m, \u0394\u03bb\u306f\u30c7\u30fc\u30bf\u70b9\u306e\u9593\u9694\u304c0.1\u03bcm\u304f\u3089\u3044\u306a\u306e\u3067\u30011E-7 m\u3068\u3057\u307e\u3059\u3002
\n\u7acb\u4f53\u89d2\u306f\u3001\u8996\u91ce\u89d2 1.7\u00d710^-9 \u5ea6\u306e\u7d04\uff12\u4e57\u3092\u30e9\u30b8\u30a2\u30f3\u3067\u8a08\u7b97\u3059\u308c\u3070\u3088\u304f\u30669E-22 sr
\n\u8868\u9762\u7a4d\u306f4\u03c0r^2=\u03c0<\/em>(5.6E8)^2=9.9E17 m2
\n\u4e0a\u8a18\u306e\u5024\u3092\u4ee3\u5165\u3059\u308b\u3068 I’=14 J s-1 \u3068\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3042\u307e\u308a\u306b\u3082\u5927\u304d\u3044\u306e\u3067\u3069\u3053\u304b\u9593\u9055\u3063\u3066\u3044\u307e\u3059\u3002
\n\u3088\u304f\u8003\u3048\u308b\u3068\u3001\u8868\u9762\u7a4d\u3068\u3044\u3046\u306e\u306b\u661f\u306e\u8868\u9762\u7a4d\u3092\u8003\u3048\u308b\u306e\u306f\u9593\u9055\u3063\u3066\u3044\u3066\u3001\u53d7\u5149\u5668\u304c\u661f\u306e\u5927\u304d\u3055\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u8868\u9762\u7a4d\u3092\u5909\u3048\u308b\u304b\u3001\u7acb\u4f53\u89d2\u3092\u53d7\u5149\u5668\u306b\u5408\u308f\u305b\u305f\u5024\u306b\u3059\u308b\u304b\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u5024\u306f\u540c\u3058\u306b\u306a\u308a\u307e\u3059\u3002\u5b9f\u969b\u306e\u53d7\u5149\u5668\u306f\u3001\u305b\u3044\u305c\u30441m\u89d2\u3068\u3057\u3066\u30011m2\u3092\u4f7f\u3046\u3068\u3001
\nI’=1.5E-17 J s-1\u3067\u3059\u3002
\n3\u03bcm\u306e\u5149\u5b50\uff11\u500b\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u306f h\u03bd=hc\/\u03bb= 6.6E-20 J \u306a\u306e\u3067\u3001
\n1\u79d2\u5f53\u305f\u308a\u306e\u5149\u5b50\u6570\u306f I’\/h\u03bd = 224 \u500b \u3067\u3059\u3002\u3053\u308c\u3067\u3082\u601d\u3063\u305f\u3088\u308a\u591a\u3044\u3067\u3059\u306d\u3002\u3088\u304f\u898b\u308b\u3068\u3001\u7e26\u8ef8\u304c”amount of light blocked”\u30670.28%\u304b\u30890.31%\u306e\u9593\u3092\u30b0\u30e9\u30d5\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u6bcd\u661f\u306e\u65b9\u304c\u60d1\u661f\u5927\u6c17\u5c64\u3088\u308a\u3082\u305a\u3063\u3068\u5927\u304d\u3044\u306e\u3068\u3001\u30b8\u30e1\u30c1\u30eb\u30b9\u30eb\u30d5\u30a3\u30c9\u306e\u6fc3\u5ea6\u304c\u8584\u3044\u306e\u3067\u3057\u3087\u3046\u3002\u3068\u3093\u3067\u3082\u306a\u304f\u7cbe\u5bc6\u306a\u6e2c\u5b9a\u3067\u3059\u3002\u30a8\u30e9\u30fc\u30d0\u30fc\u304c0.01%\u304f\u3089\u3044\u3042\u308a\u307e\u3059\u3002\u30ab\u30a6\u30f3\u30c8\u6570N\u306e\u5e73\u65b9\u6839\u304c\u30a8\u30e9\u30fc\u30d0\u30fc\u3060\u3068\u3059\u308b\u306e\u304c\u5b9a\u77f3\u3067\u3001\u3053\u308c\u3092\u4f7f\u3046\u3068\u3001\u0394N\/N=\u221aN\/N=N^(-1\/2)=0.01%=1E-4\u3092\u89e3\u3044\u3066\u3001N=1E8\u306b\u306a\u308a\u307e\u3059\u3002\u79d2\u3042\u305f\u308a224\u30ab\u30a6\u30f3\u30c8\u30671\u5104\u30ab\u30a6\u30f3\u30c8\u8caf\u3081\u3088\u3046\u3068\u601d\u3046\u3068450000\u79d2=5\u65e5\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u8cb4\u91cd\u306a\u5b87\u5b99\u671b\u9060\u93e1\u306e\u6e2c\u5b9a\u6642\u9593\u3068\u3057\u3066\u306f\u59a5\u5f53\u3060\u3068\u601d\u3044\u307e\u3059\u3002\u691c\u51fa\u5668\u304c1m\u304f\u3089\u3044\u306e\u5927\u304d\u3055\u3068\u3044\u3046\u63a8\u6e2c\u304c\u305d\u3093\u306a\u306b\u5916\u308c\u3066\u3044\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u82f1\u8a9e\u306f\u3001 stellarcatalog.com\u3067\u7d39\u4ecb\u3055\u308c\u3066\u3044\u305f\u3000https:\/\/arxiv.org\/abs\/2504.13039 \u304b\u3089\u3002<\/p>\n

stellar \u6052\u661f
\nJWST \u30b8\u30a7\u30fc\u30e0\u30ba\u30fb\u30a6\u30a7\u30c3\u30d6\u5b87\u5b99\u671b\u9060\u93e1
\n“for which two different interpretations, a high-metallicity miscible envelope and a lower metallicity hycean world, are currently in conflict. Aims: Here, we reanalyze the published data and reproduce previously retrieved molecular abundances based on an independent data reduction and a different retrieval framework.”
\nmiscible \u30df\u30b9\u30a3\u30d6\u30eb\u3000\u6df7\u3058\u308b\u3053\u3068\u304c\u3067\u304d\u308b
\nretrieve \u53d6\u5f97\u3059\u308b
\nframework \u67a0\u7d44\u307f
\nmolecular abundances \u5206\u5b50\u306e\u8c4a\u5bcc\u3055
\n\u201dMethods: We reduce one JWST NIRSpec G395H and one NIRISS SOSS GR700XD transit dataset using the Eureka! pipeline and a custom MCMC-based light curve fitting algorithm at the instruments’ native resolutions.\u201d
\ntransit \u98db\u884c\u6a5f\u306e\u4e57\u308a\u7d99\u304e\u3001\u79fb\u52d5\u4e2d\u306e\u3000\u304f\u3089\u3044\u3067\u3057\u3087\u3046\u304b\u3002\u904e\u6e21\u7684\u3060\u3068transient\u306a\u306e\u3067\u9055\u3044\u307e\u3059\u3002
\nEureka! \u306f\u30a2\u30eb\u30ad\u30e1\u30c7\u30b9\u306e\u300c\u308f\u304b\u3063\u305f\u305e\uff01\u300d\u3067\u3059\u304c\u3001\u5b87\u5b99\u63a2\u67fb\u6a5f\u3084\u30d7\u30ed\u30b0\u30e9\u30e0\u306a\u3069\u3044\u308d\u3044\u308d\u306a\u540d\u524d\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002
\nMCMC Markov-chain Monte Carlo \u53d6\u308a\u6271\u3048\u306a\u3044\u304f\u3089\u3044\u591a\u304f\u306e\u30c7\u30fc\u30bf\u70b9\u304b\u3089\u78ba\u7387\u7684\u306b\u30c7\u30fc\u30bf\u3092\u62fe\u3063\u3066\u3044\u3063\u3066\u8fd1\u4f3c\u8a08\u7b97\u3092\u3059\u308b\u624b\u6cd5\u3002\u8b1b\u7fa9\u3067\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002\u30a8\u30e0\u30b7\u30fc\u30a8\u30e0\u30b7\u30fc\u3068\u8aad\u3080\u3053\u3068\u304c\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002 \u3000https:\/\/ja.wikipedia.org\/wiki\/%E3%83%9E%E3%83%AB%E3%82%B3%E3%83%95%E9%80%A3%E9%8E%96%E3%83%A2%E3%83%B3%E3%83%86%E3%82%AB%E3%83%AB%E3%83%AD%E6%B3%95<\/p>\n","protected":false},"excerpt":{"rendered":"

124\u5149\u5e74\u96e2\u308c\u305f\u60d1\u661fK18-2b\u306b\u30b8\u30e1\u30c1\u30eb\u30b9\u30eb\u30d5\u30a3\u30c9\u304c\u5b58\u5728\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u7d50\u679c\u306e\u30b9\u30da\u30af\u30c8\u30eb\u306f\u4e0b\u8a18\u3067\u3059\u3002 https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/09\/sep-11-23-stsci-01h9rf4t1ems9mpnxfmm99n18f-2k.jpg \u30c7\u30fc\u30bf\u70b9\u304c\u767d\u306e\u4e38\u306b\u7e26\u68d2\u3067\u3059\u3002\u3053\u308c\u304c\u9752\u3044\u66f2\u7dda\u3067\u3042\u308d\u3046\u3068\u63a8\u6e2c\u3057\u3066\u3044\u307e\u3059\u3002\u76f4\u611f\u7684\u306b\u306f\u300c\u672c\u5f53\u304b\u306a\uff1f\uff1f\u300d\u3068\u3044\u3046\u3068\u3053\u308d\u3067\u3059\u304c\u3001\u304a\u305d\u3089\u304f\u30d9\u30a4\u30ba\u7d71\u8a08\u3092\u4f7f\u3063\u305f\u30d5\u30a3\u30c3\u30c6\u30a3\u30f3\u30b0\u3067\u51fa\u3066\u304f\u308b\u306e\u3067\u3057\u3087\u3046\u3002S\/N\u3092\u9ad8\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u5149\u306e\u91cf\u304c\u975e\u5e38\u306b\u5c11\u306a\u3044\u306e\u3067\u9650\u754c\u304c\u3042\u308a\u307e\u3059\u3002\u3069\u306e\u304f\u3089\u3044\u306e\u5149\u5b50\u6570\u304b\u3001\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002 \u6bcd\u661fK18…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[48],"tags":[11],"class_list":["post-2189","post","type-post","status-publish","format-standard","hentry","category-spaceandearth","tag-spaceandearth"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts\/2189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2189"}],"version-history":[{"count":0,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts\/2189\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}