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NHK カルチャー講座 〜系外惑星(第1回)
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Takanori Sasaki
February 08, 2017
Education
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NHK カルチャー講座 〜系外惑星(第1回)
NHK カルチャー講座「惑星科学最前線 〜系外惑星 「第二の地球」を探して〜」の第1回目の講義資料です。
Takanori Sasaki
February 08, 2017
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Transcript
20171݄22ɹNHKΧϧνϟʔകాڭࣨ Պֶ࠷લઢ ɹʙܥ֎ ʮୈೋͷٿʯΛ୳ͯ͠ʙɹ ژେֶ Ӊཧֶڭࣨɹࠤʑوڭ
ࣗݾհ ࠤʑوڭʢ͖͔ͨ͞͞ͷΓʣ ژେֶɹେֶӃཧֶݚڀՊɹཧֶɾӉཧֶઐ߈ Ӊཧֶڭࣨɹॿڭ ݄ʹ౦ژେֶͰֶҐΛऔಘ ઐlͷܗͱਐԽzͷཧݚڀ
ɹܥͲͷΑ͏ʹͯ͠࡞ΒΕΔͷ͔ ɹܥͲͷΑ͏ʹਐԽ͍ͯ͘͠ͷ͔ ɹ զʑԿॲ͔ΒདྷͯԿॲߦ͘ͷ͔ʁ ੜ໋Λ॓͢lୈೋͷٿzଘࡏ͢Δ͔ʁ (c) NASA
ߨ࠲ͷ༰ ✤ ܥ֎ͷൃݟͱͦͷ؍ଌख๏ ɹੈلͷେൃݟ͜͏ͯ͠ߦΘΕͨ ✤ ଟ༷ͳܥ֎ͷհͱͦͷܗཧ ɹҟܗͷͨͪͷ࡞Γํ ✤ ੜ໋Λ॓͢ͷ݅ͱ࠷৽ͷ؍ଌ݁Ռ ɹఱͷʹු͔Ϳʮٿͨͪʯ
ߨ࠲ͷ༰ ✤ ܥ֎ͷൃݟͱͦͷ؍ଌख๏ ɹੈلͷେൃݟ͜͏ͯ͠ߦΘΕͨ ✤ ଟ༷ͳܥ֎ͷհͱͦͷܗཧ ɹҟܗͷͨͪͷ࡞Γํ ✤ ੜ໋Λ॓͢ͷ݅ͱ࠷৽ͷ؍ଌ݁Ռ ɹఱͷʹු͔Ϳʮٿͨͪʯ
ଠཅܥ֎ͷൃݟ (c) ߴ෦
ଠཅܥ֎ ଠཅܥɿଠཅΛத৺ͱ͢ΔզʑͷॅΉܥ ɹɹɹɹʢਫɾۚɾɾՐɾɾɾఱɾւʣ ଠཅܥ֎ɿଠཅҎ֎ͷ߃ͷपΓΛճΔܥ (c) NASA (c) େࡕڭҭେֶ
ʙɿ ɹനௗ࠲൪ͷ·ΘΓʹൃݟʁ ɹόʔφʔυͷ·ΘΓʹͭͷൃݟʁ ݄ɿจʮଠཅܥಛघͰحతͳܥͰ͋Δʯ ɿ ɹχϡʔδʔϥϯυͷ؍ଌνʔϜʮݕग़Ͱ͖ͳ͔ͬͨʯ ݄ɿจʮଠཅܥҎ֎ʹଘࡏͤͣʯ ˠؒҧ͍ ɹɹˠؒҧ͍ ଠཅܥ֎͕ݟ͔ͭΒͳ͍
ɿ ɹΞϝϦΧͷ؍ଌνʔϜʮݕग़Ͱ͖ͳ͔ͬͨʯ
.BZPS2VFMP[ εΠεͷ؍ଌνʔϜ ϖΨαε࠲൪ͷपΓʹ)PU+VQJUFS͕ଘࡏʂ ݄ ਓྨॳͷܥ֎ൃݟ (c) NASA (c) Michel
Mayor
$BNCFMM8BMLFS ΧφμνʔϜɿෆӡ ɾʹݱࡏओྲྀͷ؍ଌख๏ͷΞΠσΞΛఏҊ ɾݸͷ߃Λ؍ଌ͢Δ͕ɺݕग़Ͱ͖ͣ ɹʢ˞ڊେͷݕग़֬ఔʣ ɾݸͷ͏ͪݸʹɺͦͷޙ͕ݕग़͞Εͨ ɾผ్ใࠂͨ͠࿈Ͱɺͦͷޙ͕ݕग़͞Εͨ ਓྨॳͷܥ֎ൃݟ·Ͱ -BUIBN
ΞϝϦΧνʔϜɿΓෆӡ ɾʹ߃ͷपΓΛճΔఱମΛݕग़ ɾͦͷޙ࣭ྔ͕ܾఆɺͱͯ͠Χϯτ͞Εͨ
.BSDZ#VUMFS ΞϝϦΧνʔϜɿຊ໋ ɾؒʹΘͨΓݸͷ߃Λௐࠪ ɾ͔͠͠ɺσʔλղੳΛਐΊ͍ͯͳ͔ͬͨʂ ɹʢ˞ଠཅܥͷઌೖ؍ɿͷެసपظʣ ɾσʔλղੳޙɺؒͰݸͷΛ࣍ʑͱൃݟ ਓྨॳͷܥ֎ൃݟ·Ͱ .BZPS2VFMP[ εΠενʔϜɿμʔΫϗʔε
ɾ݄ɿ୳͠ϓϩδΣΫτ։࢝ ɾ݄ɿ࠷ॳʹϖΨαε࠲൪Λ؍ଌ ɾ݄ɿ࠶؍ଌΛߦ͍ൃݟΛ֬ఆ
ଠཅܥ֎͕ଓʑͱݟ͔ͭΔ ൃݟ ൃݟ
ٿ ٿΑΓଆͷيಓʹ Λ͑Δڊେ ҟܗͷͨͪʢ̍ʣ
ऊͷ த৺ͷͰߴԹʹͳΓ େؾ͕ுɾྲྀग़͍ͯ͠Δ l)PU+VQJUFSz (c) NASA (c) Harvard-Smithsonian CfA
ٿ يಓ৺͕ߴ͍͕ଟ͍ ʢପԁيಓΛඳ͕͘ଟ͍ʣ ҟܗͷͨͪʢ̎ʣ
ۃॵɾۃפΛ܁Γฦ͢ପԁيಓ l&DDFOUSJD1MBOFUz http://clccharter.org (c) clccharter.org Laughlin et al. (2009)
ٿ ࣭ྔ͕ٿͷ ഒʙഒ ఔͷٿܕ ҟܗͷͨͪʢ̏ʣ l4VQFS&BSUIz (c) NASA
ଠཅܥʹଘࡏ͠ͳ͍λΠϓͷڊେ ҟܗͷͨͪʢ̐ʣ l.JOJ/FQUVOFzl4VQFS+VQJUFSz (c) http://astronesia.blogspot.jp (c) Drew Ex Machina
Breakɿܥ֎σʔλϕʔε
ܥ֎ͷσʔλΛௐΔ ɾThe Extrasolar Planets Encyclopaedia ɾExoplanet Oribit Database ɾExoplanet for
iPhone/iPad/iPod touch http://exoplanet.eu http://exoplanets.org
None
None
ଟ༷ͳϋϏλϒϧϓϥωοτͷՄೳੑ ɾϋϏλϒϧϓϥωοτͷݚڀະͩൃల్্ ɹɹˠ༷ʑͳΞΠσΞՄೳੑΛൺֱݕ౼͢Δ͜ͱͰ ɹɹɹʮୈೋͷٿʯʹ͍ͭͯͷ૯߹తͳݟΛಘΔ (c) NASA/Exoplanetkyoto
ຊͷఱจѪՈͷΛܥ֎ʂ ɾຊҰྲྀͷΞϚνϡΞఱจՈͷๅݿ ɹɹˠܥ֎ͱ͍͏ʮϒϧʔɾΦʔγϟϯʯΛ ɹɹɹҰؾʹΓ͚ΔՄೳੑ͕͋Δ (c) Wikipedia
ܥ֎ʹؔ͢ΔຊॳϙʔλϧαΠτ ܥ֎ΛோΊΔ ܥ֎ͷ࢟ΛΔ ܥ֎ʹֶ͍ͭͯͿ ܥ֎σʔλͰ༡Ϳ ͞Βʹͦͷઌ…
ଠཅܥ֎ͷ؍ଌख๏ (c) Sean Geobel
҉͗͢Δɺ໌Δ͗͢Δத৺ ← த৺ˠ
҉͗͢Δɺ໌Δ͗͢Δத৺ ← த৺ˠ
߃ͱڞʹڞ௨ॏ৺ͷपΓΛ ճ͍ͬͯΔ ɹˠ߃ͷॏ৺͔ΒͷͣΕΛ؍ଌ ্ԕڸʹΑΔݕग़ۃΊͯࠔ ؒ๏̍ɿΞετϩϝτϦ๏ (c) blog.goo.ne.jp/toyokoka0119
߃͕؍ଌऀʹ͍ۙͮͨΓ ԕ͔ͬͨ͟Γ͢Δ ɹˠυοϓϥʔޮՌʹΑͬͯ ɹɹͷ৭͕पظతʹมԽ ɹˠ߃ͷͷมԽΛ؍ଌ த৺ʹ࣭ۙ͘ྔͷେ͖͍ ΄Ͳൃݟ͍͢͠ʢબޮՌʣ υοϓϥʔޮՌͷେ͖͔͞Β ͷ࣭ྔʢͷԼݶʣ͕ٻ·Δ ؒ๏̎ɿࢹઢ๏
(c) φϏ.com
46 1995 ͜ͷޙଟ͘ͷܥ֎͕ ຊख๏Ͱൃݟ͞Ε͍ͯΔ 1FHBTJC ɹॳΊͯͷܥ֎ൃݟ (c) NASA
͕߃ͷલΛ௨ա͢Δࡍʹ໌Δ͕͞มԽ͢Δ ɹˠपظతͳ໌Δ͞ͷมԽΛ؍ଌ ͷαΠζ͕ٻ·Δˠͷີ͕ٻ·Δ ޫ؍ଌ͔Βͷେؾ͕ٻ·Δ ؒ๏̏ɿτϥϯδοτ๏ (c) ւಓେֶ
͕߃ͷޙΖΛ௨ա͢Δࡍʹ໌Δ͕͞มԽ͢Δ ɹˠޫ؍ଌʹΑΓͷಛΛ؍ଌ ͷେؾ ͷனଆͷԹ ͷԹ ͷ༌ૹޮ ͷيಓ৺ Θ͔Δ͜ͱ 4FDPOEBSZ&DMJQTF Tinetti
(2007)
τϥϯδοτ๏ʹΑΔ؍ଌྫ
)%C ॳΊͯτϥϯδοτ͕؍ଌ ͞Εͨܥ֎ ॳΊͯେؾ͕؍ଌ͞Εͨ ɹԼ෦ɿφτϦϜ ɹ্෦ɿਫૉɾૉɾࢎૉ ද໘Թ؍ଌɿˆ ͞Βʹͦͷޙͷ؍ଌͰ ɹਫɾϝλϯɾೋࢎԽૉͷ ɹଘࡏ֬ೝ͞Εͨ
(c) NASA
ఱମͷपΓͰۭ͕ؒΈɺޫͷܦ࿏͕ۂ͕Δ ɹˠ͋Δ߃ͷલΛผͷ߃ʢʣ͕ԣΔͱ ɹɹഎޙͷ߃ͷޫ͕૿ޫ͞ΕΔ ɹˠʹΑΔഎޙͷ߃ͷޫͷ૿ޫΛ؍ଌ ݕग़͍֬ ؍ଌ̍ճ͖Γ يಓܘd"6ʹ͋Δ খ͞ͳ͕ݕग़Մೳ ؒ๏̐ɿॏྗϨϯζ๏ (c)
backreaction.blogspot.jp
0(-&#-( ॏྗϨϯζ๏ʹΑΔ؍ଌྫ Beaulieu et al. (2006)
໊শ ํ๏ ಛ ΞετϩϝτϦ๏ ߃ͷҐஔͷͣΕ ্͔Β͍͠ ࢹઢ๏ ʢυοϓϥʔ๏ʣ ߃ͷಈ͖ͷ͞ ͷ࣭ྔͷԼݶ
͕ٻ·Δ τϥϯδοτ๏ ʹΑΔ ߃ͷ৯ ͷີ େؾ͕ٻ·Δ ॏྗϨϯζ๏ ॏྗʹΑΔ ۭؒͷΈ ݕग़֬খɺ يಓܘ1~3AU ؒ๏ͷछྨͱಛͷ·ͱΊ
ίϩφάϥϑɿத৺ͷ෦͚ͩΛӅ͢ ิঈޫֶ "0 ɿେؾʹΑΔը૾ͷ༳Β͗Λิਖ਼ ͱத৺ͷޫΛ͠ɺΛࡱ૾͢Δ ίϩφάϥϑ ิঈޫֶ ԯഒʹୡ͢Δɻதؒ֎ΑΓ Ͱࣗମͷ์ࣹͷͨΊ྆ऀ ͷ໌Δ͞ͷൺଟগ؇͞ΕΔ͕ɺͦΕ
ͰສഒͱͳΔɻ ɹ্؍ଌͷ࠷େͷোนٿେؾͷ༳ Β͕͗ى͔͛͜͢Ζ͏Ͱ͋Δɻ ݱࡏɺ ͢ ΔԕڸͳͲͷޱܘʙNڃͷ্େ ԕڸͰɺେؾ༳Β͗Λ࣌ʑࠁʑͱิ ਖ਼͢Δิঈޫֶɺ໌Δ͍߃ΛӅ͢ί ϩφάϥϑͳͲΛ༻͍ͯɺ ྸͷए͍ڊେ ͷݕग़ͳͲ͕ࢼΈΒΕ͍ͯΔʢਤʣ ɻ Ϝ ίϩφάϥϑͳ͠ ίϩφάϥϑ͋Γ βʔ ࡱ૾ (c) ࠃཱఱจ (c) University of Arizona
)3 ࡱ૾ޭʂ (+ (c) NASA (c) Wikipedia
ख๏͝ͱͷൃݟ͞Ε͍ͯΔͷಛ ࢹઢ๏ τϥϯδοτ๏ ॏྗϨϯζ๏ ࡱ૾ "6 .K (c) exoplanet.org
http://sasakitakanori.com