Kepler-47: Perbedaan antara revisi

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<span data-segmentid="480" class="cx-segment">Planet yang paling baru ditemukan dalam sistem, Kepler-47d, diumumkan sebagai ditemukan oleh astronom Jerome Orosz dan rekan-rekannya di [[Universitas Negeri San Diego|San Diego State University]] pada November 2013. <ref name="3rd3"><cite class="citation web">[http://nexsci.caltech.edu/conferences/KeplerII/abstracts_talks/Orosz.pdf "The Confirmation of a Third Planet in the Kepler-47 Circumbinary System"] <span class="cs1-format">(PDF)</span>. 2013.</cite></ref> <ref name="discoveryalert4">{{Cite news|title=Discovery Alert: A Third Planet in Kepler-47 System|url=https://exoplanets.nasa.gov/news/1568/discovery-alert-a-third-planet-in-kepler-47-system/|publisher=NASA|date=17 April 2019|access-date=17 April 2019}}</ref></span> <span data-segmentid="482" class="cx-segment">Dari data transit sistem Kepler-47 dari [[Misi Kepler|teleskop luar angkasa Kepler]], tim Orosz telah memperhatikan satu sinyal transit "yatim" yang bertahan selama 4,15 jam, <ref name="discovery8"><cite class="citation journal">Orosz, Jerome A.; Welsh, William F.; Carter, Joshua A.; Fabrycky, Daniel C.; Cochran, William D.; Endl, Michael; Ford, Eric B.; Haghighipour, Nader; MacQueen, Phillip J.; Mazeh, Tsevi; Sanchis-Ojeda, Roberto; Short, Donald R.; Torres, Guillermo; Agol, Eric; Buchhave, Lars A.; Doyle, Laurance R.; Isaacson, Howard; Lissauer, Jack J.; Marcy, Geoffrey W.; Shporer, Avi; Windmiller, Gur; Barclay, Thomas; Boss, Alan P.; Clarke, Bruce D.; Fortney, Jonathan; Geary, John C.; Holman, Matthew J.; Huber, Daniel; Jenkins, Jon M.; et al. (2012). "Kepler-47: A Transiting Circumbinary Multi-Planet System". ''Science''. '''337''' (6101): 1511–4. [[arXiv]]:<span class="cs1-lock-free" title="Freely accessible">[//arxiv.org/abs/1208.5489 1208.5489]</span>. [[Bibcode]]:[[bibcode:2012Sci...337.1511O|2012Sci...337.1511O]]. [[Digital object identifier|doi]]:[[doi:10.1126/science.1228380|10.1126/science.1228380]]. [[PubMed Identifier|PMID]]&nbsp;[//www.ncbi.nlm.nih.gov/pubmed/22933522 22933522].</cite></ref> <ref name="predicting"><cite class="citation journal">Hinse, Tobias C. (15 January 2015). [https://iopscience.iop.org/article/10.1088/0004-637X/799/1/88/meta "Predicting a third planet in the Kepler-47 circumbinary system"]. ''The Astrophysical Journal''. [[arXiv]]:<span class="cs1-lock-free" title="Freely accessible">[//arxiv.org/abs/1409.1349 1409.1349]</span>. [[Digital object identifier|doi]]:[[doi:10.1088/0004-637X/799/1/88|10.1088/0004-637X/799/1/88]]<span class="reference-accessdate">. Retrieved <span class="nowrap">18 April</span> 2019</span>.</cite></ref> dan tidak dikaitkan dengan dua planet yang sebelumnya dikenal. <ref name="discoveryalert4" /> <ref name="3rd3" /></span> <span data-segmentid="484" class="cx-segment">Karena lemahnya sinyal transit Kepler-47d, itu tidak terdeteksi sebelumnya pada 2012. <ref name="discoveryalert4" /> <ref name="thirdtransiting3"><cite class="citation journal">Orosz, Jerome A.; Welsh, William F.; Haghighipour, Nader; Quarles, Billy; Short, Donald R.; Mills, Sean M.; Sutyal, Suman; Torres, Guillermo; Agol, Eric; Fabrycky, Daniel C. (16 April 2019). [https://iopscience.iop.org/article/10.3847/1538-3881/ab0ca0 "Discovery of a Third Transiting Planet in the Kepler-47 Circumbinary System"]. ''The Astronomical Journal''. '''157''' (5): 174. [[arXiv]]:<span class="cs1-lock-free" title="Freely accessible">[//arxiv.org/abs/1904.07255 1904.07255]</span>. [[Digital object identifier|doi]]:[[doi:10.3847/1538-3881/ab0ca0|10.3847/1538-3881/ab0ca0]]<span class="reference-accessdate">. Retrieved <span class="nowrap">16 April</span> 2019</span>.</cite></ref></span> <span data-segmentid="485" class="cx-segment">Hanya satu transit Kepler-47d yang terlihat telah terdeteksi, <ref name="predicting" /> sehingga diperlukan transit tambahan untuk mengkonfirmasi keberadaannya. <ref name="fillout2"><cite class="citation web">[http://www.ifa.hawaii.edu/info/press-releases/Kepler47d/ "Scientists Fill Out A Circumbinary Planetary System"]. Institute For Astronomy. 16 April 2019.</cite></ref></span> <span data-segmentid="486" class="cx-segment">Dari model dinamis, orbit Kepler-47D terbukti [[presesi]] dari waktu ke waktu, sehingga dalam waktu empat tahun tanpa transit dari Kepler-47D. <ref name="discovery8" /> <ref name="3rd3" /></span> <span data-segmentid="488" class="cx-segment">Studi selanjutnya tentang sistem Kepler-47 mengarah ke konfirmasi Kepler-47d, yang diumumkan pada April 2019. <ref name="fillout2" /></span> <span data-segmentid="489" class="cx-segment">Penemuan Kepler-47d tidak terduga untuk tim Orosz, karena mereka berharap menemukan planet tambahan dengan orbit yang lebih jauh. <ref name="discoveryalert4" /> <ref name="MikeWall20192">{{Cite web|url=https://www.space.com/third-alien-planet-in-tatooine-system-kepler-47.html|title=Discovery! 3rd Planet Found in Two-Star 'Tatooine' Star System|last=Wall|first=Mike|date=16 April 2019|publisher=Space.com|access-date=16 April 2019}}</ref></span> <span data-segmentid="490" class="cx-segment">Kepler-47d adalah planet terbesar dari sistem Kepler-47, setidaknya 7 kali ukuran Bumi. <ref name="thirdtransiting3" /> <ref name="MikeWall20192" /></span> <span data-segmentid="491" class="cx-segment">Itu mengorbit antara planet-planet Kepler-47b dan c pada jarak sekitar 0,7 AU, <ref name="NASA5"><cite class="citation news">[http://www.nasa.gov/mission_pages/kepler/news/kepler-47.html "NASA's Kepler Discovers Multiple Planets Orbiting a Pair of Stars"]. ''exoplanets.nasa.gov''. [[NASA]]. 28 August 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">2 September</span> 2012</span>. <q>Kepler mission has discovered multiple transiting planets orbiting two suns for the first time</q></cite></ref> menyelesaikan orbit setiap 187,35 hari. <ref name="exoplanet.eu-K47d">{{cite web|url=http://exoplanet.eu/catalog/kepler-47_(ab)_d/|title=Planet Kepler-47 (AB) d|date=17 April 2019|website=exoplanet.eu|accessdate=18 April 2019}}</ref></span> <span data-segmentid="492" class="cx-segment">Suhu keseimbangannya sekitar {{Convert|50|F|C|abbr=on|order=flip}}. <ref name="discoveryalert4" /></span>