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{{Planetbox begin
| name = WASP-121b
}}
{{Planetbox image
| image = WASP-121b 01.jpg
| caption = WASP-121b與母恆星想像圖
}}
{{Planetbox star
| star = [[WASP-121]]
| constell = [[船尾座]]<ref name="Constellation" />
| perihelion =
| average distance =
| aphelion =
| Moons:
| RA = {{RA|07|10|24.0}}<ref name="EP-2015" />
| DEC = {{DEC|-39|05|51}}<ref name="EP-2015" />
| app_mag = 10.4<ref name="EP-2015" /><ref name="WASP-2017" />
| dist_ly = 880<ref name="SP-20170803">{{cite web |last=Pultarova |first=Tereza |title=Hubble Telescope Detects Stratosphere on Huge Alien Planet |url=https://www.space.com/37705-exoplanet-stratosphere-detected-wasp-121b.html |date=3 August 2017 |work=[[space.com]] |accessdate=3 August 2017 |archive-date=2019-04-24 |archive-url=https://web.archive.org/web/20190424082752/https://www.space.com/37705-exoplanet-stratosphere-detected-wasp-121b.html |dead-url=no }}</ref><ref name="NASA-20170802" />
| dist_pc = 270<ref name="EP-2015" />
| class = F6V<ref name="EP-2015" /><ref name="WASP-2017">{{cite web |author=Staff |title=WASP Planets |url=https://wasp-planets.net/wasp-planets/ |date=2017 |work=wasp-planets.net |accessdate=3 August 2017 |archive-date=2019-04-18 |archive-url=https://web.archive.org/web/20190418060828/https://wasp-planets.net/wasp-planets/ |dead-url=no }}</ref>
| mass = 1.353<ref name="EP-2015" />
| radius = 1.458<ref name="EP-2015" />
| temperature = 6460.0<ref name="EP-2015" />
| metallicity = 0.13<ref name="EP-2015" />
| type =
| planet = hot Jupiter planet<ref name="NASA-20170802" />
}}
{{Planetbox orbit
| semimajor = 0.02544<ref name="EP-2015" />
| semimajor_gm =
| semimajor_mas =
| periastron =
| periastron_gm =
| apastron =
| apastron_gm =
| period = 1.275<ref name="EP-2015" />
| period_hour =
| eccentricity = 0.0<ref name="EP-2015" />
| inclination = 87.6<ref name="EP-2015" />
| arg_peri =
| t_transit =
}}
{{Planetbox character
| mass = 1.184<ref name="EP-2015" /><ref name="WASP-2017" />
| radius = 1.81<ref name="WASP-2017" />
| density =
| gravity_earth =
| temperature =
}}
{{Planetbox discovery
| discovery_date = 2015<ref name="EP-2015">{{cite web |author=Staff |title=Planet WASP-121 b |url=https://exoplanet.eu/catalog/wasp_121_b--2410/ |date=2015 |work=exoplanet.eu |accessdate=3 August 2017 |archive-date=2025-02-20 |archive-url=https://web.archive.org/web/20250220171628/https://exoplanet.eu/catalog/wasp_121_b--2410/ |dead-url=no }}</ref>
| discoverers =
| discovery_site =
| discovery_method = 凌日法<ref name="EP-2015" />
| detection_methods = 徑向速度法<ref name="EP-2015" />
| discovery_status= 已發表論文
}}
{{Planetbox reference
| star = WASP-121
| planet = b
}}
{{Planetbox end}}

'''WASP-121b'''是一顆環繞恆星[[WASP-121]]的[[太陽系外行星]]<ref name="NASA-20170802">{{cite web |last1=Landau |first1=Elizabeth |last2=Villard |first2=Ray |title=Hubble Detects Exoplanet with Glowing Water Atmosphere |url=https://www.jpl.nasa.gov/news/news.php?feature=6909 |date=2 August 2017 |work=[[美国国家航空航天局|NASA]] |accessdate=2 August 2017 |archive-date=2019-05-10 |archive-url=https://web.archive.org/web/20190510010257/https://www.jpl.nasa.gov/news/news.php?feature=6909 |dead-url=no }}</ref><ref name="NAT-20170802">{{cite journal |author=Evans, Thomas M. et al. |title=An ultrahot gas-giant exoplanet with a stratosphere |url=http://www.nature.com/nature/journal/v548/n7665/full/nature23266.html |date=2 August 2017 |journal=[[自然_(期刊)|Nature (journal)]] |volume=548 |pages=58-61 |doi=10.1038/nature23266 |accessdate=2 August 2017 |archive-date=2019-12-07 |archive-url=https://web.archive.org/web/20191207210001/http://www.nature.com/nature/journal/v548/n7665/full/nature23266.html |dead-url=no }}</ref>，亦是首顆發現[[平流層]]（[[大氣層]]中溫度隨高度上升的氣層）以及大氣當中含有[[水|水份]]的系外行星<ref name="NASA-20170802" /><ref name="NAT-20170802" />。WASP-121b在天球上位於[[船尾座]]<ref name="Constellation">{{cite web |author=Staff |title=Finding the constellation which contains given sky coordinates |url=http://djm.cc/constellation.html |date= |work=djm.cc |accessdate=3 August 2017 |archive-date=2019-08-15 |archive-url=https://web.archive.org/web/20190815143107/http://djm.cc/constellation.html |dead-url=no }}</ref>，距離地球約880光年<ref name="SP-20170803" /><ref name="NASA-20170802" />。

== 概要 ==
[[File:PIA22565-Exoplanet-WASP121b-ComputerSimViews-20180809.jpg|thumb|center|400px|電腦模擬WASP-121b觀測圖像（2018年8月）]]
WASP-121b是質量為木星1.18倍的[[熱木星]]，半徑則為木星的1.81倍<ref name="WASP-2017" /><ref name="NASA-20170802" />，它環繞母恆星[[WASP-121]]的軌道週期為1.27日<ref name="WASP-2017" /><ref name="NASA-20170802" />。WASP-121b的大氣層至少由三層組成，上層由[[氫]]組成，中層含[[鈉]]，下層含[[鐵]]<ref>{{cite journal |journal=Nature |author=Julia V. Seidel, Bibiana Prinoth, Lorenzo Pino, Leonardo A. dos Santos, Hritam Chakraborty, Vivien Parmentier, Elyar Sedaghati, Joost P. Wardenier, Casper Farret Jentink, Maria Rosa Zapatero Osorio, Romain Allart, David Ehrenreich, Monika Lendl, Giulia Roccetti, Yuri Damasceno, Vincent Bourrier, Jorge Lillo-Box, H. Jens Hoeijmakers, Enric Pallé, Nuno Santos, Alejandro Suárez Mascareño, Sergio G. Sousa, Hugo M. Tabernero & Francesco A. Pepe |title=Vertical structure of an exoplanet’s atmospheric jet stream|date=2025|doi=10.1038/s41586-025-08664-1 |arxiv=2502.12261 }}</ref>，並存在[[鉻]]、[[釩]]、[[鈣]]、[[鋇]]和[[鈦]]等-{}-離子<ref>{{citation|arxiv=2106.15394|year=2021|title=An inventory of atomic species in the atmosphere of WASP-121b using UVES high-resolution spectroscopy|doi=10.1093/mnras/stab1878 |last1=Merritt |first1=Stephanie R. |last2=Gibson |first2=Neale P. |last3=Nugroho |first3=Stevanus K. |last4=De Mooij |first4=Ernst J W. |last5=Hooton |first5=Matthew J. |last6=Lothringer |first6=Joshua D. |last7=Matthews |first7=Shannon M. |last8=Mikal-Evans |first8=Thomas |last9=Nikolov |first9=Nikolay |last10=Sing |first10=David K. |last11=Watson |first11=Chris A. |journal=Monthly Notices of the Royal Astronomical Society |volume=506 |issue=3 |pages=3853–3871 }}</ref><ref>{{citation|arxiv=2210.06892|year=2022|title=Detection of barium in the atmospheres of the ultra-hot gas giants WASP-76b and WASP-121b|doi=10.1051/0004-6361/202244489 |last1=Azevedo Silva |first1=T. |last2=Demangeon |first2=O. D. S. |last3=Santos |first3=N. C. |last4=Allart |first4=R. |last5=Borsa |first5=F. |last6=Cristo |first6=E. |last7=Esparza-Borges |first7=E. |last8=Seidel |first8=J. V. |last9=Palle |first9=E. |last10=Sousa |first10=S. G. |last11=Tabernero |first11=H. M. |last12=Zapatero Osorio |first12=M. R. |last13=Cristiani |first13=S. |last14=Pepe |first14=F. |last15=Rebolo |first15=R. |last16=Adibekyan |first16=V. |last17=Alibert |first17=Y. |last18=Barros |first18=S. C. C. |last19=Bouchy |first19=F. |last20=Bourrier |first20=V. |last21=Lo Curto |first21=G. |last22=Di Marcantonio |first22=P. |last23=d'Odorico |first23=V. |last24=Ehrenreich |first24=D. |last25=Figueira |first25=P. |last26=González Hernández |first26=J. I. |last27=Lovis |first27=C. |last28=Martins |first28=C. J. A. P. |last29=Mehner |first29=A. |last30=Micela |first30=G. |journal=Astronomy & Astrophysics |volume=666 |pages=L10 |s2cid=252873126 |display-authors=1 }}</ref><ref>{{cite journal |journal= Astronomy & Astrophysics |title=Titanium chemistry of WASP-121 b with ESPRESSO in 4-UT mode |volume =694|date= February 2025 |doi=10.1051/0004-6361/202452405 |author=B. Prinoth, J.V. Seidel, H.J. Hoeijmakers, B.M. Morris, M. Baratella, N.W. Borsato, Y.C. Damasceno, V. Parmentier, D. Kitzmann, E. Sedaghati, L. Pino, F. Borsa, R. Allart, N. Santos, M. Steiner, A. Suárez Mascareño, H. Tabernero, M.R. Zapatero Osorio |arxiv=2502.12262 }}</ref>。

== 參見 ==
* [[超廣角尋找行星]]（SuperWASP）
* [[HD 15082|WASP-33b]]

== 參考資料 ==
{{reflist}}

== 外部連結 ==
* [http://wasp-planets.net/wasp-planets/ SuperWASP Wide Angle Search for Planets: The Planets]{{Wayback|url=http://wasp-planets.net/wasp-planets/ |date=20160205102307 }}, [[SuperWASP]].
{{Sky|07|10|24.0|-|39|05|51|900}}

{{2015年太空活動}}
{{portal bar|天文学|太空}}

[[Category:2015年發現的系外行星]]
[[Category:熱木星]]
[[Category:船尾座]]

WASP-121b - 版本历史

imported>Cbls1911 来自 2025年3月1日 (六) 03:38