imported>Yumeto：Cat-a-lot：分类间移动：从Category:G-型主序星到Category:G型主序星 using Cat-a-lot

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Cat-a-lot：分类间移动：从Category:G-型主序星到Category:G型主序星 using Cat-a-lot

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{{roughtranslation|time=2020-05-17T06:41:14+00:00}}

{{Starbox begin}}
{{Starbox observe
| epoch = J2000
| constell = [[天兔座]]
| ra = {{RA|06|04|21.47346}}<ref name=DR2>{{cite DR2|2991284369063612928}}</ref>
| dec = {{DEC|-16|57|55.1088}}<ref name=DR2/>
| appmag_v = 11.35<ref name=TYC2>{{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author1=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}}</ref>
}}
{{Starbox character
| class = G6V<ref name=wyttenbach2018/>
}}
{{Starbox astrometry
| radial_v = 41.25<ref name=DR2/>
| prop_mo_ra = 54.769<ref name=DR2/>
| prop_mo_dec = -19.061<ref name=DR2/>
| parallax = 5.1113
| p_error = 0.0314
| parallax_footnote = <ref name=DR2/>
}}
{{Starbox detail
| mass = 0.72<ref name=oza2019/>
| radius = 1.038<ref name=wyttenbach2018/>
| temperature = 5,600<ref name=oza2019/>
| luminosity = 0.884<ref name=DR2/>
| gravity = 4.5<ref name=wyttenbach2018/>
| rotation =
| age_gyr = 5.00<ref name=oza2019/>
}}
{{Starbox catalog
| names = {{odlist|TYC = 5936-2086-1|WDS= J06044-1658A | 2MASS = J06042146-1657550}}<ref name=SIMBAD>{{cite simbad|title=WASP-49|accessdate=2019-08-29}}</ref>
}}
{{Starbox reference
| Simbad = WASP-49
}}
{{Starbox end}}
{{Infobox planet
| extrasolarplanet = yes
| name = WASP-49b
| image = 
| image_size = 
| image_alt =
| caption =
| apsis = astron
| discovery_ref = <ref>{{cite web |url=http://exoplanet.eu/catalog/wasp-49_b |title=European exoplanet catalog |accessdate=2019-08-29 |archive-date=2019-12-02 |archive-url=https://web.archive.org/web/20191202030259/http://exoplanet.eu/catalog/wasp-49_b/ }}</ref>
| discoverer = 莫妮卡·倫德爾等人
| discovery_site =
| discovered = 2011
| discovery_method = 主星凌
| alt_names = 
| periastron =
| apoastron =
| semimajor = 0.0379±0.011 AU
| avg_speed = 
| eccentricity =
| period = 2.7817387 day
| inclination = 84.89±0.19 deg
| angular_dist =
| long_periastron = 
| time_periastron = 
| semi-amplitude =
| mean_radius = {{Jupiter radius|{{val|1.115|0.047|-0.047}}}}
| surface_area =
| volume =
| density =
| mass = {{Jupiter mass|{{val|0.378|0.027|-0.027}}}}
| surface_grav = 
| moment_of_inertia_factor =
| escape_velocity =
| albedo =
| single_temperature =
}}

'''WASP-49'''是一顆在主序帶的[[黃矮星]]，表面溫度是5,600K。WASP-49 缺乏重元素，相對於太陽的[[金屬量]]Fe/H指數為 -0.23，這意味著它含有的鐵是太陽的59%。

== 行星系統 ==
在2011年，發現它有一顆行星，命名為WASP-49b。在2017年，發現它有一個廣泛的[[鈉]]包層<ref name=wyttenbach2018>{{cite journal|arxiv=1702.00448|doi=10.1051/0004-6361/201630063|title=Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS)|journal=Astronomy & Astrophysics|volume=602|pages=A36|year=2017|last1=Wyttenbach|first1=A.|last2=Lovis|first2=C.|last3=Ehrenreich|first3=D.|last4=Bourrier|first4=V.|last5=Pino|first5=L.|last6=Allart|first6=R.|last7=Astudillo-Defru|first7=N.|last8=Cegla|first8=H. M.|last9=Heng|first9=K.|last10=Lavie|first10=B.|last11=Melo|first11=C.|last12=Murgas|first12=F.|last13=Santerne|first13=A.|last14=Ségransan|first14=D.|last15=Udry|first15=S.|last16=Pepe|first16=F.}}</ref>。在2019年，一項使用[[哈伯太空望遠鏡]]的[[紫外線|近紫外線]]數據的研究，發現包括[[鎂]]和[[鐵]]等金屬引起的明顯吸收特徵。鎂和鐵不是因為[[引力]]被行星拘束住，而可能是被行星的[[磁|磁性]]束縛著<ref>{{Cite journal|last=Sing|first=David K.|last2=Lavvas|first2=Panayotis|last3=Ballester|first3=Gilda E.|last4=Etangs|first4=Alain Lecavelier des|last5=Marley|first5=Mark S.|last6=Nikolov|first6=Nikolay|last7=Ben-Jaffel|first7=Lotfi|last8=Bourrier|first8=Vincent|last9=Buchhave|first9=Lars A.|last10=Deming|first10=Drake L.|last11=Ehrenreich|first11=David|display-authors=etal|date=2019-08-01|title=The HST PanCET Program: Exospheric Mg II and Fe II in the Near-UV transmission spectrum of WASP-121b using Jitter Decorrelation|journal=The Astronomical Journal|volume=158|issue=2|pages=91|doi=10.3847/1538-3881/ab2986|arxiv=1908.00619|issn=1538-3881|hdl=10150/634666|hdl-access=free}}</ref><ref>{{Cite web|url=http://hubblesite.org/contents/news-releases/2019/news-2019-19|title=Hubble Uncovers a 'Heavy Metal' Exoplanet Shaped Like a Football|website=HubbleSite.org|language=en|access-date=2020-01-01|archive-date=2021-11-09|archive-url=https://web.archive.org/web/20211109225919/https://hubblesite.org/contents/news-releases/2019/news-2019-19}}</ref>。WASP-49b周圍的鈉包層可能來自類似[[木衛一|埃歐]]的[[系外衛星]] <ref name=oza2019>{{Cite journal|last=Oza|first=Apurva V.|last2=Johnson|first2=Robert E.|last3=Lellouch|first3=Emmanuel|last4=Schmidt|first4=Carl|last5=Schneider|first5=Nick|last6=Huang|first6=Chenliang|last7=Gamborino|first7=Diana|last8=Gebek|first8=Andrea|last9=Wyttenbach|first9=Aurelien|last10=Demory|first10=Brice-Olivier|last11=Mordasini|first11=Christoph|first12=Prabal|last12=Saxena|first13=David |last13=Dubois|first14=Arielle |last14=Moullet|first15=Nicolas |last15=Thomas|date=2019-08-28|title=Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets|arxiv=1908.10732 |bibcode=2019ApJ...885..168O |doi=10.3847/1538-4357/ab40cc |journal=[[The Astrophysical Journal]]|volume=885|issue=2|pages=168}}</ref><ref>{{Cite web|url=https://www.unibe.ch/news/media_news/media_relations_e/media_releases/2019/medienmitteilungen_2019/hints_of_a_volcanically_active_exomoon/index_eng.html|title=Hints of a volcanically active exomoon|date=2019-08-29|website=Portal|access-date=2020-01-01|archive-date=2021-11-09|archive-url=https://web.archive.org/web/20211109224843/https://www.unibe.ch/news/media_news/media_relations_e/media_releases/2019/medienmitteilungen_2019/hints_of_a_volcanically_active_exomoon/index_eng.html}}</ref>。這個新想法很有趣，但也頗具投機性<ref>{{Cite web|url=https://wasp-planets.net/2019/09/02/hints-of-volcanic-exo-moons/|title=Hints of volcanic exo-moons?|last=waspplanets|date=2019-09-02|website=WASP Planets|language=en|access-date=2020-01-01|archive-date=2021-05-08|archive-url=https://web.archive.org/web/20210508130738/https://wasp-planets.net/2019/09/02/hints-of-volcanic-exo-moons/}}</ref>。

== 參考資料 ==
{{Reflist}}

{{Sky|6|4|21.462|-|16|57|55.06|470}}

{{Stars of Lepus}}

[[Category:天兔座]]
[[Category:行星凌變星]]
[[Category:G型主序星]]

WASP-49 - 版本历史

imported>Yumeto：​Cat-a-lot：分类间移动：从Category:G-型主序星到Category:G型主序星 using Cat-a-lot

imported>Yumeto：Cat-a-lot：分类间移动：从Category:G-型主序星到Category:G型主序星 using Cat-a-lot