zh 2MASS J03480772%E2%88%926022270

**2MASS J03480772−6022270**
	; 2MASS所拍攝的紅外線圖像(中)
觀測資料; 曆元 J2000
星座	網罟座
星官
赤經	03h 48m 07.721s
赤緯	–60° 22′ 27.062″
視星等（V）
特性
光谱分类	T7
视星等 (J)	15.318 ± 0.050
视星等 (H)	15.559 ± 0.143
视星等 (K)	15.602 ± 0.230
天体测定
徑向速度 (Rv)	−14.1 ± 3.7 km/s
自行 (μ)	赤经：–279.7 ± 0.6 mas/yr ; 赤纬：–768.5 ± 0.7 mas/yr
视差 (π)	110 ± 1.8 mas
距离	29.7 ± 0.5 ly ; (9.1 ± 0.1 pc)
詳細資料
質量	0.041+0.021; −0.017 M☉
半徑	0.093+0.016; −0.010 R☉
表面重力 (log g)	5.1 ± 0.3
溫度	880 ± 110 K
自轉	1.080+0.004; −0.005 h
自轉速度 (v sin i)	103.5 ± 7.4 km/s
年齡	3.5+11.5; −2.9 Gyr
其他命名
	WISE J034807.33-602234.9, WISEA J034807.33-602235.2, WISEP J034807.34-602234.9, UGCS J121951.36+312849.4, TIC 237922091
參考資料庫
SIMBAD	资料
系外行星百科	资料

2MASS J03480772−6022270 (簡寫為 2MASS J0348−6022)是一顆光譜分類為T7的棕矮星，位於網罟座，距離太陽約29光年。自轉週期為1.08小時，是截至2022年已確認的自轉最快的棕矮星^[4]。自轉速度超過100公里/秒（62英里/秒）^[5]。由於其快速旋轉，兩極略微變平，其程度與太陽系中最扁的行星土星相似。正如在其他已知的快速旋轉的棕矮星中觀察到的那樣，它的快速旋轉可能會通過其磁場中的帶電粒子相互作用產生強烈的極光射電輻射^[2]。

註釋

參考資料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 2MASS J03480772-6022270 – Brown Dwarf (M<0.08solMass). SIMBAD. Centre de données astronomiques de Strasbourg. [4 March 2021]. （原始内容存档于2023-04-17）.
^ ^2.0 ^2.1 ^2.2 ^2.3 Tannock, Megan E.; Metchev, Stanimir; Heinze, Aren; Miles-Páez, Paulo A.; Gagné, Jonathan; Burgasser, Adam; et al. Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-Cool Dwarfs. The Astronomical Journal. May 2021, 161 (5): 21. Bibcode:2021AJ....161..224T. S2CID 232105126. arXiv:2103.01990 . doi:10.3847/1538-3881/abeb67. 224.
^ ^3.0 ^3.1 ^3.2 Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; et al. Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime. The Astrophysical Journal Supplement Series. February 2019, 240 (2): 69. Bibcode:2019ApJS..240...19K. arXiv:1812.01208 . doi:10.3847/1538-4365/aaf6af . 19.
^ Vos, Johanna M.; Faherty, Jacqueline K.; Gagné, Jonathan; Marley, Mark; Metchev, Stanimir; Gizis, John; et al. Let the Great World Spin: Revealing the Stormy, Turbulent Nature of Young Giant Exoplanet Analogs with the Spitzer Space Telescope. The Astrophysical Journal. January 2022, 924 (2): 24. Bibcode:2022ApJ...924...68V. S2CID 245904001. arXiv:2201.04711 . doi:10.3847/1538-4357/ac4502. 68.
^ Cofield, Calla. Trio of Fast-Spinning Brown Dwarfs May Reveal a Rotational Speed Limit. Jet Propulsion Laboratory (NASA). 7 April 2021 [7 April 2021]. （原始内容存档于2023-04-12）.

外部連結

Western space scientists identify fastest-spinning "failed stars" ever found （页面存档备份，存于互联网档案馆）, Jeff Renaud, University of Western Ontario, 7 April 2021
Caught Speeding: Clocking the Fastest-Spinning Brown Dwarfs （页面存档备份，存于互联网档案馆）, NOIRLab, 7 April 2021
Planet 2MASS J0348-6022 （页面存档备份，存于互联网档案馆）, Extrasolar Planets Encyclopaedia

[Simbad-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 2MASS J03480772-6022270 – Brown Dwarf (M<0.08solMass). SIMBAD. Centre de données astronomiques de Strasbourg. [4 March 2021]. （原始内容存档于2023-04-17）.

[Tannock2021-2] 2.0 ^2.1 ^2.2 ^2.3 Tannock, Megan E.; Metchev, Stanimir; Heinze, Aren; Miles-Páez, Paulo A.; Gagné, Jonathan; Burgasser, Adam; et al. Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-Cool Dwarfs. The Astronomical Journal. May 2021, 161 (5): 21. Bibcode:2021AJ....161..224T. S2CID 232105126. arXiv:2103.01990 . doi:10.3847/1538-3881/abeb67. 224.

[Kirkpatrick2019-3] 3.0 ^3.1 ^3.2 Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; et al. Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime. The Astrophysical Journal Supplement Series. February 2019, 240 (2): 69. Bibcode:2019ApJS..240...19K. arXiv:1812.01208 . doi:10.3847/1538-4365/aaf6af . 19.

[Vos2022-4] Vos, Johanna M.; Faherty, Jacqueline K.; Gagné, Jonathan; Marley, Mark; Metchev, Stanimir; Gizis, John; et al. Let the Great World Spin: Revealing the Stormy, Turbulent Nature of Young Giant Exoplanet Analogs with the Spitzer Space Telescope. The Astrophysical Journal. January 2022, 924 (2): 24. Bibcode:2022ApJ...924...68V. S2CID 245904001. arXiv:2201.04711 . doi:10.3847/1538-4357/ac4502. 68.

[JPL-20210407-5] Cofield, Calla. Trio of Fast-Spinning Brown Dwarfs May Reveal a Rotational Speed Limit. Jet Propulsion Laboratory (NASA). 7 April 2021 [7 April 2021]. （原始内容存档于2023-04-12）.

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