2MASS J03480772−6022270

**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[1]
赤緯	–60° 22′ 27.062″[1]
視星等（V）
特性
光谱分类	T7[2]
视星等 (J)	15.318 ± 0.050[1]
视星等 (H)	15.559 ± 0.143[1]
视星等 (K)	15.602 ± 0.230[1]
天体测定
徑向速度 (Rv)	−14.1 ± 3.7[2] km/s
自行 (μ)	赤经：–279.7 ± 0.6[3] mas/yr ; 赤纬：–768.5 ± 0.7[3] mas/yr
视差 (π)	110 ± 1.8[3] mas
距离	29.7 ± 0.5 ly ; (9.1 ± 0.1 pc)
詳細資料 [2]
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[1]
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]。

In this artist's impression, the brown dwarf is depicted resembling the planet Jupiter with narrow, red atmospheric bands. The object's shape is slightly flattened at its poles due to its rapid rotation.

藝術家對具有狹窄大氣帶扁棕矮星的想像圖

2MASS J0348-6022 has an oblateness comparable to those of Solar System planets Jupiter and Saturn, which spin 10 times slower than the brown dwarf.

2MASS J0348−6022與太陽系行星木星和土星的扁率和大小比較

2MASS J0348−6022預計會出現射電極光，類似於這位藝術家想像中發射射電的 T 矮星SIMP J013656.5+093347

註釋

參考資料

. SIMBAD. Centre de données astronomiques de Strasbourg. [4 March 2021]. （原始内容存档于2023-04-17）.
Tannock, Megan E.; Metchev, Stanimir; Heinze, Aren; Miles-Páez, Paulo A.; Gagné, Jonathan; Burgasser, Adam; et al. . The Astronomical Journal. May 2021, 161 (5): 21. Bibcode:2021AJ....161..224T. S2CID 232105126. arXiv:2103.01990 . doi:10.3847/1538-3881/abeb67. 224.
Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; et al. . 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. . 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. . 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）, 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）, NOIRLab, 7 April 2021
Planet 2MASS J0348-6022 （页面存档备份，存于）, Extrasolar Planets Encyclopaedia

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[Simbad-1] . SIMBAD. Centre de données astronomiques de Strasbourg. [4 March 2021]. （原始内容存档于2023-04-17）.

[Tannock2021-2] Tannock, Megan E.; Metchev, Stanimir; Heinze, Aren; Miles-Páez, Paulo A.; Gagné, Jonathan; Burgasser, Adam; et al. . 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] Kirkpatrick, J. Davy; Martin, Emily C.; Smart, Richard L.; Cayago, Alfred J.; Beichman, Charles A.; Marocco, Federico; et al. . 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. . 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. . Jet Propulsion Laboratory (NASA). 7 April 2021 [7 April 2021]. （原始内容存档于2023-04-12）.