2MASS J15074769−1627386 (也縮寫為 2MASS 1507−1627) 是位於天秤座的一顆棕矮星,距離地球約24.1光年。屬於光譜等級L5;它的表面溫度為1,300至2,000K。與其他L型棕矮星一樣,它的光譜主要由金屬氫化物和鹼金屬組成。其光譜還具有較弱的矽酸鹽吸收帶和高度變化的水吸收帶,表明具有復雜的雲霧結構。[4]

2MASS J15074769−1627386
觀測資料
曆元 J2000
星座 天秤座
星官
赤經 15h 07m 47.69s
赤緯 −16° 27′ 38.6″
視星等(V) 22.136
特性
演化阶段brown dwarf
光谱分类L5
视星等 (R)18.928+0.097
视星等 (J)12.830 ± 0.027
视星等 (H)11.895 ± 0.024
视星等 (K)11.312 ± 0.026
天体测定
徑向速度 (Rv)-39.85[1] km/s
自行 (μ) 赤经:-151.645[1] mas/yr
赤纬:-895.714[1] mas/yr
视差 (π)134.9474 ± 0.2611[2] mas
距离24.17 ± 0.05 ly
(7.41 ± 0.01 pc)
詳細資料 [3]
半徑0.08 R
表面重力 (log g)5.5
溫度1600 K
其他命名
2MASS J15074769-1627386, 2MASSW J1507476162738, 2MUCD 11296, 2MASSI J1507476−162738, Gaia DR2 6306068659857135232
參考資料庫
SIMBAD资料

這顆棕矮星被懷疑有一個軌道週期超過10年的寬軌道上的亞星伴星(行星)。[5]

參考

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  1. ^ 1.0 1.1 1.2 2MASSW J1507476-162738. SIMBAD. 斯特拉斯堡天文資料中心. 
  2. ^ Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 .  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. ^ Stephens, D. C.; Leggett, S. K.; Cushing, Michael C.; Marley, Mark S.; Saumon, D.; Geballe, T. R.; Golimowski, David A.; Fan, Xiaohui; Noll, K. S., The 0.8–14.5 μm Spectra of Mid-L to Mid-T Dwarfs: Diagnostics of Effective Temperature, Grain Sedimentation, Gas Transport, and Surface Gravity, The Astrophysical Journal, 2009, 702 (1): 154–170, Bibcode:2009ApJ...702..154S, S2CID 118650774, arXiv:0906.2991 , doi:10.1088/0004-637X/702/1/154 
  4. ^ Yang, Hao; Apai, Dániel; Marley, Mark S.; Saumon, Didier; Morley, Caroline V.; Buenzli, Esther; Artigau, Étienne; Radigan, Jacqueline; Metchev, Stanimir; Burgasser, Adam J.; Mohanty, Subhanjoy; Lowrance, Patrick J.; Showman, Adam P.; Karalidi, Theodora; Flateau, Davin; Heinze, Aren N., HST Rotational Spectral Mapping of Two L-Type Brown Dwarfs: Variability in and Out of Water Bands Indicates High-Altitude Haze Layers, The Astrophysical Journal, 2014, 798: L13, S2CID 26179429, arXiv:1411.2911 , doi:10.1088/2041-8205/798/1/L13 
  5. ^ Prato, L.; Mace, G. N.; Rice, E. L.; McLean, I. S.; Kirkpatrick, J. Davy; Burgasser, Adam J.; Kim, Sungsoo S., Radial velocity variability of field brown dwarfs, The Astrophysical Journal, 2015, 808 (1): 12, Bibcode:2015ApJ...808...12P, S2CID 26692089, arXiv:1506.02771 , doi:10.1088/0004-637X/808/1/12 

外部連結

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