格利澤526 (Lalande 25372, Wolf 498)是一顆位於牧夫座紅矮星。它的視星等為 8.5[2],因此無法用肉眼看到。該系統距離地球17.7光年(5.43秒差距)。[10]

GJ 526
觀測資料
曆元 J2000
星座 牧夫座
星官
赤經 13h 45m 43.776s[1]
赤緯 +14° 53′ 29.47″[1]
視星等(V) 8.464[2]
特性
光譜分類M1.5 V[3]
U−B 色指數+1.04[4]
B−V 色指數+1.48[4]
變星類型耀星[5]
天體測定
徑向速度 (Rv)+15.3[6] km/s
自行 (μ) 赤經:+1,776.006 mas/yr
赤緯:−1,455.156 mas/yr
視差 (π)183.9962 ± 0.0253[1] mas
距離17.726 ± 0.002 ly
(5.4349 ± 0.0007 pc)
詳細資料
質量0.28[5] M
半徑0.582+0.021
[2] R
表面重力 (log g)4.80[3]
亮度0.011[7] L
溫度3,474±50[2] K
金屬量 [Fe/H]–0.086[2] dex
自轉52.3±1.7 d[8]
自轉速度 (v sin i)1.00[2] km/s
其他命名
BD+15°2620、​CD+15° 2620、​HD 119850、​HIP 67155、​SAO 100695、​LAL 25372、​PLX 3135、​Wolf 498、​TYC 899-789-1[9]
參考資料庫
SIMBAD資料
Gliese 526 is located in the constellation Boötes
Gliese 526 is located in the constellation Boötes

Gliese 526
格利澤526在牧夫座的位置

特性

編輯

格利澤526是一顆耀星,這意味着它的亮度偶爾會增加1-6個星等。[5]它是一顆位於主序星階段的紅矮星,恆星分類為M1.5V。[3]格利澤526比太陽小,質量為太陽的28%[5],半徑為太陽的58.2%。[2]它的光度僅為太陽的1.1%[7]。其恆星溫度為3,474K[2]

格利澤526已經過紅外輻射檢查。如果紅外線存在過量可以被視為碎片盤圍繞恆星運行的跡象。然而,在格利澤526周圍並沒有發現這樣的超量[7]

參考資料

編輯
  1. ^ 1.0 1.1 1.2 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 .  已忽略未知參數|collaboration= (幫助) (勘誤: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Houdebine, E. R., Observation and modelling of main-sequence star chromospheres - XVI. Rotation of dK5 stars, Monthly Notices of the Royal Astronomical Society, September 2011, 407 (3): 1657–1673, Bibcode:2011MNRAS.416.2233H, doi:10.1111/j.1365-2966.2011.19199.x . 
  3. ^ 3.0 3.1 3.2 Frasca, A.; et al, REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters, Astronomy and Astrophysics, December 2009, 508 (3): 1313–1330, Bibcode:2009A&A...508.1313F, S2CID 118361131, arXiv:0911.0760 , doi:10.1051/0004-6361/200913327. 
  4. ^ 4.0 4.1 Cowley, A. P.; Hiltner, W. A.; Witt, A. N., Spectral classification and photometry of high proper motion stars, Astronomical Journal, December 1967, 72: 1334–1340, Bibcode:1967AJ.....72.1334C, doi:10.1086/110413. 
  5. ^ 5.0 5.1 5.2 5.3 Gershberg, R. E.; et al, Catalogue and bibliography of the UV Cet-type flare stars and related objects in the solar vicinity, Astronomy and Astrophysics Supplement, November 1999, 139 (3): 555–558, Bibcode:1999A&AS..139..555G, doi:10.1051/aas:1999407 . 
  6. ^ Evans, D. S., The Revision of the General Catalogue of Radial Velocities, Batten, Alan Henry; Heard, John Frederick (編), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 30, University of Toronto: International Astronomical Union: 57, June 20–24, 1966, Bibcode:1967IAUS...30...57E. 
  7. ^ 7.0 7.1 7.2 Avenhaus, H.; et al, The nearby population of M-dwarfs with WISE: a search for warm circumstellar dust, Astronomy & Astrophysics, December 2012, 548: A105, Bibcode:2012A&A...548A.105A, S2CID 56397054, arXiv:1209.0678 , doi:10.1051/0004-6361/201219783. 
  8. ^ Suárez Mascareño, A.; et al, Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators, Monthly Notices of the Royal Astronomical Society, September 2015, 452 (3): 2745–2756, Bibcode:2015MNRAS.452.2745S, S2CID 119181646, arXiv:1506.08039 , doi:10.1093/mnras/stv1441. 
  9. ^ HD 119850. SIMBAD. 斯特拉斯堡天文資料中心. 
  10. ^ Gatewood, George. Astrometric Studies of Aldebaran, Arcturus, Vega, the Hyades, and Other Regions. The Astronomical Journal. 2008, 136 (1): 452–460. Bibcode:2008AJ....136..452G. doi:10.1088/0004-6256/136/1/452 . 

註釋

編輯