格利澤526
格利澤526 (Lalande 25372, Wolf 498)是一顆位於牧夫座的紅矮星。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]
| 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 | |
| 參考資料庫 | |
| SIMBAD | 資料 |
  Gliese 526 格利澤526在牧夫座的位置 | |
特性
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
- ^ 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. - ^ 2.0 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 .
- ^ 3.0 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.
- ^ 4.0 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.
- ^ 5.0 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 .
- ^ 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.
- ^ 7.0 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.
- ^ 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.
- ^ HD 119850. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ 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 .
