格利澤514

格利澤514，又稱BD+11 2576或HIP 65859, 是一顆位於處女座的紅矮星，距離太陽約24.87光年。^[11]

Gliese 514

觀測資料 曆元 J2000
星座	處女座
星官
赤經	13h 29m 59.7859s[1]
赤緯	10° 22′ 37.7845″[1]
視星等（V）	9.029
特性
演化階段	主序星
光譜分類	M0Ve[2]
視星等 (J)	5.902+0.018 −[3]
視星等 (H)	5.300+0.033 −[3]
天體測定
徑向速度 (Rv)	14.606[4] km/s
自行 (μ)	赤經：1,127.34+0.03 −[5] mas/yr 赤緯：−1,073.888+0.013 −[5] mas/yr
視差 (π)	131.1013 ± 0.0270[5] mas
距離	24.878 ± 0.005 ly (7.628 ± 0.002 pc)
絕對星等 (MV)	5.89[6]
詳細資料
質量	0.526[7] M☉
半徑	0.611+0.043 −[7] R☉
表面重力 (log g)	4.59[7]
亮度 (bolometric)	0.043[7] L☉
溫度	2,901[6] - 3,727[3] K
金屬量 [Fe/H]	3001300000000000000♠−0.07±0.07[3] dex
自轉	28.0+2.9 −[8]
自轉速度 (v sin i)	2.00[9] km/s
年齡	8.25[10] Gyr
其他命名
BD+11 2576、​HIP 65859、​LTT 13925、​Ross 490、​TYC 895-317-1、​2MASS J13295979+1022376, Gaia EDR3 3738099879558957952[1]
參考資料庫
SIMBAD	資料

格利澤514的金屬量Fe/H指數在很大程度上是未知的，數據的中值為-0.4至+0.18。這種差異是由於Gliese 514的恆星光譜的特殊性造成的。光譜的特殊性也會影響恆星溫度測量的準確性，^[9] 數值可低至2901 K。^[6]格利澤514的光譜顯示出發射線^[2]，但恆星本身的星斑活動很低。^[12]

截至2020年，並沒有發現任何恆星伴星。^[13]

目前計算太陽正穿過格利澤 514的奧爾特雲尾部。因此，未來穿越太陽系的星際天體可能源自格利澤 514。^[14]

行星系統

自2019年以來，人們懷疑在格利澤 514周圍存在一個以軌道周期為15天運行的行星。^[15] 但是，該行星尚未得到證實。相反，在2022年，一顆名為格利澤 514 b的超級地球行星通過視向速度法在偏心140天的軌道上被發現。行星軌道部分位於母星宜居帶內，行星平衡溫度沿軌道平均為202 K。^[8]

恆星的紅外過量也表明系統中可能存在岩屑盤。^[16]

Gliese 514的行星系^[8]

成員 (依恆星距離)	質量	半長軸 (AU)	軌道周期 (天)	離心率	傾角	半徑
b	>5.2+0.9 − M⊕	0.422+0.014 −0.015	140.43+0.41 −	0.45+0.15 −0.14	—	—

參考

1. BD+11 2576. SIMBAD. 斯特拉斯堡天文資料中心.
2. Lindegren, Lennart; Dravins, Dainis, Astrometric radial velocities for nearby stars, Astronomy & Astrophysics, 2021, 652: A45, Bibcode:2021A&A...652A..45L, S2CID 234778154, arXiv:2105.09014 , doi:10.1051/0004-6361/202141344
3. Lindgren, Sara; Heiter, Ulrike, Metallicity determination of M dwarfs, Astronomy & Astrophysics, 2017, 604: A97, Bibcode:2017A&A...604A..97L, S2CID 119216828, arXiv:1705.08785 , doi:10.1051/0004-6361/201730715
4. Manara, C. F.; et al, PENELLOPE: The ESO data legacy program to complement the Hubble UV Legacy Library of Young Stars (ULLYSES), Astronomy & Astrophysics, 2021, 650: A196, S2CID 232320330, arXiv:2103.12446 , doi:10.1051/0004-6361/202140639
5. 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.
6. Ghosh, Samrat; Ghosh, Supriyo; Das, Ramkrishna; Mondal, Soumen; Khata, Dhrimadri, Understanding the physical properties of young M dwarfs: NIR spectroscopic studies, Monthly Notices of the Royal Astronomical Society, 2020, 493 (3): 4533–4550, arXiv:2002.05762 , doi:10.1093/mnras/staa427
7. Berger, D. H.; Gies, D. R.; McAlister, H. A.; Brummelaar, T. A. ten; Henry, T. J.; Sturmann, J.; Sturmann, L.; Turner, N. H.; Ridgway, S. T.; Aufdenberg, J. P.; Merand, A., First Results from the CHARA Array. IV. The Interferometric Radii of Low‐Mass Stars, The Astrophysical Journal, 2006, 644 (1): 475–483, Bibcode:2006ApJ...644..475B, S2CID 14966363, arXiv:astro-ph/0602105 , doi:10.1086/503318
8. Damasso, M.; et al, A quarter century of spectroscopic monitoring of the nearby M dwarf Gl 514, Astronomy & Astrophysics, 2022, 666: A187, S2CID 248157318, arXiv:2204.06376 , doi:10.1051/0004-6361/202243522
9. Olander, T.; Heiter, U.; Kochukhov, O., Comparative high-resolution spectroscopy of M dwarfs: Exploring non-LTE effects, Astronomy & Astrophysics, 2021, 649: A103, Bibcode:2021A&A...649A.103O, S2CID 231942628, arXiv:2102.08836 , doi:10.1051/0004-6361/202039747
10. Maldonado, J.; Micela, G.; Baratella, M.; d'Orazi, V.; Affer, L.; Biazzo, K.; Lanza, A. F.; Maggio, A.; González Hernández, J. I.; Perger, M.; Pinamonti, M.; Scandariato, G.; Sozzetti, A.; Locci, D.; Di Maio, C.; Bignamini, A.; Claudi, R.; Molinari, E.; Rebolo, R.; Ribas, I.; Toledo-Padrón, B.; Covino, E.; Desidera, S.; Herrero, E.; Morales, J. C.; Suárez-Mascareño, A.; Pagano, I.; Petralia, A.; Piotto, G.; Poretti, E. HADES RV programme with HARPS-N at TNG. XII. The abundance signature of M dwarf stars with planets. Astronomy and Astrophysics. 2020, 644: A68. Bibcode:2020A&A...644A..68M. S2CID 225094682. arXiv:2010.14867 . doi:10.1051/0004-6361/202039478.
11. Determinations of the parallaxes of BD +11 2576 and BD +18 683. [2023-03-24]. （原始內容存檔於2023-03-07）.
12. Reiners, A., The narrowest M-dwarf line profiles and the rotation-activity connection at very slow rotation, Astronomy and Astrophysics, 2007, 467 (1): 259, Bibcode:2007A&A...467..259R, S2CID 8672566, arXiv:astro-ph/0702634 , doi:10.1051/0004-6361:20066991
13. Lamman, Claire; Baranec, Christoph; Berta-Thompson, Zachory K.; Law, Nicholas M.; Schonhut-Stasik, Jessica; Ziegler, Carl; Salama, Maïssa; Jensen-Clem, Rebecca; Duev, Dmitry A.; Riddle, Reed; Kulkarni, Shrinivas R.; Winters, Jennifer G.; Irwin, Jonathan M., Robo-AO M-dwarf Multiplicity Survey: Catalog, The Astronomical Journal, 2020, 159 (4): 139, Bibcode:2020AJ....159..139L, S2CID 210718832, arXiv:2001.05988 , doi:10.3847/1538-3881/ab6ef1
14. Portegies Zwart, S., Oort cloud Ecology, Astronomy & Astrophysics, 2021, 647: A136, S2CID 226976082, arXiv:2011.08257 , doi:10.1051/0004-6361/202038888
15. Barnes, J. R.; et al. Frequency of planets orbiting M dwarfs in the Solar neighbourhood. 2019-06-11. arXiv:1906.04644  [astro-ph.EP] （英語）.
16. Tanner, Angelle; Plavchan, Peter; Bryden, Geoff; Kennedy, Grant; Matrá, Luca; Cronin-Coltsmann, Patrick; Lowrance, Patrick; Henry, Todd; Riaz, Basmah; Gizis, John E.; Riedel, Adric; Choquet, Elodie, Herschel Observations of Disks around Late-type Stars, Publications of the Astronomical Society of the Pacific, 2020, 132 (1014): 084401, Bibcode:2020PASP..132h4401T, S2CID 216553868, arXiv:2004.12597 , doi:10.1088/1538-3873/ab895f