格利澤357

**Gliese 357**
	; 藝術家想像中的格利澤357(GJ357)系統; 图片来源：Jack Madden
觀測資料; 曆元 J2000
星座	長蛇座
星官
赤經	09h 36m 01.63722s
赤緯	-21° 39′ 38.8776″
視星等（V）	10.906
特性
演化阶段	主序星
光谱分类	M2.5V
天体测定
徑向速度 (Rv)	−35.03±0.17 km/s
自行 (μ)	赤经：138.722±0.023 mas/yr ; 赤纬：−990.342±0.020 mas/yr
视差 (π)	105.9789 ± 0.0227 mas
距离	30.776 ± 0.007 ly ; (9.436 ± 0.002 pc)
绝对星等 (MV)	+11.13
詳細資料
質量	0.362 M☉
半徑	0.333 R☉
表面重力 (log g)	4.96
亮度	0.014 L☉
溫度	3,488 K
金属量 [Fe/H]	−0.14 dex
自轉	74.3±1.7 d
自轉速度 (v sin i)	2.5 km/s
其他命名
	HIP 47103、2MASS 09360161-2139371, TOI 562
參考資料庫
SIMBAD	资料

GJ 357 (全寫為 Gliese 357) 是一顆位於長蛇座^[8]的紅矮星，具有異常低的星斑活動^[9]，距離太陽系約30.7光年^[8]。

行星系統

這顆恆星有三顆已知的行星環繞^[10]，其中一顆行星格利澤357 d被認為在宜居帶內的超級地球^[11]^[8]^[12]^[13]

格利澤357的行星系^[14]
成員 (依恆星距離)	质量	半長軸 (AU)	轨道周期 (天)	離心率	傾角	半径
b	7000184000000000000♠1.84±0.31 M_⊕	6998350000000000000♠0.035±0.002	7000393072000000000♠3.93072+0.00008 −0.00006	0.047+0.059 −0.047	7001891200000000000♠89.12+0.37 −0.31°	7000121700000000000♠1.217+0.084 −0.083 R_⊕
c	7000340000000000000♠≥3.40±0.46 M_⊕	6998610000000000000♠0.061±0.004	7000912470000000000♠9.1247+0.0011 −0.0010	0.072+0.053 −	—	—
d	7000610000000000000♠≥6.1±1.0 M_⊕	6999204000000000000♠0.204±0.015	7001556610000000000♠55.661±0.055	0.033+0.057 −0.033	—	—

參考資料

^ ^1.0 ^1.1 ^1.2 ^1.3 Vallenari, A.; et al. Gaia Data Release 3. Summary of the content and survey properties. Astronomy & Astrophysics. 2022. arXiv:2208.00211 . doi:10.1051/0004-6361/202243940 . 已忽略未知参数|collaboration= (帮助) Gaia DR3 record for this source at VizieR.
^ Koen, C.; Kilkenny, D.; Van Wyk, F.; Marang, F. UBV(RI)_C JHK observations of Hipparcos-selected nearby stars. Monthly Notices of the Royal Astronomical Society. 2010, 403 (4): 1949. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x .
^ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample. The Astronomical Journal. 2006, 132 (1): 161–170. Bibcode:2006AJ....132..161G. S2CID 119476992. arXiv:astro-ph/0603770 . doi:10.1086/504637.
^ ^4.0 ^4.1 Houdebine, E. R.; Mullan, D. J.; Paletou, F.; Gebran, M.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. Rotation-Activity Correlations in K and M Dwarfs. I. Stellar Parameters and Compilations of v sin I and P/Sin I for a Large Sample of Late-K and M Dwarfs. The Astrophysical Journal. 2016, 822 (2): 97. Bibcode:2016ApJ...822...97H. S2CID 119118088. arXiv:1604.07920 . doi:10.3847/0004-637X/822/2/97.
^ ^5.0 ^5.1 ^5.2 ^5.3 ^5.4 Passegger, V. M.; Reiners, Ansgar; Jeffers, S. V.; Wende-von Berg, S.; Schöfer, P.; Caballero, J. A.; Schweitzer, A.; Amado, P. J.; Béjar, V. J. S.; Cortés-Contreras, M.; Hatzes, A. P.; Kürster, M.; Montes, D.; Pedraz, S.; Quirrenbach, A.; Ribas, I.; Seifert, W. The CARMENES search for exoplanets around M dwarfs. Photospheric parameters of target stars from high-resolution spectroscopy. Astronomy and Astrophysics. 2018, 615: A6. Bibcode:2018A&A...615A...6P. S2CID 55639432. arXiv:1802.02946 . doi:10.1051/0004-6361/201732312.
^ Morales, J. C.; Ribas, I.; Jordi, C.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. The effect of activity on stellar temperatures and radii. Astronomy and Astrophysics. 2008, 478 (2): 507. Bibcode:2008A&A...478..507M. S2CID 16238033. arXiv:0711.3523 . doi:10.1051/0004-6361:20078324.
^ Suárez Mascareño, A.; Rebolo, R.; González Hernández, J. I.; Esposito, M., Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators, Monthly Notices of the Royal Astronomical Society, 2015, 452 (3): 2745–2756, Bibcode:2015MNRAS.452.2745S, arXiv:1506.08039 , doi:10.1093/mnras/stv1441
^ ^8.0 ^8.1 ^8.2 Reddy, Francis; Center, NASA’s Goddard Space Flight. TESS Discovers Habitable Zone Planet in GJ 357 System. SciTechDaily. 2019-07-31 [2019-08-01]. （原始内容存档于2019-08-01）（美国英语）.
^ Modirrousta-Galian, D.; Stelzer, B.; Magaudda, E.; Maldonado, J.; Güdel, M.; Sanz-Forcada, J.; Edwards, B.; Micela, G., A Super-Earth Orbiting an Extremely Inactive Host Star, Astronomy & Astrophysics, 2020, A113: 641, S2CID 220647396, arXiv:2007.10262 , doi:10.1051/0004-6361/202038280
^ The Extrasolar Planet Encyclopaedia — Gj 357 b. exoplanet.eu. [2019-08-01]. （原始内容存档于2022-01-20）.
^ Falconer, Rebecca, Newly uncovered super-Earth 31 light-years away may be habitable （页面存档备份，存于互联网档案馆）, Axios, August 1, 2019
^ Potentially habitable 'super-Earth' discovered just 31 light-years away. NBC News. [2019-08-01]. （原始内容存档于2019-07-31）（英语）.
^ Garner, Rob. NASA's TESS Helps Find Intriguing New World. NASA. 2019-07-30 [2019-08-01]. （原始内容存档于2019-08-01）.
^ Luque, R.; Pallé, E.; et al. Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization. Astronomy & Astrophysics. August 2019, 628: A39. Bibcode:2019A&A...628A..39L. S2CID 139102184. arXiv:1904.12818 . doi:10.1051/0004-6361/201935801.

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[GaiaDR3-1] 1.0 ^1.1 ^1.2 ^1.3 Vallenari, A.; et al. Gaia Data Release 3. Summary of the content and survey properties. Astronomy & Astrophysics. 2022. arXiv:2208.00211 . doi:10.1051/0004-6361/202243940 . 已忽略未知参数|collaboration= (帮助) Gaia DR3 record for this source at VizieR.

[ubv-2] Koen, C.; Kilkenny, D.; Van Wyk, F.; Marang, F. UBV(RI)_C JHK observations of Hipparcos-selected nearby stars. Monthly Notices of the Royal Astronomical Society. 2010, 403 (4): 1949. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x .

[nstars-3] Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample. The Astronomical Journal. 2006, 132 (1): 161–170. Bibcode:2006AJ....132..161G. S2CID 119476992. arXiv:astro-ph/0603770 . doi:10.1086/504637.

[houdebine-4] 4.0 ^4.1 Houdebine, E. R.; Mullan, D. J.; Paletou, F.; Gebran, M.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. Rotation-Activity Correlations in K and M Dwarfs. I. Stellar Parameters and Compilations of v sin I and P/Sin I for a Large Sample of Late-K and M Dwarfs. The Astrophysical Journal. 2016, 822 (2): 97. Bibcode:2016ApJ...822...97H. S2CID 119118088. arXiv:1604.07920 . doi:10.3847/0004-637X/822/2/97.

[carmenes-5] 5.0 ^5.1 ^5.2 ^5.3 ^5.4 Passegger, V. M.; Reiners, Ansgar; Jeffers, S. V.; Wende-von Berg, S.; Schöfer, P.; Caballero, J. A.; Schweitzer, A.; Amado, P. J.; Béjar, V. J. S.; Cortés-Contreras, M.; Hatzes, A. P.; Kürster, M.; Montes, D.; Pedraz, S.; Quirrenbach, A.; Ribas, I.; Seifert, W. The CARMENES search for exoplanets around M dwarfs. Photospheric parameters of target stars from high-resolution spectroscopy. Astronomy and Astrophysics. 2018, 615: A6. Bibcode:2018A&A...615A...6P. S2CID 55639432. arXiv:1802.02946 . doi:10.1051/0004-6361/201732312.

[morales-6] Morales, J. C.; Ribas, I.; Jordi, C.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. The effect of activity on stellar temperatures and radii. Astronomy and Astrophysics. 2008, 478 (2): 507. Bibcode:2008A&A...478..507M. S2CID 16238033. arXiv:0711.3523 . doi:10.1051/0004-6361:20078324.

[7] Suárez Mascareño, A.; Rebolo, R.; González Hernández, J. I.; Esposito, M., Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators, Monthly Notices of the Royal Astronomical Society, 2015, 452 (3): 2745–2756, Bibcode:2015MNRAS.452.2745S, arXiv:1506.08039 , doi:10.1093/mnras/stv1441

[:0-8] 8.0 ^8.1 ^8.2 Reddy, Francis; Center, NASA’s Goddard Space Flight. TESS Discovers Habitable Zone Planet in GJ 357 System. SciTechDaily. 2019-07-31 [2019-08-01]. （原始内容存档于2019-08-01）（美国英语）.

[9] Modirrousta-Galian, D.; Stelzer, B.; Magaudda, E.; Maldonado, J.; Güdel, M.; Sanz-Forcada, J.; Edwards, B.; Micela, G., A Super-Earth Orbiting an Extremely Inactive Host Star, Astronomy & Astrophysics, 2020, A113: 641, S2CID 220647396, arXiv:2007.10262 , doi:10.1051/0004-6361/202038280

[10] The Extrasolar Planet Encyclopaedia — Gj 357 b. exoplanet.eu. [2019-08-01]. （原始内容存档于2022-01-20）.

[11] Falconer, Rebecca, Newly uncovered super-Earth 31 light-years away may be habitable （页面存档备份，存于互联网档案馆）, Axios, August 1, 2019

[12] Potentially habitable 'super-Earth' discovered just 31 light-years away. NBC News. [2019-08-01]. （原始内容存档于2019-07-31）（英语）.

[13] Garner, Rob. NASA's TESS Helps Find Intriguing New World. NASA. 2019-07-30 [2019-08-01]. （原始内容存档于2019-08-01）.

[Luque2019-14] Luque, R.; Pallé, E.; et al. Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization. Astronomy & Astrophysics. August 2019, 628: A39. Bibcode:2019A&A...628A..39L. S2CID 139102184. arXiv:1904.12818 . doi:10.1051/0004-6361/201935801.

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格利澤357

行星系統

參考資料

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