Gliese 357

Gliese 357
Image showing a red star and three planets. GJ357d is green and covered with life.
Ilustrasi seniman mengenai sistem Gliese 357 (GJ357).
Data pengamatan
Epos J2000      Ekuinoks J2000
Rasi bintang Hydra
Asensio rekta  09j 36m 01.63722d[1]
Deklinasi  -21° 39′ 38.8776″[1]
Magnitudo tampak (V) 10.906[2]
Ciri-ciri
Tahap evolusi deret utama
Kelas spektrum M2.5V[3]
Astrometri
Kecepatan radial (Rv)−35,03±0,17[1] km/s
Gerak diri (μ) RA: 138,722±0,023[1] mdb/thn
Dek.: −990,342±0,020[1] mdb/thn
Paralaks (π)105,9789±0,0227[1] mdb
Jarak30,776 ± 0,007 tc
(9,436 ± 0,002 pc)
Magnitudo mutlak (MV)+11.13[4]
Detail
Massa0.362[5] M☉
Radius0.333[4] R☉
Luminositas0.014[6] L☉
Gravitasi permukaan (log g)4.96[5]
Suhu3,488[5] K
Metalisitas [Fe/H]−0,14[5]
Rotasi74,3±1,7 h[7]
Kecepatan rotasi (v sin i)2.5[5] km/s
Penamaan lain
HIP 47103, 2MASS 09360161-2139371, TOI 562
Referensi basis data
SIMBADdata

GJ 357 (Gliese 357) adalah sebuah Bintang deret utama tipe-M dengan aktivitas bintik bintang yang tak biasa rendah.[8] Bintang ini terletak 31 tahun cahaya dari Tata Surya,[9] di rasi bintang Hydra.[9]

Referensi

  1. ^ a b c d e Kesalahan pengutipan: Tanda <ref> tidak sah; tidak ditemukan teks untuk ref bernama GaiaDR3
  2. ^ Koen, C.; Kilkenny, D.; Van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society. 403 (4): 1949. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x.
  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. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. S2CID 119476992.
  4. ^ a b Houdebine, E. R.; Mullan, D. J.; Paletou, F.; Gebran, M.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2016). "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. 822 (2): 97. arXiv:1604.07920. Bibcode:2016ApJ...822...97H. doi:10.3847/0004-637X/822/2/97. S2CID 119118088.
  5. ^ a b c d e 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. (2018). "The CARMENES search for exoplanets around M dwarfs. Photospheric parameters of target stars from high-resolution spectroscopy". Astronomy and Astrophysics. 615: A6. arXiv:1802.02946. Bibcode:2018A&A...615A...6P. doi:10.1051/0004-6361/201732312. S2CID 55639432.
  6. ^ Morales, J. C.; Ribas, I.; Jordi, C.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2008). "The effect of activity on stellar temperatures and radii". Astronomy and Astrophysics. 478 (2): 507. arXiv:0711.3523. Bibcode:2008A&A...478..507M. doi:10.1051/0004-6361:20078324. S2CID 16238033.
  7. ^ Suárez Mascareño, A.; Rebolo, R.; González Hernández, J. I.; Esposito, M. (2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society, 452 (3): 2745–2756, arXiv:1506.08039, Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441 Pemeliharaan CS1: DOI bebas tanpa ditandai (link)
  8. ^ Modirrousta-Galian, D.; Stelzer, B.; Magaudda, E.; Maldonado, J.; Güdel, M.; Sanz-Forcada, J.; Edwards, B.; Micela, G. (2020), "A Super-Earth Orbiting an Extremely Inactive Host Star", Astronomy & Astrophysics, A113: 641, arXiv:2007.10262, doi:10.1051/0004-6361/202038280, S2CID 220647396
  9. ^ a b Reddy, Francis; Center, NASA’s Goddard Space Flight (2019-07-31). "TESS Discovers Habitable Zone Planet in GJ 357 System". SciTechDaily (dalam bahasa American English). Diarsipkan dari versi aslinya tanggal 2019-08-01. Diakses tanggal 2019-08-01.

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