Wolf 359: Perbedaan antara revisi
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{{Starbox image|image=[[Berkas:Leo constellation map.svg|250px]]|caption=}}
{{Starbox observe|epoch=J2000|constell=[[Leo]]|ra={{RA|10|56|28.99}}<ref name="SIMBAD"/>|dec={{DEC|+07|00|52.0}}<ref name="SIMBAD" />|appmag_v=13.54<ref name="SIMBAD" />}}
{{Starbox character|class=M6.5 Ve<ref name="SIMBAD" />|b-v=+2.034<ref name=aj137_5/>|u-b=+1.165<ref name=aj137_5/>|variable=[[
{{Starbox astrometry|radial_v=+19 ± 1<ref name="apj5832"/>|prop_mo_ra=–3842<ref name="SIMBAD" />|prop_mo_dec=–2725<ref name="SIMBAD" />|parallax=415.16|p_error=1.62|parallax_footnote={{r|Davison2015}}|absmag_v=16.65<ref name=Mv/>}}
{{Starbox detail|age_myr=100–350<ref name="aaa4474"/>|metal_fe={{nowrap|+0.18 ± 0.17}}<ref name=apj748_2_934/>|gravity=5.5<ref name=aaa439_3/>|mass=0.09<ref name="RECONS2"/>|radius=0.16<ref name=aaa235_1_2/>|rotational_velocity=< 3.0<ref name="apj5832"/>|luminosity_bolometric=0.0014|luminosity_visual=0.00002|temperature={{nowrap|2,800 ± 100}}<ref name="aaa4474"/>|habitable_inner=0.024<ref name="aaa555_A104"/> [[Astronomical Unit|AU]]|habitable_outer=0.052<ref name="aaa555_A104"/> AU}}
{{Starbox catalog|names=CN Leonis, CN Leo, [[Gliese-Jahreiss catalogue|GJ]] 406, [[Henry-Lee Giclas|G]] 045-020, [[Luyten Two-Tenths catalogue|LTT]] 12923, LFT 750, [[Luyten Half-Second catalogue|LHS]] 36,<ref name="SIMBAD" /> [[General Catalogue of Trigonometric Parallaxes|GCTP]] 2553.}}
{{Starbox reference|Simbad=Wolf+359}}
{{Starbox end}}{{Sky|10|56|28.99|+|07|00|52|7.78}}<span data-segmentid="197" class="cx-segment">'''Wolf 359''' adalah bintang [[katai merah]] yang terletak di rasi bintang [[Leo]], dekat [[ekliptika]].</span> <span data-segmentid="201" class="cx-segment">Pada jarak sekitar 7,9 [[tahun cahaya]] dari [[Bumi]],
<span data-segmentid="217" class="cx-segment">Wolf 359 adalah salah satu bintang yang paling redup dan bermassa paling rendah.</span> <span data-segmentid="218" class="cx-segment">Pada lapisan pemancar cahaya yang disebut [[fotosfer]],
== Sejarah
<span data-segmentid="240" class="cx-segment">Wolf 359 pertama kali menjadi perhatian para astronom karena laju gerak
<span data-segmentid="251" class="cx-segment">Pengukuran [[paralaks]] pertama dari Wolf 359 dilaporkan pada tahun 1928 dari [[Observatorium Mount Wilson|Mount Wilson Observatory]], menghasilkan perubahan tahunan pada posisi bintang sebesar {{Nowrap|0.407 ± 0.009 [[arcsecond|detik ark]]}}
== Properti ==
<span data-segmentid="264" class="cx-segment">Wolf 359 memiliki [[klasifikasi bintang]] M6.5,<ref name="mnras245_3"><cite class="citation journal">Mukai, K.; et al. (August 1990). "Spectroscopy of faint, high latitude cataclysmic variable candidates". ''[[Monthly Notices of the Royal Astronomical Society]]''. '''245''' (3): 385–391. [[Bibcode]]:[[bibcode:1990MNRAS.245..385M|1990MNRAS.245..385M]].</cite></ref> meskipun berbagai sumber mencantumkan kelas spektral M5.5,<ref name="aaa4662"><cite class="citation journal">Reiners, A.; et al. (2007). "Rapid magnetic flux variability on the flare star CN Leonis". ''Astronomy and Astrophysics''. '''466''' (2): L13–L16. [[arXiv]]:<span class="cs1-lock-free" title="Freely accessible">[//arxiv.org/abs/astro-ph/0703172 astro-ph/0703172]</span>. [[Bibcode]]:[[bibcode:2007A&A...466L..13R|2007A&A...466L..13R]]. [[Digital object identifier|doi]]:[[doi:10.1051/0004-6361:20077095|10.1051/0004-6361:20077095]].</cite></ref> M6 <ref name="RECONS2"><cite class="citation web">Staff (June 8, 2007). [http://joy.chara.gsu.edu/RECONS/ "List of the nearest 100 stellar systems"]. Research Consortium on Nearby Stars<span class="reference-accessdate">. Retrieved <span class="nowrap">2007-07-16</span></span>.</cite></ref> atau M8.<ref name="apj4512"><cite class="citation journal">Robinson, R. D.; et al. (1995). "A search for microflaring activity on dMe flare stars. I. Observations of the dM8e Star CN Leonis". ''Astrophysical Journal''. '''451''': 795–805. [[Bibcode]]:[[bibcode:1995ApJ...451..795R|1995ApJ...451..795R]]. [[Digital object identifier|doi]]:[[doi:10.1086/176266|10.1086/176266]].</cite></ref></span> <span data-segmentid="266" class="cx-segment">[[Klasifikasi bintang|Bintang tipe M]] dikenal sebagai [[katai merah]] : disebut merah karena emisi energi bintang mencapai puncak di bagian spektrum merah dan inframerah.<ref name="jones09"><cite class="citation book">Jones, Lauren V. (2009). ''Stars and galaxies''. Greenwood Guides to the Universe. ABC-CLIO. p. 50. [[International Standard Book Number|ISBN]] [[Istimewa:BookSources/978-0-313-34075-8|<bdi>978-0-313-34075-8</bdi>]].</cite></ref></span> <span data-segmentid="269" class="cx-segment">Wolf 359 memiliki luminositas yang sangat rendah, memancarkan sekitar 0,1% dari [[Luminositas matahari|energi Matahari]].<ref name="aaa4474"><cite class="citation journal">Pavlenko, Ya. V.; et al. (2006). "Spectral energy distribution for GJ406". ''Astronomy and Astrophysics''. '''447''' (2): 709–717. [[arXiv]]:<span class="cs1-lock-free" title="Freely accessible">[//arxiv.org/abs/astro-ph/0510570 astro-ph/0510570]</span>. [[Bibcode]]:[[bibcode:2006A&A...447..709P|2006A&A...447..709P]]. [[Digital object identifier|doi]]:[[doi:10.1051/0004-6361:20052979|10.1051/0004-6361:20052979]].</cite></ref><ref name="jaavso30_2"><cite class="citation journal">West, Frederick R. (2002). "Letter to the Editor: the corona of CN Leonis (Gliese 406) and its possible detection at radio frequencies". ''The Journal of the American Association of Variable Star Observers''. '''30''' (2): 149–150. [[Bibcode]]:[[bibcode:2002JAVSO..30..149W|2002JAVSO..30..149W]].</cite></ref></span> <span data-segmentid="271" class="cx-segment">Jika dipindahkan ke lokasi Matahari,
[[Berkas:Wolf359.jpg|ka|jmpl|<span data-segmentid="195" class="cx-segment">Wolf 359 adalah bintang berwarna oranye yang terletak tepat di atas pusat [[Astrofotografi|astrophotograph]] 2009 ini.</span>]]
<span data-segmentid="273" class="cx-segment">
<span data-segmentid="284" class="cx-segment">Seluruh bintang sedang mengalami [[Zona konveksi|konveksi]], di mana energi yang dihasilkan pada inti diangkut ke permukaan oleh gerakan [[Konveksi|konvektif]] [[Plasma (wujud zat)|plasma]], bukan melalui transmisi melalui [[Zona radiasi|radiasi]]
<span data-segmentid="295" class="cx-segment">Pencarian bintang ini oleh [[Teleskop luar angkasa Hubble|Teleskop Luar Angkasa Hubble]] mengungkapkan tidak ada
=== Atmosfer Terluar ===
<span data-segmentid="308" class="cx-segment">Lapisan luar, pemancar cahaya dari sebuah bintang dikenal sebagai [[fotosfer]].</span> <span data-segmentid="310" class="cx-segment">Perkiraan suhu
<span data-segmentid="326" class="cx-segment">Di luar
<span data-segmentid="333" class="cx-segment">Wolf 359 diklasifikasikan sebagai [[bintang suar]] tipe [[Luyten 726-8|UV Ceti]],<ref name="ass95_2"><cite class="citation journal">Gershberg, R. E.; et al. (1983). "Characteristics of activity energetics of the UV Cet-type flare stars". ''Astrophysics and Space Science''. '''95''' (2): 235–253. [[Bibcode]]:[[bibcode:1983Ap&SS..95..235G|1983Ap&SS..95..235G]]. [[Digital object identifier|doi]]:[[doi:10.1007/BF00653631|10.1007/BF00653631]].</cite></ref> yang merupakan bintang yang mengalami peningkatan luminositas singkat dan enerjik karena aktivitas magnetik di fotosfer
=== Gerakan ===
[[Berkas:Near-stars-past-future-en.svg|jmpl|321x321px|<span data-segmentid="352" class="cx-segment">Jarak [[Daftar bintang terdekat|bintang terdekat]] dari 20.000 tahun yang lalu hingga 80.000 tahun di masa depan.</span>]]
<span data-segmentid="354" class="cx-segment">Rotasi bintang menyebabkan [[Efek Doppler|pergeseran Doppler]] ke spektrum.</span> <span data-segmentid="356" class="cx-segment">Rata-rata, ini menghasilkan perluasan [[
<span data-segmentid="367" class="cx-segment">Gerak
== Sistem
<span data-segmentid="386" class="cx-segment">Pada bulan Juni 2019 dua planet kandidat dilaporkan di orbit sekitar Wolf 359 (GJ 406).</span> <span data-segmentid="387" class="cx-segment">Mereka dideteksi menggunakan [[kecepatan radial]] dari pengamatan dengan [[HARPS]] di Chili dan [[Observatorium W. M. Keck|HIRES]] di Hawaii.<ref name="barnes"><cite class="citation arxiv">Tuomi, M.; Jones, H. R. A.; Anglada-Escudé, G.; Butler, R. P.; Arriagada, P.; Vogt, S. S.; Burt, J.; Laughlin, G.; Holden, B.; Teske, J. K.; Shectman, S. A.; Crane, J. D.; Thompson, I.; Keiser, S.; Jenkins, J. S.; Berdiñas, Z.; Diaz, M.; Kiraga, M.; Barnes, J. R. (2019). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". [[arXiv]]:<span class="cs1-lock-free" title="Freely accessible">[//arxiv.org/abs/1906.04644v1 1906.04644v1]</span> [[//arxiv.org/archive/astro-ph.EP astro-ph.EP]].</cite></ref></span> {{OrbitboxPlanet begin}}
{{OrbitboxPlanet|exoplanet=[[Wolf 359 b|b]]|mass_earth={{val|3.8|2.0|1.6}}|period={{val|2.68687|0.00039|0.00031}}|semimajor={{val|0.018|0.002}}|eccentricity={{val|0.15|0.20|0.15}}|inclination=}}
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{{Reflist}}
== Pranala
{{commons category}}
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* {{cite journal|last=Dittmann|first=Jason A.|last2=Irwin|first2=Jonathan M.|last3=Charbonneau|first3=David|last4=Berta-Thompson|first4=Zachory K.|year=2014|title=Trigonometric Parallaxes for 1507 Nearby Mid-to-late M Dwarfs|journal=[[The Astrophysical Journal]]|volume=784|issue=2|pages=156|arxiv=1312.3241|bibcode=2014ApJ...784..156D|doi=10.1088/0004-637X/784/2/156}} [https://www.cfa.harvard.edu/MEarth/MEarth_Parallaxes.txt Table with parallaxes].
* {{cite journal|last1=Henry|first1=Todd J.|last2=Subasavage|first2=John P.|last3=Brown|first3=Misty A.|last4=Beaulieu|first4=Thomas D.|last5=Jao|first5=Wei-Chun|last6=Hambly|first6=Nigel C.|display-authors=1|date=November 2004|title=The solar neighborhood. X. new nearby stars in the southern sky and accurate photometric distance estimates for red dwarfs|journal=The Astronomical Journal|volume=128|issue=5|pages=2460–2473|arxiv=astro-ph/0408240|bibcode=2004AJ....128.2460H|doi=10.1086/425052}}
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