编辑“︁HD 38529”︁（章节）

==HD 38529 A==
'''HD 38529 A'''是一顆黃[[次巨星]]，在光譜分類中曾被列為代表[[黃矮星]]的G4V。它的質量比太陽高40%。在該恆星旁已發現兩顆亞恆星伴星，其中一顆伴星的質量已經到達了[[氘燃燒]]下限，被認為是[[棕矮星]]或氣體巨行星。另外距離該恆星86天文單位處有[[岩屑盤]]存在<ref>{{cite journal | url=http://www.iop.org/EJ/abstract/0004-637X/677/1/630/ | title=The Complete Census of 70 μm-bright Debris Disks within "the Formation and Evolution of Planetary Systems" Spitzer Legacy Survey of Sun-like Stars | author=Hillenbrand ''et al.'' | year=2008 | journal=The [[Astrophysical Journal]] | volume=677 | issue=1 | pages=630–656 | format=abstract | doi=10.1086/529027 | last2=Carpenter | first2=John M. | last3=Kim | first3=Jinyoung Serena | last4=Meyer | first4=Michael R. | last5=Backman | first5=Dana E. | last6=Moro‐martín | first6=Amaya | last7=Hollenbach | first7=David J. | last8=Hines | first8=Dean C. | last9=Pascucci | first9=Ilaria | bibcode=2008ApJ...677..630H}}([http://xxx.lanl.gov/abs/0801.0163 web Preprint])</ref>。

===行星系統===
2002年[[黛布拉·費希爾]]以[[都卜勒光譜學]]的方式在恆星 HD 38529 A 旁發現[[系外行星]] [[HD 38529 b]]<ref>{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/551/2/1107/52326.html | author=Fischer ''et al.'' | title=Planetary Companions to HD 12661, HD 92788, and HD 38529 and Variations in Keplerian Residuals of Extrasolar Planets | journal=The [[Astrophysical Journal]] | year=2002 | volume=551 | issue=2 | pages=1107–1118 | doi=10.1086/320224 | last2=Marcy | first2=Geoffrey W. | last3=Butler | first3=R. Paul | last4=Vogt | first4=Steven S. | last5=Frink | first5=Sabine | last6=Apps | first6=Kevin | bibcode=2001ApJ...551.1107F | access-date=2012-07-31 | archive-date=2019-12-07 | archive-url=https://web.archive.org/web/20191207151057/http://www.iop.org/EJ/article/0004-637X/551/2/1107/52326.html | dead-url=no }}</ref>。該行星的質量是木星的78%，且相當靠近母恆星，因此被列為[[熱木星]]。一年後再發現一顆比木星大的系外行星 HD 38529 c，它距離母恆星3.68天文單位，[[質量下限]]是木星的12.7倍<ref>{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/586/2/1394/57020.html | author=Fischer ''et al.'' | title=A Planetary Companion to HD 40979 and Additional Planets Orbiting HD 12661 and HD 38529 | journal=The [[Astrophysical Journal]] | year=2003 | volume=586 | issue=2 |  pages=1394–1408 | doi=10.1086/367889 | last2=Marcy | first2=Geoffrey W. | last3=Butler | first3=R. Paul | last4=Vogt | first4=Steven S. | last5=Henry | first5=Gregory W. | last6=Pourbaix | first6=Dimitri | last7=Walp | first7=Bernard | last8=Misch | first8=Anthony A. | last9=Wright | first9=Jason T. | bibcode=2003ApJ...586.1394F}}</ref>。[[依巴谷衛星]]的天文測量資料顯示該行星的軌道傾角最佳擬合解為160°，因此[[真實質量]]應是木星的37倍，因此被改列為[[棕矮星]]<ref>{{cite journal | url=https://openaccess.leidenuniv.nl/bitstream/1887/7483/1/A&A_449_699_702.pdf | author=Reffert, S., Quirrenbach, A. | title=Hipparcos astrometric orbits for two brown dwarf companions: HD 38529 and HD 168443 | journal=[[Astronomy and Astrophysics]] | volume=449 | issue=2 | year=2006 | pages=699–702 | doi=10.1051/0004-6361:20054611 | format=PDF | bibcode=2006A&A...449..699R | access-date=2021-02-06 | archive-date=2019-10-17 | archive-url=https://web.archive.org/web/20191017034524/https://openaccess.leidenuniv.nl/bitstream/1887/7483/1/A%26A_449_699_702.pdf | dead-url=no }}</ref>。接著使用[[哈伯太空望遠鏡]]對這個系統更深入的天文測量將 HD 38529 c 的質量下修到17.7倍木星質量，代表有另一顆行星在已發現的兩個天體之間環繞恆星<ref name="benedict2010">{{cite arXiv|author=G. Fritz Benedict, Barbara E. McArthur, Jacob L. Bean, Rory Barnes, Thomas E. Harrison, Artie Hatzes, Eder Martioli, Edmund P. Nelan|title=The Mass of HD 38529 c from Hubble Space Telescope Astrometry and High-Precision Radial Velocities|eprint=1003.0421|class=astro-ph.SR|year=2010|version=v1|accessdate=2010-03-03}}</ref>。

{{OrbitboxPlanet begin
| name=HD 38529 A
| table_ref=<ref name="benedict2010"/><ref group="note">HD 38529 b 和 HD 38529 c 這兩顆已確認天體的軌道是來自由兩個解組成的伴隨解（表12）。包含未確認的第三個天體時獲得的軌道參數則稍有不同（表11）。</ref>}}
{{OrbitboxPlanet
| exoplanet = [[HD 38529 b|b]]
| mass = >(0.92 ± 0.043)
| period = 14.3104 ± 0.05
| semimajor = 0.131 ± 0.0015
| eccentricity = 0.248 ± 0.0007
}}
{{OrbitboxPlanet hypothetical
| exoplanet = d
| mass = >(0.17 ± 0.06)
| period = 193.9 ± 2.9
| semimajor = 0.75 ± 0.14
| eccentricity = 0.23 ± 0.13
}}
{{OrbitboxPlanet
| exoplanet = c
| mass = 17.7{{±|1.7|1.4}}
| period = 2134.76 ± 0.40
| semimajor = 3.695 ± 0.043
| eccentricity = 0.36 ± 0.05
}}
{{OrbitboxPlanet disk
| disk = [[岩屑盤]]
| periapsis = >86
}}
{{Orbitbox end}}