| 词条 | HD 93129 |
| 释义 |
| name=HD 93129 }}{{Starbox image | image= | caption=HD 93129 surrounded by the lesser stars of Trumpler 14 | credit=NASA & ESA, Jesús Maíz Apellániz (Instituto de Astrofisica de Andalucia) }}{{Starbox observe | epoch=J2000 | constell=Carina | ra={{RA|10|43|57.5}}[1] | dec={{DEC|−59|32|51.3}}[1] | appmag_v=6.90[2] {{nowrap|(7.310[1] + 8.84[5])}} }}{{Starbox character | component1 = A | class=O2If*[3] (O2If+O3.5V[4]) | b-v=+0.25[5] | u-b=−0.81[5] | variable= | component2 = B | type2 = main sequence | class2= O3.5 V((f))z[5] | b-v2=+0.23[6] | u-b2=−0.79[6] | variable2= }}{{Starbox astrometry | radial_v=−0.4 ± 7.4[13] | prop_mo_ra=-5.0[1] | prop_mo_dec=17.0[1] | dist_pc=2,300[4] | absmag_v={{nowrap|(A): −6.5 (−6.1 + −5.2)}} (B): −4.9[7] }}{{Starbox detail | component1=Aa | metal= | mass=110[7] | radius=22.5[19] | rotational_velocity=130[19] | luminosity=1,480,000[21] | temperature=42,500[19] | gravity=3.71[8] | age_myr= {{val|0.9|0.2|0.4}}[9] | component2=Ab | metal2= | mass2=70[7] | radius2=13.1[26] | rotational_velocity2= | luminosity2=575,000[21] | temperature2=44,000[10] | gravity2= }}{{Starbox detail|no_heading=y | component1 = B | mass = 52[11] | radius = 13[11] | gravity = 3.92[11] | rotational_velocity = 112[9] | temperature = 44,000[11] | luminosity = 575,000[12] }}{{Starbox catalogue | names = CD−58° 3528, HIP 114507, {{nowrap|Trumpler 14 1}}, CCDM J10440-5933, WDS J10440-5933 | component1 = A | names1 = TYC 8626-2805-1, ALS 15862, LS 1820 | component2 = B | names2 = ALS 19309 }}{{Starbox reference | Simbad=HD+93129 |sn=HD 93129 | Simbad2=HD+93129A |sn2=HD 93129 A | Simbad3=HD+93129B |sn3=HD 93129 B }}{{Starbox end}} HD 93129 is a triple star system in the Carina Nebula, with all three components being hot O class stars amongst the most luminous stars in the Milky Way. It is the dominant member of the Trumpler 14 star cluster, a young star cluster within the Carina OB1 stellar association that harbors other super luminous stars, like Eta Carinae and WR 25. LocationHD 93129 is found at the centre of the massive Trumpler 14 open cluster in the Carina Nebula star forming region. It is too far away for its distance to have been accurately determined using the annual parallax method, but accurate distances for η Carinae and the Homunculus Nebula, modelling of clusters, and astrophysical data about other stars assumed to be within the same region, all lead to a distance around 2,300 parsecs.[4] HD 93129 Aa is the closet O2 supergiant to Earth.[36] That area of the sky is home to many other massive and luminous stars. HD 93128, yet another O3.5 main sequence star, is only 24' away within Trumpler 14, and HD 93250 and HD 93205 are two more O3.5 stars in the larger Trumpler 16 cluster around η Carinae. There are also three Wolf-Rayet stars, an O4 supergiant, many other class O stars, and the unique η Carinae itself.[12] SystemHD 93129 consists of two clearly resolved components, HD 93129 A and HD 93129 B, and HD 93129 A itself is made up of two much closer stars. HD 93129 A has been resolved into two components. The spectrum is dominated by the brighter component, although the secondary is only 0.9 magnitudes fainter. HD 93129 Aa is an O2 supergiant and Ab is an O3.5 main sequence star.[13] Their separation has decreased from 55 mas in 2004 to only 27 mas in 2013, but an accurate orbit is not available.[14] HD 93129 B is an O3.5 main-sequence star 3 arc-seconds away from the closer pair. It is about 1.5 magnitudes fainter than the combined HD 93129 A, and approximately the same brightness as HD 93129 Ab.[1][6] A further 5 fainter stars within 5 arc-seconds have been detected, between five and seven magnitudes fainter at infrared wavelengths.[14] PropertiesAll three stars of HD 93129 are among the most luminous in the galaxy;[4] {{solar luminosity|1,480,000}} for the supergiant primary and {{solar luminosity|575,000}} for each of the other two stars. They are also among the hottest, with the supergiant at 42,500 K and the other two at 52,000 K. The stars have masses calculated to be between {{solar mass|70}} and {{solar mass|110}}. HD 93129Aa has left the main sequence and its age is estimated to be around 900,000 years. The existence of the zero-age main sequence stars within Trumpler 14 suggest its age may be less than 600,000 years.[9] See also
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Cumulative energy input from massive stars|journal=Monthly Notices of the Royal Astronomical Society|volume=367|issue=2|pages=763–772|author1=Smith|first1=Nathan|year=2006|doi=10.1111/j.1365-2966.2006.10007.x}} 13. ^{{cite journal |last=Benaglia |first=P. |authorlink= |author2=Koribalski, B. |year=2004 |title=Radio observations of HD 93129A: The earliest O star with the highest mass loss? |journal=Astronomy & Astrophysics |volume=416 |issue= 1|pages=171–178 |doi=10.1051/0004-6361:20034138 |url= |accessdate= |quote= |bibcode=2004A&A...416..171B|arxiv = astro-ph/0312003}} 14. ^1 2 {{cite journal|bibcode=2014ApJS..215...15S|title=Southern Massive Stars at High Angular Resolution: Observational Campaign and Companion Detection|journal=The Astrophysical Journal Supplement|volume=215|pages=15|author1=Sana|first1=H.|last2=Le Bouquin|first2=J.-B.|last3=Lacour|first3=S.|last4=Berger|first4=J.-P.|last5=Duvert|first5=G.|last6=Gauchet|first6=L.|last7=Norris|first7=B.|last8=Olofsson|first8=J.|last9=Pickel|first9=D.|last10=Zins|first10=G.|last11=Absil|first11=O.|last12=De Koter|first12=A.|last13=Kratter|first13=K.|last14=Schnurr|first14=O.|last15=Zinnecker|first15=H.|year=2014|doi=10.1088/0067-0049/215/1/15|arxiv = 1409.6304 }} External links
10 : Carina (constellation)|Carina Nebula|Henry Draper Catalogue objects|Hipparcos objects|Durchmusterung objects|O-type supergiants|O-type main-sequence stars|Emission-line stars|Spectroscopic binaries|Triple star systems |
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