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HD 34989

HD 34989
Observationsdata
Epok: J2000.0
StjärnbildOrion
Rektascension05t 21m 43,5619 s[1]
Deklination+08° 25′ 42,841″[1]
Skenbar magnitud ()+5,80 (v)[2]
Stjärntyp
SpektraltypB1 V[3]
U–B-0,88[2]
B–V-0,13[2]
Astrometri
Radialhastighet ()+25,30 ± 3,5[4] km/s
Egenrörelse (µ)RA: -0,438 ± 0,227[1] mas/år
Dek.: -4,493 ± 0,184[1] mas/år
Parallax ()1,8706 ± 0,1413[1]
Avstånd1 700 ± 100  (530 ± 40 pc)
Absolut magnitud ()-2,36[5]
Detaljer
Massa12,1 ± 0,1[6] M
Radie6,58[7] R
Luminositet1 508[5] L
Temperatur24 838 ± 450[8] K
Metallicitet-0,43 (Fe/H)[9] dex
Ålder8,0 ± 2,0[6] miljarder år
Andra beteckningar
AG+08 591, ALS 8286, BD+08 933, FK5 2401, GSC 00700-01015, HIC 25041, HIP 25041, HR 1763, IRAS 05190+0822, LS VI +08 1, 2MASS J05214355+0825425, PPM 148818, SAO 112667, TD1 4461, TYC 700-1015-1, uvby98 100034989, VDB 38, Gaia DR2 3337540818534302720, Gaia EDR3 3337540818534302720 [10]

HD 34989 är en ensam stjärna i den mellersta delen av stjärnbilden Orion. Den har en skenbar magnitud av ca 5,80[2] och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 1,9[2] mas, beräknas den befinna sig på ett avstånd på ca 1 700 ljusår (ca 530 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 25 km/s.[4]

Egenskaper

HD 34989 är en blå till vit stjärna i huvudserien av spektralklass B1 V.[3] Den har en massa som är ca 12[6] solmassor, en radie som är ca 6,6[7] solradier och har ca 1 500 gånger solens utstrålning av energi[5] från dess fotosfär vid en effektiv temperatur av ca 24 800 K.[8]

HD 34989 i mitten, visad vid infraröda våglängder med Spitzer Space Telescope.

HD 34989 verkar insvept i en omfattande nebulositet som delvis lyser genom reflektion och delvis genom emission. Reflektionsnebulosan är listad som GN 05.19.0[11] och H II-regionen kallas Sh2-263. HD 34989 är den joniserande källan till denna H II-region. I observationer med kolmonoxid motsvarar detta ett cirkulärt hål.[12] Stjärnan har en storlek på cirka 0,118 ± 0,026 mas, baserat på SED-anpassning.[13]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, HD 34989, 27 mars 2022.

Noter

  1. ^ [a b c d e] Gaia Collaboration (2018-08-01). "Gaia Data Release 2 - Summary of the contents and survey properties". Astronomy & Astrophysics. 616: A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. ISSN 0004-6361. S2CID 49211658.
  2. ^ [a b c d e] Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". YCat. Bibcode:2002yCat.2237....0D.
  3. ^ [a b] Sharpless, Stewart (September 1952). "A Study of the Orion Aggregate of Early-Type Stars". Astrophysical Journal. 116: 251. Bibcode:1952ApJ...116..251S. doi:10.1086/145610. ISSN 0004-637X.
  4. ^ [a b] Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
  5. ^ [a b c] Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  6. ^ [a b c] Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011-01-01). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. ISSN 0035-8711. S2CID 118629873.
  7. ^ [a b] https://www.universeguide.com/star/25041/hd34989. Hämtad 2022-05-28.
  8. ^ [a b] Huang, Wenjin; Gies, D. R.; McSwain, M. V. (October 2010). "A Stellar Rotation Census of B Stars: From ZAMS to TAMS". Astrophysical Journal. 722 (1): 605–619. arXiv:1008.1761. Bibcode:2010ApJ...722..605H. doi:10.1088/0004-637X/722/1/605. ISSN 0004-637X. S2CID 118532653.
  9. ^ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy and Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. S2CID 119258214.
  10. ^ HD 34989 (unistra.fr) Hämtad 2022-05-28.
  11. ^ Magakian, T. Yu (February 2003). "Merged catalogue of reflection nebulae". A&A. 399: 141–145. Bibcode:2003A&A...399..141M. doi:10.1051/0004-6361:20021743. ISSN 0004-6361.
  12. ^ Lang, W. J.; Masheder, M. R. W.; Dame, T. M.; Thaddeus, P. (May 2000). "The lambda -Orionis Ring in CO". A&A. 357: 1001–1012. Bibcode:2000A&A...357.1001L. ISSN 0004-6361.
  13. ^ Swihart, Samuel J.; Garcia, E. Victor; Stassun, Keivan G.; Belle, Gerard van; Mutterspaugh, Matthew W.; Elias, Nicholas (December 2016). "A Catalog of Calibrator Stars for Next-Generation Optical Interferometers". The Astronomical Journal. 153 (1): 16. arXiv:1610.04600. doi:10.3847/1538-3881/153/1/16. ISSN 1538-3881. S2CID 118733649.

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