විකිපීඩියා

සිරියස්

(Sirius B වෙතින් යළි-යොමු කරන ලදි)

සිරියස් යනු රාත්‍රි අහසේ දිස්වන දීප්තිමත්ම තාරකාවයි. −1.46 ක දෘෂ්ටිමය දාශ්‍ය විශාලත්වයක් සහිතවූ එය, ඊලඟ දීප්තිමත් තාරකාව වන කැනොපස් ට වඩා දෙගුණයක් දීප්තිමත්ය.

Sirius
සිරියස් හි පිහිටීම (රවුම් කොට දක්වා ඇත)
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Canis Major
Pronunciation /ˈsɪriəs/[1]
Sirius A
Right ascension 06පැය 45විනා 08.917තත්[2]
Declination −16° 42′ 58.02″[2]
Apparent magnitude (V) −1.46[3]
Sirius B
Right ascension 06පැය 45විනා 09.0තත්[4]
Declination −16° 43′ 06″[4]
Apparent magnitude (V) 8.44[5]
Characteristics
Sirius A
Evolutionary stage Main sequence
Spectral type A0mA1 Va[6]
U−B colour index −0.05[3]
B−V colour index +0.00[3]
Sirius B
Evolutionary stage White dwarf
Spectral type DA2[5]
U−B colour index −1.04[7]
B−V colour index −0.03[7]
Astrometry
Radial velocity (Rv)−5.50[8] km/s
Sirius A
Proper motion (μ) RA: −546.01 mas/yr[9]
Dec.: −1,223.07 mas/yr[9]
Parallax (π)379.21 ± 1.58 mas[9]
Distance8.60 ± 0.04 ly
(2.64 ± 0.01 pc)
Absolute magnitude (MV)+1.43[10]
Sirius B
Proper motion (μ) RA: −461.571 mas/yr[11]
Dec.: −914.520 mas/yr[11]
Parallax (π)374.4896 ± 0.2313 mas[11]
Distance8.709 ± 0.005 ly
(2.670 ± 0.002 pc)
Absolute magnitude (MV)+11.18[7]
Orbit[12]
Primaryα Canis Majoris A
Companionα Canis Majoris B
Period (P)50.1284 ± 0.0043 yr
Semi-major axis (a)7.4957 ± 0.0025″
Eccentricity (e)0.59142 ± 0.00037
Inclination (i)136.336 ± 0.040°
Longitude of the node (Ω)45.400 ± 0.071°
Periastron epoch (T)1,994.5715 ± 0.0058
Argument of periastron (ω)
(secondary)		149.161 ± 0.075°
තොරතුරු පුවරුව
Sirius A
Mass2.063±0.023[12] M☉
Radius1.711[13] R☉
Luminosity25.4[13] L☉
Surface gravity (log g)4.33[14] cgs
Temperature9,940[14] K
Metallicity [Fe/H]0.50[15] dex
Rotational velocity (v sin i)16[16] km/s
Age242±5[12] Myr
Sirius B
Mass1.018 ± 0.011[12] M☉
Radius0.0084 ± 3%[17] R☉
Luminosity0.056[18] L☉
Surface gravity (log g)8.57[17] cgs
Temperature25,000 ± 200[13] K
Age228+10
−8[12] Myr
Other designations
Dog Star, Aschere, Canicula, Al Shira, Sothis,[19] Alhabor,[20] Mrgavyadha, Lubdhaka,[21] Tenrōsei,[22] α Canis Majoris (α CMa), 9 Canis Majoris (9 CMa), HD 48915, HR 2491, BD−16°1591, GJ 244, LHS 219, ADS 5423, LTT 2638, HIP 32349[23]
Sirius B: EGGR 49, WD 0642-166, GCTP 1577.00[24]
Database references
A
B

ආශ්‍රිත ලිපි

සංස්කරණය

සටහන්

සංස්කරණය

මූලාශ්‍ර

සංස්කරණය

උපහරණ

සංස්කරණය
  1. ^ "Sirius". Dictionary.com Unabridged (v 1.1). Random House, Inc. සම්ප්‍රවේශය 6 April 2008.
  2. ^ a b Fabricius, C.; Høg, E.; Makarov, V.V.; Mason, B.D.; Wycoff, G.L.; Urban, S.E. (2002). "The Tycho double star catalogue". Astronomy and Astrophysics. 384: 180–189. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822.
  3. ^ a b c Hoffleit, D.; Warren, W. H. Jr. (1991). "Entry for HR 2491". Bright Star Catalogue (5th Revised Ed. (Preliminary Version) ed.). CDS. Bibcode:1991bsc..book.....H.
  4. ^ a b Gianninas, A.; Bergeron, P.; Ruiz, M.T. (2011). "A spectroscopic survey and analysis of bright, hydrogen-rich white dwarfs". The Astrophysical Journal. 743 (2): 138. arXiv:1109.3171. Bibcode:2011ApJ...743..138G. doi:10.1088/0004-637X/743/2/138. S2CID 119210906.
  5. ^ a b Holberg, J.B.; Oswalt, T.D.; Sion, E.M.; Barstow, M.A.; Burleigh, M.R. (2013). "Where are all the Sirius-like binary systems?". Monthly Notices of the Royal Astronomical Society. 435 (3): 2077–2091. arXiv:1307.8047. Bibcode:2013MNRAS.435.2077H. doi:10.1093/mnras/stt1433. S2CID 54551449.
  6. ^ Gray, R.O.; Corbally, C.J.; Garrison, R.F.; McFadden, M.T.; Robinson, P.E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of stars earlier than M0 within 40 parsecs: The Northern Sample. I". Astronomical Journal. 126 (4): 2048–2059. arXiv:astro-ph/0308182. Bibcode:2003AJ....126.2048G. doi:10.1086/378365. S2CID 119417105.
  7. ^ a b c McCook, G. P.; Sion, E. M. (2014). "Entry for WD 0642-166". VizieR Online Data Catalog. CDS. Bibcode:2016yCat....102035M.
  8. ^ Gontcharov, G.A. (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.
  9. ^ a b van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  10. ^ Malkov, O. Yu. (December 2007). "Mass-luminosity relation of intermediate-mass stars". Monthly Notices of the Royal Astronomical Society. 382 (3): 1073–1086. Bibcode:2007MNRAS.382.1073M. doi:10.1111/j.1365-2966.2007.12086.x.
  11. ^ a b Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  12. ^ a b c d e Bond, Howard E.; Schaefer, Gail H.; Gilliland, Ronald L.; Holberg, Jay B.; Mason, Brian D.; Lindenblad, Irving W.; et al. (2017). "The Sirius system and its astrophysical puzzles: Hubble Space Telescope and ground-based astrometry". The Astrophysical Journal. 840 (2): 70. arXiv:1703.10625. Bibcode:2017ApJ...840...70B. doi:10.3847/1538-4357/aa6af8. S2CID 51839102.
  13. ^ a b c Liebert, James; Young, P. A.; Arnett, David; Holberg, J. B.; Williams, Kurtis A. (2005). "The Age and Progenitor Mass of Sirius B". The Astrophysical Journal. 630 (1): L69–L72. arXiv:astro-ph/0507523. Bibcode:2005ApJ...630L..69L. doi:10.1086/462419. S2CID 8792889.
  14. ^ a b Adelman, Saul J. (8–13 July 2004). "The Physical Properties of normal A stars". 2004. Poprad, Slovakia: Cambridge University Press. pp. 1–11.
    doi:10.1017/S1743921304004314
    .
    Bibcode: 2004IAUS..224....1A
    .     
  15. ^ Qiu, H. M.; Zhao, G.; Chen, Y. Q.; Li, Z. W. (2001). "The Abundance Patterns of Sirius and Vega". The Astrophysical Journal. 548 (2): 953–965. Bibcode:2001ApJ...548..953Q. doi:10.1086/319000.
  16. ^ Royer, F.; Gerbaldi, M.; Faraggiana, R.; Gómez, A. E. (2002). "Rotational velocities of A-type stars. I. Measurement of v sin i in the southern hemisphere". Astronomy and Astrophysics. 381 (1): 105–121. arXiv:astro-ph/0110490. Bibcode:2002A&A...381..105R. doi:10.1051/0004-6361:20011422. S2CID 13133418.
  17. ^ a b Holberg, J. B.; Barstow, M. A.; Bruhweiler, F. C.; Cruise, A. M.; Penny, A. J. (1998). "Sirius B: A New, More Accurate View". The Astrophysical Journal. 497 (2): 935–942. Bibcode:1998ApJ...497..935H. doi:10.1086/305489.
  18. ^ Sweeney, M.A. (1976). "Cooling times, luminosity functions and progenitor masses of degenerate dwarfs". Astronomy and Astrophysics. 49: 375–385. Bibcode:1976A&A....49..375S.
  19. ^ Hinckley, Richard Allen (1899). Star-names and Their Meanings. New York: G. E. Stechert. pp. 117–129.
  20. ^ Gingerich, O. (1987). "Zoomorphic astrolabes and the introduction of Arabic star names into Europe". Annals of the New York Academy of Sciences. 500 (1): 89–104. Bibcode:1987NYASA.500...89G. doi:10.1111/j.1749-6632.1987.tb37197.x. S2CID 84102853.
  21. ^ Singh, Nagendra Kumar (2002). Encyclopaedia of Hinduism, A Continuing Series. Anmol Publications PVT. LTD. p. 794. ISBN 81-7488-168-9.
  22. ^ Spahn, Mark; Hadamitzky, Wolfgang; Fujie-Winter, Kimiko (1996). The Kanji dictionary. Tuttle language library. Tuttle Publishing. p. 724. ISBN 0-8048-2058-9.
  23. ^ "Sirius A". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. සම්ප්‍රවේශය 20 October 2007.
  24. ^ "Sirius B". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. සම්ප්‍රවේශය 23 October 2007.

භාහිර සබැඳි

සංස්කරණය
 
dog days , යන්න නිදහස් ශබ්දකෝෂය වන වික්ෂනරිය දී සොයා බලන්න.
 
Sirius හා සබැඳි මාධ්‍ය විකිමාධ්‍ය කොමන්ස් හි ඇත.

Coordinates:   06h 45m 08.9173s, −16° 42′ 58.017″

"https://si.wikipedia.org/w/index.php?title=සිරියස්&oldid=681240#Sirius_B" වෙතින් සම්ප්‍රවේශනය කෙරිණි