Sejarah pencerapan Epsilon Eridani

Atas, bahagian utara buruj Eridanus ditandakan dengan hijau, manakala garisan biru menunjukkan Orion. Bawah, pandangan yang diperbesarkan dalam kotak putih menunjukkan Epsilon Eridani di persimpangan dua garis.

Pengkatalogan

Pengesana penghampiran

Berdasarkan pemerhatian antara 1800 dan 1880, Epsilon Eridani didapati mempunyai gerakan benar yang besar merentasi sfera samawi, yang dianggarkan pada halaju sudut tiga arkasaat setiap tahun. [19] Gerakan ini menunjukkan ia agak dekat dengan Matahari,[20] menjadikannya bintang tumpuan bagi tujuan pengukuran paralaks trigonometri . Proses ini melibatkan rakaman kedudukan Epsilon Eridani semasa Bumi bergerak mengelilingi Matahari, yang membolehkan jarak bintang dianggar. [19] Dari 1881-1883, ahli astronomi Amerika William L. Elkin menggunakan heliometer di Balai Cerap Diraja Tanjung Harapan, Afrika Selatan untuk membandingkan kedudukan Epsilon Eridani dengan dua bintang yang berdekatan. Dari pemerhatian ini, pengukuran paralaks 0.14 ± 0.02 arkasaat telah dikira [21] [22]. Menjelang 1917, pemerhati telah memperbaiki anggaran paralaks mereka kepada 0.317 arkasaat.[23] Nilai moden bagi 0.3109 arkasaat adalah bersamaan dengan jarak kira-kira 10.50 ly (3.22 parsec).[1]

Penemuan keliling najam

Catatan

  1. ↑ From Epsilon Eridani, the Sun would appear on the diametrically opposite side of the sky at the coordinates RA=15j 32m 55.84496s, Dec=09° 27′ 29.7312″, which is located near Alpha Serpentis. The absolute magnitude of the Sun is 4.83,[a] so, at a distance of 3.212 parsecs, the Sun would have an apparent magnitude: m = M v + 5 ⋅ log 10 ⁡ ( 3.212 / 10 ) + A V = 2.36 {\displaystyle {\begin{smallmatrix}m=M_{v}+5\cdot \log _{10}(3.212/10)+A_{V}=2.36\end{smallmatrix}}} ,[b] assuming negligible extinction (AV) for a nearby star.
    Ref.:
    1. Binney, James; Merrifield, Michael (1998), Galactic Astronomy, Princeton University Press, m/s. 56, ISBN 0691025657 
    2. Karttunen, Hannu; dll. (2013), Fundamental Astronomy, Springer Science & Business Media, m/s. 103, ISBN 3662032155 

Rujukan

  1. 1 2 3 4 5 van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752v1 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.  Note: see VizieR catalogue I/311.
  2. 1 2 3 Cousins, A. W. J. (1984), "Standardization of Broadband Photometry of Equatorial Standards", South African Astronomical Observatory Circulars, 8: 59, Bibcode:1984SAAOC...8...59C. 
  3. ↑ Gray, R. O.; dll. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770 , Bibcode:2006AJ....132..161G, doi:10.1086/504637. 
  4. 1 2 3 4 "V* eps Eri – variable of BY Dra type", SIMBAD, Centre de Données astronomiques de Strasbourg, dicapai 2010-11-05. 
  5. 1 2 3 Cutri, R. M.; dll. (June 2003), "The IRSA 2MASS all-sky point source catalog, NASA/IPAC infrared science archive", The IRSA 2MASS All-Sky Point Source Catalog, Bibcode:2003tmc..book.....C. 
  6. ↑ "GCVS query=eps Eri", General Catalog of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia, dicapai 2009-05-20. 
  7. ↑ Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick, para penyunting, "The revision of the general catalogue of radial velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, 30, m/s. 57, Bibcode:1967IAUS...30...57E. Selenggaraan CS1: Menggunakan parameter editors (link)
  8. ↑ Benedict, G. Fritz; dll. (November 2006), "The extrasolar planet e Eridani b – orbit and mass", The Astronomical Journal, 132 (5): 2206–2218, arXiv:astro-ph/0610247 , Bibcode:2006AJ....132.2206B, doi:10.1086/508323. 
  9. ↑ Staff (June 8, 2007), The one hundred nearest star systems, Research Consortium On Nearby Stars, dicapai 2007-11-29 
  10. ↑ Di Folco, E.; dll. (November 2004), "VLTI near-IR interferometric observations of Vega-like stars. Radius and age of α PsA, β Leo, β Pic, ε Eri and τ Cet", Astronomy and Astrophysics, 426 (2): 601–617, Bibcode:2004A&A...426..601D, doi:10.1051/0004-6361:20047189. 
  11. 1 2 Hatzes, Artie P.; dll. (December 2000), "Evidence for a long-period planet orbiting ε Eridani", The Astrophysical Journal, 544 (2): L145–L148, arXiv:astro-ph/0009423 , Bibcode:2000ApJ...544L.145H, doi:10.1086/317319. 
  12. ↑ Schneider, Jean, "Star: Eps Eridani", Extrasolar Planets Encyclopaedia, Paris Observatory, dicapai 2010-07-04. 
  13. ↑ Buccino, A. P.; Mauas, P. J. D.; Lemarchand, G. A. (June 2003), R. Norris and F. Stootman, para penyunting, "UV Radiation in Different Stellar Systems", Bioastronomy 2002: Life Among the Stars, Proceedings of IAU Symposium #213, San Francisco: Astronomical Society of the Pacific, 213, m/s. 97, Bibcode:2004IAUS..213...97B. Selenggaraan CS1: Menggunakan parameter editors (link)
  14. ↑ Aguilar, David A.; Pulliam, Christine (October 27, 2008), Solar System's young twin has two asteroid belts, Harvard-Smithsonian Center for Astrophysics, dicapai 2008-11-10. 
  15. ↑ Backman, D.; dll. (2008), "Epsilon Eridani's planetary debris disk: structure and dynamics based on Spitzer and CSO observations", The Astrophysical Journal, 690 (2): 1522–1538, arXiv:0810.4564 , Bibcode:2009ApJ...690.1522B, doi:10.1088/0004-637X/690/2/1522. 
  16. ↑ Potemine, Igor Yu. (April 12, 2010). "Transit of Luyten 726-8 within 1 ly from Epsilon Eridani". arXiv:1004.1557 [astro-ph.SR].
  17. ↑ Villard, Ray (December 2007), "Does life exist on this exoplanet?", Astronomy, 35 (12): 44–47, Bibcode:2007Ast....35l..44V. 
  18. ↑ Boyle, Alan (2009), "The case for Pluto: how a little planet made a big difference", The Case for Pluto: How a Little Planet Made a Big Difference by Alan Boyle. Wiley, Hoboken, New Jersey: John Wiley and Sons: 191, Bibcode:2009cphl.book.....B, ISBN 0-470-50544-3. 
  19. 1 2 Gill, David; Elkin, W. L. (1884), Heliometer determinations of stellar parallaxes in the southern hemisphere, London, U.K.: The Royal Astronomical Society, m/s. 174–180. 
  20. ↑ Belkora, Leila (2002), Minding the heavens: the story of our discovery of the Milky Way, London, U.K.: CRC Press, m/s. 151, ISBN 0-7503-0730-7. 
  21. ↑ Gill, David (1893), Heliometer observations for determination of stellar parallax, London: Eyre and Spottiswoode, m/s. xvi. 
  22. ↑ Gill, David (1884), "The fixed stars", Nature, 30 (763): 156–159, Bibcode:1884Natur..30..156., doi:10.1038/030156a0. 
  23. ↑ Adams, W. S.; Joy, A. H. (1917), "The luminosities and parallaxes of five hundred stars", The Astrophysical Journal, 46: 313–339, Bibcode:1917ApJ....46..313A, doi:10.1086/142369. 
  24. Fröhlich, H.-E. (December 2007), "The differential rotation of Epsilon Eri from MOST data", Astronomische Nachrichten, 328 (10): 1037–1039, arXiv:0711.0806 , Bibcode:2007AN....328.1037F, doi:10.1002/asna.200710876. 

Rujukan

WikiPedia: Epsilon Eridani http://books.google.com/?id=NpMoAAAAYAAJ&pg=PA174 http://books.google.com/?id=arYYRoYjKacC&pg=PA174 http://books.google.com/books?id=qHJKAAAAYAAJ http://www.solstation.com/stars/eps-erid.htm http://irsa.ipac.caltech.edu/applications/Gator/ http://www.astro.gsu.edu/RECONS/TOP100.posted.htm http://adsabs.harvard.edu/abs/1884Natur..30..156. http://adsabs.harvard.edu/abs/1917ApJ....46..313A http://adsabs.harvard.edu/abs/1967IAUS...30...57E http://adsabs.harvard.edu/abs/1984SAAOC...8...59C