Epsilon Eridani

Epsilon Eridani
	Epsilon Eridani'nin Eridanus takımyıldızındaki konumu.
Gözlem verisi; Dönem J2000.0 Ekinoks J2000.0
Takımyıldız	Eridanus
Sağ açıklık (α)	03sa 32d 55.84496s
Dik açıklık (δ)	−09° 27′ 29.7312″
Görünür büyüklük (V)	3.736
Sınıflandırma
Tayfsal sınıf	K2V
U−B renk ölçeği	+0.571
B−V renk ölçeği	+0.887
Değişen yıldız tipi	BY Dra
Astrometri
Dikey hız ()	+15.5 ± 0.9 km/s
Özdevinim (μ)	RA: −975.17 mys/y ; Dec.: 19.49 mys/y
Iraklık açısı (π)	=311.37 ± 0.1 mys
Uzaklık	10.475 ± 0.003 Iy; (3.212 ± 0.001 pc)
Mutlak büyüklük (V)	6.19
Özellikler
Kütle (m)	0.82 ± 0.02 M☉
Yarıçap (r)	0.735 ± 0.005 R☉
Aydınlatma gücü	0.34 L⊙
Sıcaklık	5,084 ± 5.9 K
Metallik [Fe/H]	−0.13 ± 0.04
Dönüş süresi	11.2 gün
Dönüş hızı ()	2.4 ± 0.5 km/s
Yaş	400−800
Katalog belirtmeleri
	Ran, 18 Eridani, BD -09°697, GCTP 742.00, GJ 144, HD 22049, HIP 16537, HR 1084, LHS 1557, SAO 130564, WDS 03330-0928.

Sayfanın 3 Aralık 2020 tarihinde onaylanmış olan kontrol edilmiş bir sürümü, bu revizyonu temel almıştır.

Epsilon Eridani (ε Eri, ε Eridani), Eridanus takımyıldızında yer alan bir yıldızdır.

Ayrıca bakınız

Yakın yıldızlar dizini

Kaynakça

^ ^a ^b ^c ^d van Leeuwen, Floor (Kasım 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2), ss. 653-664, arXiv:0708.1752v1 $2, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. Note: see VizieR catalogue I/311 5 Aralık 2012 tarihinde Archive.is sitesinde arşivlendi.
^ ^a ^b ^c Cousins, A. W. J. (1984), "Standardization of Broadband Photometry of Equatorial Standards", South African Astronomical Observatory Circulars, 8 (59), Bibcode:1984SAAOC...8...59C.
^ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (Temmuz 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), ss. 161-170, arXiv:astro-ph/0603770 $2, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
^ ^a ^b "V* eps Eri – variable of BY Dra type", Centre de Données astronomiques de Strasbourg, SIMBAD, erişim tarihi: 15 Nisan 2016.
^ "GCVS query=eps Eri", General Catalog of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia, erişim tarihi: 15 Nisan 2016.
^ Evans, D. S.; Batten, Alan Henry; Heard, John Frederick (20–24 Haziran 1966), "The revision of the general catalogue of radial velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, International Astronomical Union, 30, s. 57, Bibcode:1967IAUS...30...57E.
^ Benedict, G. Fritz; McArthur, Barbara E.; Gatewood, George; Nelan, Edmund; Cochran, William D.; Hatzes, Artie; Endl, Michael; Wittenmyer, Robert; Baliunas, Sallie L.; Walker, Gordon A. H.; Yang, Stephenson; Kürster, Martin; Els, Sebastian; Paulson, Diane B. (Kasım 2006), "The extrasolar planet e Eridani b – orbit and mass", The Astronomical Journal, 132 (5), ss. 2206-2218, arXiv:astro-ph/0610247 $2, Bibcode:2006AJ....132.2206B, doi:10.1086/508323.
^ Staff (8 Haziran 2007), The one hundred nearest star systems, Research Consortium On Nearby Stars, 12 Kasım 2007 tarihinde kaynağından arşivlendi, erişim tarihi: 15 Nisan 2016
^ Gonzalez, G.; Carlson, M. K.; Tobin, R. W. (Nisan 2010), "Parent stars of extrasolar planets – X. Lithium abundances and v sini revisited", Monthly Notices of the Royal Astronomical Society, 403 (3), ss. 1368-1380, arXiv:0912.1621 $2, Bibcode:2010MNRAS.403.1368G, doi:10.1111/j.1365-2966.2009.16195.x. See table 3.
^ Baines, Ellyn K.; Armstrong, J. Thomas (2011), "Confirming Fundamental Parameters of the Exoplanet Host Star epsilon Eridani Using the Navy Optical Interferometer", The Astrophysical Journal, cilt 748, s. 72, arXiv:1112.0447 $2, Bibcode:2012ApJ...748...72B, doi:10.1088/0004-637X/748/1/72.
^ Demory, B.-O.; Ségransan, D.; Forveille, T.; Queloz, D.; Beuzit, J.-L.; Delfosse, X.;; di Folco, E.; Kervella, P.; Le Bouquin, J.-B.; Perrier, C.; Benisty, M.; Duvert, G.; Hofmann, K.-H.; Lopez, B.; Petrov, R. (Ekim 2009), "Mass-radius relation of low and very low-mass stars revisited with the VLTI", Astronomy and Astrophysics, 505 (1), ss. 205-215, arXiv:0906.0602 $2, Bibcode:2009A&A...505..205D, doi:10.1051/0004-6361/200911976. See Table B.1
^ Saumon, D.; Hubbard, W. B.; Burrows, A.; Guillot6, T.; Lunine, J. I.; Chabrier, G. (Nisan 1996), "A theory of extrasolar giant planets", The Astrophysical Journal, cilt 460, s. 993, arXiv:astro-ph/9510046 $2, Bibcode:1996ApJ...460..993S, doi:10.1086/177027. See Table A1, p. 21.
^ Kovtyukh, V. V.; Soubiran, C.; Belik, S. I.; Gorlova, N. I. (Aralık 2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics, 411 (3), ss. 559-564, arXiv:astro-ph/0308429 $2, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378.
^ Santos, N. C.; Israelian, G.; Mayor, M. (Mart 2004), "Spectroscopic [Fe/H] for 98 extra-solar planet-host stars: Exploring the probability of planet formation", Astronomy and Astrophysics, 415 (3), ss. 1153-1166, arXiv:astro-ph/0311541 $2, Bibcode:2004A&A...415.1153S, doi:10.1051/0004-6361:20034469. —the percentage of iron is given by ${\begin{smallmatrix}10^{-0.13}=0.74\end{smallmatrix}}$ , or 74%
^ ^a ^b Fröhlich, H.-E. (Aralık 2007), "The differential rotation of Epsilon Eri from MOST data", Astronomische Nachrichten, 328 (10), ss. 1037-1039, arXiv:0711.0806 $2, Bibcode:2007AN....328.1037F, doi:10.1002/asna.200710876.
^ Janson, Markus; Quanz, Sascha P.; Carson, Joseph C.; Thalmann, Christian; Lafrenière, David; Amara, Adam (Şubat 2015), "High-contrast imaging with Spitzer: deep observations of Vega, Fomalhaut, and ε Eridani", Astronomy & Astrophysics, cilt 574, s. 10, arXiv:1412.4816 $2, Bibcode:2015A&A...574A.120J, doi:10.1051/0004-6361/201424944, A120.

Dış bağlantılar

Marcy, G.; Butler, P.; Vogt, S.; Fischer, D. (12 Şubat 2002), A Planet Around Epsilon Eridani?, Exoplanets.org, 9 Temmuz 2011 tarihinde kaynağından arşivlendi, erişim tarihi: 15 Nisan 2016.
Staff (8 Temmuz 1998), "Astronomers discover a nearby star system just like our own Solar System", Joint Astronomy Centre, The University of Hawaii, 8 Mayıs 2011 tarihinde kaynağından arşivlendi, erişim tarihi: 15 Nisan 2016.
Anonymous, "Epsilon Eridani", SolStation, The Sol Company, erişim tarihi: 28 Kasım 2008.
Tirion, Wil (2001), "Sky Map: Epsilon Eridani", Planet Quest, Cambridge, U.K.: Cambridge University Press, 26 Temmuz 2011 tarihinde kaynağından arşivlendi, erişim tarihi: 15 Nisan 2016.

[aaa474_2_653-1] van Leeuwen, Floor (Kasım 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2), ss. 653-664, arXiv:0708.1752v1 $2, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. Note: see VizieR catalogue I/311 5 Aralık 2012 tarihinde Archive.is sitesinde arşivlendi.

[saaoc8_59-2] Cousins, A. W. J. (1984), "Standardization of Broadband Photometry of Equatorial Standards", South African Astronomical Observatory Circulars, 8 (59), Bibcode:1984SAAOC...8...59C.

[aj132_1_161-3] Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (Temmuz 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), ss. 161-170, arXiv:astro-ph/0603770 $2, Bibcode:2006AJ....132..161G, doi:10.1086/504637.

[SIMBAD-4] "V* eps Eri – variable of BY Dra type", Centre de Données astronomiques de Strasbourg, SIMBAD, erişim tarihi: 15 Nisan 2016.

[gcvs-5] "GCVS query=eps Eri", General Catalog of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia, erişim tarihi: 15 Nisan 2016.

[rgcrv66-6] Evans, D. S.; Batten, Alan Henry; Heard, John Frederick (20–24 Haziran 1966), "The revision of the general catalogue of radial velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, International Astronomical Union, 30, s. 57, Bibcode:1967IAUS...30...57E.

[aj132_2206-7] Benedict, G. Fritz; McArthur, Barbara E.; Gatewood, George; Nelan, Edmund; Cochran, William D.; Hatzes, Artie; Endl, Michael; Wittenmyer, Robert; Baliunas, Sallie L.; Walker, Gordon A. H.; Yang, Stephenson; Kürster, Martin; Els, Sebastian; Paulson, Diane B. (Kasım 2006), "The extrasolar planet e Eridani b – orbit and mass", The Astronomical Journal, 132 (5), ss. 2206-2218, arXiv:astro-ph/0610247 $2, Bibcode:2006AJ....132.2206B, doi:10.1086/508323.

[RECONS-8] Staff (8 Haziran 2007), The one hundred nearest star systems, Research Consortium On Nearby Stars, 12 Kasım 2007 tarihinde kaynağından arşivlendi, erişim tarihi: 15 Nisan 2016

[mnras403_3_1368-9] Gonzalez, G.; Carlson, M. K.; Tobin, R. W. (Nisan 2010), "Parent stars of extrasolar planets – X. Lithium abundances and v sini revisited", Monthly Notices of the Royal Astronomical Society, 403 (3), ss. 1368-1380, arXiv:0912.1621 $2, Bibcode:2010MNRAS.403.1368G, doi:10.1111/j.1365-2966.2009.16195.x. See table 3.

[Baines-10] Baines, Ellyn K.; Armstrong, J. Thomas (2011), "Confirming Fundamental Parameters of the Exoplanet Host Star epsilon Eridani Using the Navy Optical Interferometer", The Astrophysical Journal, cilt 748, s. 72, arXiv:1112.0447 $2, Bibcode:2012ApJ...748...72B, doi:10.1088/0004-637X/748/1/72.

[aaa505_1_205-11] Demory, B.-O.; Ségransan, D.; Forveille, T.; Queloz, D.; Beuzit, J.-L.; Delfosse, X.;; di Folco, E.; Kervella, P.; Le Bouquin, J.-B.; Perrier, C.; Benisty, M.; Duvert, G.; Hofmann, K.-H.; Lopez, B.; Petrov, R. (Ekim 2009), "Mass-radius relation of low and very low-mass stars revisited with the VLTI", Astronomy and Astrophysics, 505 (1), ss. 205-215, arXiv:0906.0602 $2, Bibcode:2009A&A...505..205D, doi:10.1051/0004-6361/200911976. See Table B.1

[apj460_993-12] Saumon, D.; Hubbard, W. B.; Burrows, A.; Guillot6, T.; Lunine, J. I.; Chabrier, G. (Nisan 1996), "A theory of extrasolar giant planets", The Astrophysical Journal, cilt 460, s. 993, arXiv:astro-ph/9510046 $2, Bibcode:1996ApJ...460..993S, doi:10.1086/177027. See Table A1, p. 21.

[aaa411_3_559-13] Kovtyukh, V. V.; Soubiran, C.; Belik, S. I.; Gorlova, N. I. (Aralık 2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics, 411 (3), ss. 559-564, arXiv:astro-ph/0308429 $2, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378.

[aaa415-14] Santos, N. C.; Israelian, G.; Mayor, M. (Mart 2004), "Spectroscopic [Fe/H] for 98 extra-solar planet-host stars: Exploring the probability of planet formation", Astronomy and Astrophysics, 415 (3), ss. 1153-1166, arXiv:astro-ph/0311541 $2, Bibcode:2004A&A...415.1153S, doi:10.1051/0004-6361:20034469. —the percentage of iron is given by ${\begin{smallmatrix}10^{-0.13}=0.74\end{smallmatrix}}$ , or 74%

[an328_10-15] Fröhlich, H.-E. (Aralık 2007), "The differential rotation of Epsilon Eri from MOST data", Astronomische Nachrichten, 328 (10), ss. 1037-1039, arXiv:0711.0806 $2, Bibcode:2007AN....328.1037F, doi:10.1002/asna.200710876.

[Janson2015-16] Janson, Markus; Quanz, Sascha P.; Carson, Joseph C.; Thalmann, Christian; Lafrenière, David; Amara, Adam (Şubat 2015), "High-contrast imaging with Spitzer: deep observations of Vega, Fomalhaut, and ε Eridani", Astronomy & Astrophysics, cilt 574, s. 10, arXiv:1412.4816 $2, Bibcode:2015A&A...574A.120J, doi:10.1051/0004-6361/201424944, A120.

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Gözlem verisi Dönem J2000.0 Ekinoks J2000.0
Epsilon Eridani'nin Eridanus takımyıldızındaki konumu.
Takımyıldız	Eridanus
Sağ açıklık ( $α$ )	03^sa 32^d 55.84496^s^[1]
Dik açıklık ( $δ$ )	−09° 27′ 29.7312″^[1]
Görünür büyüklük (V)	3.736^[2]
Sınıflandırma
Tayfsal sınıf	K2V^[3]
U−B renk ölçeği	+0.571^[2]
B−V renk ölçeği	+0.887^[2]
Değişen yıldız tipi	BY Dra^[4]^[5]
Astrometri
Dikey hız ( $v_{r}$ )	+15.5 ± 0.9^[6] km/s
Özdevinim ( $μ$ )	RA: −975.17^[1] mys/y Dec.: 19.49^[1] mys/y
Iraklık açısı ( $π$ )	=311.37 ± 0.1^[7] mys
Uzaklık	10.475 ± 0.003 Iy (3.212 ± 0.001 pc)
Mutlak büyüklük (V)	6.19^[8]
Özellikler
Kütle ( $m$ )	0.82 ± 0.02^[9]^[10] `M`_☉
Yarıçap ( $r$ )	0.735 ± 0.005^[11] `R`_☉
Aydınlatma gücü	0.34^[12] L_⊙
Sıcaklık	5,084 ± 5.9^[13] K
Metallik [Fe/H]	−0.13 ± 0.04^[14]
Dönüş süresi	11.2 gün^[15]
Dönüş hızı ( $v_{\mathrm {e} }\cdot \sin i$ )	2.4 ± 0.5^[15] km/s
Yaş	400−800^[16]
Katalog belirtmeleri
Ran, 18 Eridani, BD -09°697, GCTP 742.00, GJ 144, HD 22049, HIP 16537, HR 1084, LHS 1557, SAO 130564, WDS 03330-0928.^[4]