Red clump star in the constellation Eridanus
Upsilon1 Eridani (υ1 Eri ) is a single star in the constellation Eridanus . It has an apparent visual magnitude is 4.51,[2] parallax method ,[1] light years .
This is an evolved red clump [8] giant star with a stellar classification of K0III-IV.[3] angular diameter , after correction for limb darkening , is ± 0.02 mas [9] radius of the Sun .[5] [4] Sun's mass and radiates 24 times the solar luminosity from its outer atmosphere at an effective temperature of 4,941 K.[4]
References
^ a b c d e f van Leeuwen, F. (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 . ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data , SIMBAD , Bibcode :1986EgUBV........0M . ^ a b Gray, R. O.; et al. (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 , S2CID 119476992 . ^ a b c d e f g h i Luck, R. Earle; Heiter, Ulrike (June 2007), "Giants in the Local Region", The Astronomical Journal , 133 (6): 2464–2486, Bibcode :2007AJ....133.2464L , doi :10.1086/513194 ^ a b Lang, Kenneth R. (2006), Astrophysical formulae Birkhäuser , ISBN 3-540-29692-1 * ) is given by:
2
⋅
R
∗
=
(
39.0
⋅
1.74
⋅
10
−
3
)
AU
0.0046491
AU
/
R
⨀
≈
14.6
⋅
R
⨀
{\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(39.0\cdot 1.74\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 14.6\cdot R_{\bigodot }\end{aligned}}}
^ Hekker, S.; Meléndez, J. (2007). "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters". Astronomy and Astrophysics . 475 (3): 1003. arXiv :0709.1145 Bibcode :2007A&A...475.1003H . doi :10.1051/0004-6361:20078233 . S2CID 10436552 . ^ "* ups01 Eri" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2016-10-13 .{{cite web }}: CS1 maint: postscript (link )^ Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal , 539 (2): 732–741, arXiv :astro-ph/0003329 Bibcode :2000ApJ...539..732A , doi :10.1086/309278 , S2CID 16673121 . ^ Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics , 431 (2): 773–777, Bibcode :2005A&A...431..773R , doi :10.1051/0004-6361:20042039
This page was last edited on 12 November 2022, at 09:43
This page was last edited on 12 November 2022, at 09:43