Langbahn Team – Weltmeisterschaft

HD 153053

HD 153053
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 00m 06.27939s[1]
Declination −54° 35′ 49.8371″[1]
Apparent magnitude (V) 5.65[2]
Characteristics
Spectral type A5 IV-V[3]
U−B color index 0.1
B−V color index +0.19[2]
Astrometry
Radial velocity (Rv)-20.2[4] km/s
Proper motion (μ) RA: -7.70[1] mas/yr
Dec.: -72.18[1] mas/yr
Parallax (π)19.30 ± 0.35 mas[1]
Distance169 ± 3 ly
(51.8 ± 0.9 pc)
Details
Mass1.8[5] M☉
Luminosity12.3[5] L☉
Temperature8,000[5] K
Rotational velocity (v sin i)102.8±0.7[6] km/s
Age420[5] Myr
Other designations
CPD−54° 7947, HD 153053, HIP 83187, HR 6297, SAO 244338.
Database references
SIMBADdata

HD 153053 is double star in the southern constellation of Ara. The brighter component is an A-type main sequence star that may be evolving into a subgiant.[3] It has a twelfth magnitude visual companion at an angular separation of 24.7″ along a position angle of 52°.[7] Mostly likely the two are isolated stars that happen to lie near the same line of sight.[8]

This star displays an excess emission of infrared radiation, suggesting the presence of a disk of dusty debris. This disk is orbiting at a radius of 49 AU from the host star.[5]

References

  1. ^ a b c d e 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.
  2. ^ a b Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
  3. ^ a b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H
  4. ^ 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. S2CID 119231169.
  5. ^ a b c d e Wyatt, M. C.; et al. (July 2007), "Steady State Evolution of Debris Disks around A Stars", The Astrophysical Journal, 663 (1): 365–382, arXiv:astro-ph/0703608, Bibcode:2007ApJ...663..365W, doi:10.1086/518404, S2CID 18883195.
  6. ^ Díaz, C. G.; et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum", Astronomy & Astrophysics, 531: A143, arXiv:1012.4858, Bibcode:2011A&A...531A.143D, doi:10.1051/0004-6361/201016386, S2CID 119286673
  7. ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
  8. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976


Quelle: http://en.wikipedia.org/wiki/HD_153053