From Wikipedia, the free encyclopedia
Xi Arietis
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Aries
Right ascension 02h 24m 49.05655s [1]
Declination +10° 36′ 38.0236″ [1]
Apparent magnitude (V) +5.46 [2]
Characteristics
Spectral type B7 IV [3]
U−B color index −0.48 [2]
B−V color index −0.10 [2]
Astrometry
Proper motion (μ) RA: +20.09 [1]  mas/ yr
Dec.: −14.79 [1]  mas/ yr
Parallax (π)3.74 ± 0.29  mas [1]
Distance870 ± 70  ly
(270 ± 20  pc)
Absolute magnitude (MV)−0.43 [4]
Details
Mass3.9 [5]  M
Surface gravity (log g)3.897±0.017 [5]  cgs
Temperature13627±100 [5]  K
Rotational velocity (v sin i)164±8 [5] km/s
Age195 [4]  Myr
Other designations
ξ Ari, ψ Ceti, 24 Arietis, BD+09°316, FK5 2164, HD 14951, HIP 11249, HR 702, SAO 92932 [6]
Database references
SIMBAD data

Xi Arietis, Latinized from ξ Arietis, is the Bayer designation for a binary star [7] system in the northern constellation of Aries. It has an apparent visual magnitude of 5.46, [2] and so is dimly visible to the naked eye. Based upon an annual parallax shift of 3.74±0.29  mas as seen from Earth, it is 872 ± 68 light-years (267 ± 21 parsecs) distant from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.24 due to interstellar dust. [4]

This is a double-lined spectroscopic binary. [7] The spectrum matches a stellar classification of B7 IV, [3] which would indicate a subgiant star that has exhausted the supply of hydrogen at its core and is in the process of evolving into a giant star. Xi Arietis was once a designation for Psi Ceti (ψ Cet, ψ Ceti). [8]

References

  1. ^ a b c d e 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.
  2. ^ a b c d Crawford, D. L.; et al. (1971), "Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere", The Astronomical Journal, 76: 1058, Bibcode: 1971AJ.....76.1058C, doi: 10.1086/111220.
  3. ^ a b Lesh, Janet Rountree (December 1968), "The Kinematics of the Gould Belt: an Expanding Group?", Astrophysical Journal Supplement, 17: 371, Bibcode: 1968ApJS...17..371L, doi: 10.1086/190179.
  4. ^ a b c Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv: 1606.09028, Bibcode: 2012AstL...38..694G, doi: 10.1134/S1063773712110035, S2CID  119108982.
  5. ^ a b c d Huang, Wenjin; et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal, 722 (1): 605–619, arXiv: 1008.1761, Bibcode: 2010ApJ...722..605H, doi: 10.1088/0004-637X/722/1/605, S2CID  118532653.
  6. ^ "ksi Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-28.
  7. ^ a b Chini, R.; et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society, 424 (3): 1925, arXiv: 1205.5238, Bibcode: 2012MNRAS.424.1925C, doi: 10.1111/j.1365-2966.2012.21317.x, S2CID  119120749.
  8. ^ Ridpath, Ian, "Bayer's Uranometria and Bayer letters", Star Tales.
From Wikipedia, the free encyclopedia
Xi Arietis
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Aries
Right ascension 02h 24m 49.05655s [1]
Declination +10° 36′ 38.0236″ [1]
Apparent magnitude (V) +5.46 [2]
Characteristics
Spectral type B7 IV [3]
U−B color index −0.48 [2]
B−V color index −0.10 [2]
Astrometry
Proper motion (μ) RA: +20.09 [1]  mas/ yr
Dec.: −14.79 [1]  mas/ yr
Parallax (π)3.74 ± 0.29  mas [1]
Distance870 ± 70  ly
(270 ± 20  pc)
Absolute magnitude (MV)−0.43 [4]
Details
Mass3.9 [5]  M
Surface gravity (log g)3.897±0.017 [5]  cgs
Temperature13627±100 [5]  K
Rotational velocity (v sin i)164±8 [5] km/s
Age195 [4]  Myr
Other designations
ξ Ari, ψ Ceti, 24 Arietis, BD+09°316, FK5 2164, HD 14951, HIP 11249, HR 702, SAO 92932 [6]
Database references
SIMBAD data

Xi Arietis, Latinized from ξ Arietis, is the Bayer designation for a binary star [7] system in the northern constellation of Aries. It has an apparent visual magnitude of 5.46, [2] and so is dimly visible to the naked eye. Based upon an annual parallax shift of 3.74±0.29  mas as seen from Earth, it is 872 ± 68 light-years (267 ± 21 parsecs) distant from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.24 due to interstellar dust. [4]

This is a double-lined spectroscopic binary. [7] The spectrum matches a stellar classification of B7 IV, [3] which would indicate a subgiant star that has exhausted the supply of hydrogen at its core and is in the process of evolving into a giant star. Xi Arietis was once a designation for Psi Ceti (ψ Cet, ψ Ceti). [8]

References

  1. ^ a b c d e 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.
  2. ^ a b c d Crawford, D. L.; et al. (1971), "Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere", The Astronomical Journal, 76: 1058, Bibcode: 1971AJ.....76.1058C, doi: 10.1086/111220.
  3. ^ a b Lesh, Janet Rountree (December 1968), "The Kinematics of the Gould Belt: an Expanding Group?", Astrophysical Journal Supplement, 17: 371, Bibcode: 1968ApJS...17..371L, doi: 10.1086/190179.
  4. ^ a b c Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv: 1606.09028, Bibcode: 2012AstL...38..694G, doi: 10.1134/S1063773712110035, S2CID  119108982.
  5. ^ a b c d Huang, Wenjin; et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal, 722 (1): 605–619, arXiv: 1008.1761, Bibcode: 2010ApJ...722..605H, doi: 10.1088/0004-637X/722/1/605, S2CID  118532653.
  6. ^ "ksi Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-28.
  7. ^ a b Chini, R.; et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society, 424 (3): 1925, arXiv: 1205.5238, Bibcode: 2012MNRAS.424.1925C, doi: 10.1111/j.1365-2966.2012.21317.x, S2CID  119120749.
  8. ^ Ridpath, Ian, "Bayer's Uranometria and Bayer letters", Star Tales.

Videos

Youtube | Vimeo | Bing

Websites

Google | Yahoo | Bing

Encyclopedia

Google | Yahoo | Bing

Facebook