Home • Search • Translate
From Wikipedia, the free encyclopedia
Pi Persei
Location of π Persei (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Perseus
Right ascension 02h 58m 45.66858s [1]
Declination +39° 39′ 45.8212″ [1]
Apparent magnitude (V) 4.70 [2]
Characteristics
Spectral type A2Vn [3]
U−B color index +0.12 [2]
B−V color index +0.06 [2]
Astrometry
Radial velocity (Rv)+14.2 [4] km/s
Proper motion (μ) RA: +26.224 [1]  mas/ yr
Dec.: −41.899 [1]  mas/ yr
Parallax (π)10.7797 ± 0.2794  mas [1]
Distance303 ± 8  ly
(93 ± 2  pc)
Absolute magnitude (MV)−0.21 [5]
Details
Mass2.07 [6]  M☉
Radius4.8 [7]  R☉
Luminosity170 [8]  L☉
Surface gravity (log g)3.53 [6]  cgs
Temperature9,290 [8]  K
Rotational velocity (v sin i)186 [8] km/s
Age272 [6]  Myr
Other designations
Gorgonea Secunda [9], π Per, 22 Persei, BD+39°681, FK5 2207, GC 3567, HD 18411, HIP 13879, HR 879, SAO 56047 [10]
Database references
SIMBAD data

π Persei, Latinized as Pi Persei, is a single [11] star in the northern constellation of Perseus. It has the traditional name Gorgonea Secunda /ɡɔːrɡəˈniːə sɪˈkʌndə/, the second of three Gorgons in the mythology of the hero Perseus. [12] This star has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.7. [2] It is located at a distance of approximately 303  light years from the Sun based on parallax, [1] and is moving further away with a radial velocity of +14 km/s. [4]

This object is an A-type main-sequence star with a stellar classification of A2Vn, [3] where the 'n' suffix indicates broad (nebulous) lines due to rapid rotation. It is spinning with a projected rotational velocity of 186 km/s, [8] which is creating an equatorial bulge that is 6% wider than the polar radius. [13] The star is 272 [6] million years old with double the mass of the Sun. [6] It has 4.8 [7] times the Sun's radius and is radiating 170 [8] times the luminosity of the Sun from its photosphere at an effective temperature of 9,290 K. [8]

References

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode: 2002yCat.2237....0D.
  3. ^ a b Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement. 99: 135. Bibcode: 1995ApJS...99..135A. doi: 10.1086/192182.
  4. ^ a b Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode: 1953GCRV..C......0W. ISBN  9780598216885. LCCN  54001336.
  5. ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID  119257644. Vizier catalog entry
  6. ^ a b c d e David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv: 1501.03154. Bibcode: 2015ApJ...804..146D. doi: 10.1088/0004-637X/804/2/146. S2CID  33401607. Vizier catalog entry
  7. ^ a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv: astro-ph/9911002. Bibcode: 1999A&A...352..555A. Vizier catalog entry
  8. ^ a b c d e f Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv: 1201.2052. Bibcode: 2012A&A...537A.120Z. doi: 10.1051/0004-6361/201117691. S2CID  55586789. Vizier catalog entry
  9. ^ Allen, Richard Hinckley (1899). Star-names and Their Meanings. G.E. Stechert. p.  334.
  10. ^ "pi Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-12.
  11. ^ 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.
  12. ^ Kaler, James B. (November 21, 2014). "Pi Persei". STARS. Retrieved 2019-10-12.
  13. ^ van Belle, Gerard T. (March 2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review. 20 (1): 51. arXiv: 1204.2572. Bibcode: 2012A&ARv..20...51V. doi: 10.1007/s00159-012-0051-2. S2CID  119273474.
Retrieved from " https://en.wikipedia.org/?title=Pi_Persei&oldid=1170235964"
From Wikipedia, the free encyclopedia
Pi Persei
Location of π Persei (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Perseus
Right ascension 02h 58m 45.66858s [1]
Declination +39° 39′ 45.8212″ [1]
Apparent magnitude (V) 4.70 [2]
Characteristics
Spectral type A2Vn [3]
U−B color index +0.12 [2]
B−V color index +0.06 [2]
Astrometry
Radial velocity (Rv)+14.2 [4] km/s
Proper motion (μ) RA: +26.224 [1]  mas/ yr
Dec.: −41.899 [1]  mas/ yr
Parallax (π)10.7797 ± 0.2794  mas [1]
Distance303 ± 8  ly
(93 ± 2  pc)
Absolute magnitude (MV)−0.21 [5]
Details
Mass2.07 [6]  M☉
Radius4.8 [7]  R☉
Luminosity170 [8]  L☉
Surface gravity (log g)3.53 [6]  cgs
Temperature9,290 [8]  K
Rotational velocity (v sin i)186 [8] km/s
Age272 [6]  Myr
Other designations
Gorgonea Secunda [9], π Per, 22 Persei, BD+39°681, FK5 2207, GC 3567, HD 18411, HIP 13879, HR 879, SAO 56047 [10]
Database references
SIMBAD data

π Persei, Latinized as Pi Persei, is a single [11] star in the northern constellation of Perseus. It has the traditional name Gorgonea Secunda /ɡɔːrɡəˈniːə sɪˈkʌndə/, the second of three Gorgons in the mythology of the hero Perseus. [12] This star has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.7. [2] It is located at a distance of approximately 303  light years from the Sun based on parallax, [1] and is moving further away with a radial velocity of +14 km/s. [4]

This object is an A-type main-sequence star with a stellar classification of A2Vn, [3] where the 'n' suffix indicates broad (nebulous) lines due to rapid rotation. It is spinning with a projected rotational velocity of 186 km/s, [8] which is creating an equatorial bulge that is 6% wider than the polar radius. [13] The star is 272 [6] million years old with double the mass of the Sun. [6] It has 4.8 [7] times the Sun's radius and is radiating 170 [8] times the luminosity of the Sun from its photosphere at an effective temperature of 9,290 K. [8]

References

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode: 2002yCat.2237....0D.
  3. ^ a b Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement. 99: 135. Bibcode: 1995ApJS...99..135A. doi: 10.1086/192182.
  4. ^ a b Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode: 1953GCRV..C......0W. ISBN  9780598216885. LCCN  54001336.
  5. ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID  119257644. Vizier catalog entry
  6. ^ a b c d e David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv: 1501.03154. Bibcode: 2015ApJ...804..146D. doi: 10.1088/0004-637X/804/2/146. S2CID  33401607. Vizier catalog entry
  7. ^ a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv: astro-ph/9911002. Bibcode: 1999A&A...352..555A. Vizier catalog entry
  8. ^ a b c d e f Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv: 1201.2052. Bibcode: 2012A&A...537A.120Z. doi: 10.1051/0004-6361/201117691. S2CID  55586789. Vizier catalog entry
  9. ^ Allen, Richard Hinckley (1899). Star-names and Their Meanings. G.E. Stechert. p.  334.
  10. ^ "pi Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-12.
  11. ^ 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.
  12. ^ Kaler, James B. (November 21, 2014). "Pi Persei". STARS. Retrieved 2019-10-12.
  13. ^ van Belle, Gerard T. (March 2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review. 20 (1): 51. arXiv: 1204.2572. Bibcode: 2012A&ARv..20...51V. doi: 10.1007/s00159-012-0051-2. S2CID  119273474.
Retrieved from " https://en.wikipedia.org/?title=Pi_Persei&oldid=1170235964"

Videos

Youtube | Vimeo | Bing

Websites

Google | Yahoo | Bing

Encyclopedia

Google | Yahoo | Bing

Facebook




Top Of Page

Home • Search • Translate

© CSE