KSw 71

Last updated

KSw 71
KSw 71ArtistConcept.png
Artist's impression of KSw 71
Observation data
Epoch J2000       Equinox J2000
Constellation Lyra [1]
Right ascension 19h 14m 17.2632s [2]
Declination +42° 36′ 31.619″ [2]
Characteristics
Spectral type K0-2 IV-III [3]
Astrometry
Proper motion (μ)RA: −0.309 mas/yr [2]
Dec.: +6.073 mas/yr [2]
Parallax (π)3.1267±0.0170  mas [2]
Distance 1,043 ± 6  ly
(320 ± 2  pc)
Details
Mass 0.8257 [4]   M☉
Radius 10.5 [3]   R☉
Surface gravity (log g)4.38 [4]   cgs
Temperature 4,967 [4]   K
Rotation 5.22 days [3]
Rotational velocity (v sin i)98.6 – 116 [3]  km/s
Other designations
2MASS  J19141726+4236315, KIC  7107762
Database references
SIMBAD data
KIC data

KSw 71 is a rapidly-spinning star in the constellation of Lyra. It is thought to have formed after two stars in a close binary system merged; its rotation has deformed it into an oblate spheroid shape. KSw 71 was discovered, alongside other pumpkin-shaped stars by NASA's Kepler and Swift missions and produces X-rays at more than 100 times the peak levels ever seen from the Sun. [5]

18 "pumpkin stars" have been discovered, [6] including this one.

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 Howell, Steve B.; Mason, Elena; Boyd, Patricia; Smith, Krista Lynne; Gelino, Dawn M. (2016). "Rapidly Rotating, X-Ray Bright Stars in the Kepler Field". The Astrophysical Journal. 831 (1): 27. arXiv: 1608.07828v1 . Bibcode:2016ApJ...831...27H. doi: 10.3847/0004-637X/831/1/27 . S2CID   42256068.
  4. 1 2 3 McQuillan, A.; Mazeh, T.; Aigrain, S. (2014). "Rotation Periods of 34,030 Keplermain-Sequence Stars: The Full Autocorrelation Sample". The Astrophysical Journal Supplement Series. 211 (2): 24. arXiv: 1402.5694v2 . Bibcode:2014ApJS..211...24M. doi:10.1088/0067-0049/211/2/24. S2CID   119113480.
  5. ↑ Reddy, Francis (27 October 2016). "NASA Missions Harvest a Passel of 'Pumpkin' Stars". NASA . Retrieved 30 October 2016.
  6. ↑ Viz, NASA (8 October 2018). "NASA Viz: Pumpkin Stars". svs.gsfc.nasa.gov. Retrieved 17 January 2021.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.