V518 Carinae

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V518 Carinae
The Southern Pleiades (IC 2602).jpg
Red circle.svg
Location of V518 Carinae in IC 2602 (circled)
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Carina
Right ascension 10h 42m 14.12040s [1]
Declination −64° 27′ 59.1323″ [1]
Apparent magnitude  (V)4.82 [2]
Characteristics
Spectral type B3/5V [3]
U−B color index −0.58 [2]
B−V color index −0.14 [2]
Variable type γ Cas? [4]
Astrometry
Parallax (π)7.19 ± 0.20  mas [1]
Distance 450 ± 10  ly
(139 ± 4  pc)
Absolute magnitude  (MV)−1.169 [5]
Details
Mass 6.2 [6]   M☉
Radius 3.30±0.07 [7]   R☉
Luminosity 753 [5]   L☉
Surface gravity (log g)4.015 [8]   cgs
Temperature 15,397 [5]   K
Rotational velocity (v sin i)120 [8]  km/s
Age 17.2 [9]   Myr
Other designations
V518 Carinae, HD  92938, HIP  52370, HR  4196
Database references
SIMBAD data

V518 Carinae (HR 4196) is a naked eye variable star in the constellation Carina. It is a member of the bright open cluster IC 2602 near the Carina Nebula.

Contents

Location

V518 Carinae lies in the open cluster IC 2602, 5 arc minutes from its brightest member θ Carinae.

Variability

A light curve for V518 Carinae, plotted from Hipparcos data V518CarLightCurve.png
A light curve for V518 Carinae, plotted from Hipparcos data

V518 Carinae was discovered to change in brightness after analysis of Hipparcos photometry. [11] The amplitude of the variations seen is 0.2 magnitudes, with possible periods of 100 and 971 days. [12] It is classified as a γ Cassiopeiae variable. [13] [4]

Spectral peculiarities

V518 Carinae is classified as a B-type main sequence star between B3 and B5. [14] It is also catalogued as a helium star, a chemically peculiar star with abnormally strong helium absorption lines in its spectrum and relatively weak hydrogen lines. It is possibly a blue straggler. [15]

V518 Carinae is also a Be star, a hot star with emission lines in its spectrum due to a disk of material around the star. Be stars that show irregular brightness changes due to the disk are grouped as γ Cassiopeiae variables. V518 Carinae is known to produce disk outbursts lasting several hundred days. [16]

Related Research Articles

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<span class="mw-page-title-main">Sigma Sculptoris</span> Variable star in the constellation Sculptor

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Mu1 Cancri, Latinised from μ1 Cancri, is a variable star in the zodiac constellation of Cancer. The name Mu1 comes from the Bayer naming system: the "1" in the name is because (from Earth) it appears to be close to 10 Cancri, or Mu2 Cancri. It is also known by the variable star designation BL Cancri. The star is dimly visible to the naked eye with an apparent visual magnitude that ranges from 5.87 down to 6.07. Parallax measurements put it about 630 light-years (192 parsecs) from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.28. The position of the star near the ecliptic means it is subject to lunar occultations.

<span class="mw-page-title-main">HD 84810</span> Star in the constellation Carina

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<span class="mw-page-title-main">V382 Carinae</span> Star in the constellation Carina

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<span class="mw-page-title-main">V520 Carinae</span> Star in the constellation Carina

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<span class="mw-page-title-main">V533 Carinae</span> Star in the constellation Carina

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<span class="mw-page-title-main">HD 96919</span> Variable star in the constellation Carina

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<span class="mw-page-title-main">Kappa Cassiopeiae</span> Star in the constellation Cassiopeia

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<span class="mw-page-title-main">Y Carinae</span> Star in the constellation Carina

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<span class="mw-page-title-main">HD 93194</span> Star in the constellation Carina

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<span class="mw-page-title-main">HD 93607</span> Star in the constellation Carina

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HD 102350 is a single star in the constellation Centaurus. It has a yellow hue and is visible to the naked eye with an apparent visual magnitude of 4.11. The distance to this star is approximately 390 light years based on parallax, but it is drifting closer with a radial velocity of −3 km/s. It has an absolute magnitude of −1.51.

<span class="mw-page-title-main">64 Eridani</span> Single, yellow-white hued star in the constellation Eridanus

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<span class="mw-page-title-main">Iota Leporis</span> Star in the constellation Lepus

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<span class="mw-page-title-main">Nu Pegasi</span> Star in the constellation Pegasus

ν Pegasi, Latinized as Nu Pegasi is a single star in the northern constellation of Pegasus. It is an orange-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.84. The star is located approximately 261 light years away based on parallax, but is drifting closer with a radial velocity of −19 km/s.

<span class="mw-page-title-main">Y Centauri</span> Variable star in the constellation Centaurus

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<span class="mw-page-title-main">42 Persei</span> Binary star system in the constellation Perseus

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References

  1. 1 2 3 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. 1 2 3 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. ↑ Houk, N; Cowley, A. P (1975). "University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0". University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
  4. 1 2 Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID   125853869.
  5. 1 2 3 Silaj, J; Landstreet, J. D (2014). "Accurate age determinations of several nearby open clusters containing magnetic Ap stars". Astronomy & Astrophysics. 566: A132. arXiv: 1407.4531 . Bibcode:2014A&A...566A.132S. doi:10.1051/0004-6361/201321468. S2CID   53370832.
  6. ↑ Tetzlaff, N; Neuhäuser, R; Hohle, M. M (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv: 1007.4883 . Bibcode:2011MNRAS.410..190T. doi: 10.1111/j.1365-2966.2010.17434.x . S2CID   118629873.
  7. ↑ Arcos, C.; et al. (March 2018). "Stellar parameters and H α line profile variability of Be stars in the BeSOS survey". Monthly Notices of the Royal Astronomical Society. 474 (4): 5287–5299. arXiv: 1711.08675 . Bibcode:2018MNRAS.474.5287A. doi: 10.1093/mnras/stx3075 . S2CID   74872624.
  8. 1 2 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.
  9. ↑ Gullikson, Kevin; Dodson-Robinson, Sarah (2013). "Detection of Low-Mass-ratio Stellar Binary Systems". The Astronomical Journal. 145 (1): 3. arXiv: 1210.6360 . Bibcode:2013AJ....145....3G. doi:10.1088/0004-6256/145/1/3. S2CID   118517725.
  10. ↑ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  11. ↑ Kazarovets, E. V.; Samus, N. N.; Durlevich, O. V.; Frolov, M. S.; Antipin, S. V.; Kireeva, N. N.; Pastukhova, E. N. (January 1999). "The 74th Special Name-list of Variable Stars" (PDF). Information Bulletin on Variable Stars. 4659. Bibcode:1999IBVS.4659....1K . Retrieved 11 January 2025.
  12. ↑ Lefèvre, L; Marchenko, S. V; Moffat, A. F. J; Acker, A (2009). "A systematic study of variability among OB-stars based on HIPPARCOS photometry". Astronomy and Astrophysics. 507 (2): 1141. Bibcode:2009A&A...507.1141L. doi: 10.1051/0004-6361/200912304 .
  13. ↑ Adelman, S. J; Mayer, M. R; Rosidivito, M. A (2000). "On the Variability of O4-B5 Luminosity Class III-V Stars". Information Bulletin on Variable Stars. 5008: 1. Bibcode:2000IBVS.5008....1A.
  14. ↑ Skiff, B. A (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016)". VizieR On-line Data Catalog: B/Mk. Originally Published in: Lowell Observatory (October 2014). 1. Bibcode:2014yCat....1.2023S.
  15. ↑ Renson, P; Manfroid, J (2009). "Catalogue of Ap, Hg Mn and Am stars". Astronomy and Astrophysics. 498 (3): 961. Bibcode:2009A&A...498..961R. doi: 10.1051/0004-6361/200810788 .
  16. ↑ Mennickent, R. E; Sabogal, B; Granada, A; Cidale, L (2009). "L-Band Spectra of 13 Outbursting Be Stars". Publications of the Astronomical Society of the Pacific. 121 (876): 125. arXiv: 0902.4279 . Bibcode:2009PASP..121..125M. doi:10.1086/597551. S2CID   119286005.
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