V1339 Aquilae

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Wikipedia

V1339 Aquilae

A light curve for V1339 Aquilae, plotted from Hipparcos data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 50m 17.47881s[2]
Declination +07° 54′ 08.6936″[2]
Apparent magnitude (V) 6.22 to 6.53[3]
Characteristics
Evolutionary stage main sequence[4]
Spectral type B2.5IVe[5]
U−B color index −0.7
B−V color index −0.1
Variable type Be star[3]
Astrometry
Radial velocity (Rv)−30.10±5[6] km/s
Proper motion (μ) RA: −1.753±0.033[2] mas/yr
Dec.: −3.171±0.025[2] mas/yr
Parallax (π)1.5275±0.0369 mas[2]
Distance2,140 ± 50 ly
(650 ± 20 pc)
Details
Mass9.5[4] M☉
Radius4.64[4] R☉
Luminosity6,281[4] L☉
Surface gravity (log g)4.08[4] cgs
Temperature23,848[4] K
Rotational velocity (v sin i)140[4] km/s
Age23[7] Myr
Other designations
BD+07°4252, HD 187567, HIP 97607, HR 7554, SAO 125116
Database references
SIMBADdata
V1339 Aquilae at the centre of the sparse open cluster NGC 6828

V1339 Aquilae, also known as HD 187567, is a Be star in the constellation Aquila. At its brightest its apparent magnitude is 6.22,[3] making it barely visible to the naked eye at a location with very little light pollution. It is located just 8 arc seconds from the center of the open cluster NGC 6828.[8]

V1339 Aquilae was discovered to be a Be star in 1925 by P. W. Merrill, M. L. Humason and C. G. Burwell.[9] The star's variability was detected in 1966 by A. W. J. Cousins, R. Lake and R. H. Stoy,[10] and because of this it was given its variable star designation, V1339 Aquilae, in 1979.[11]

V1339 Aquilae is around 9.5 times as massive as the Sun and has 4.6 times its diameter.[4] Its binary nature was discovered by speckle interferometry in 1983, at the Kitt Peak 4 meter telescope. At the time of these speckle observations the stars were separated by 0.057 arc seconds.[12]

References

  1. ↑ EAS (1997). "The HIPPARCOS and TYCHO catalogues". Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astrometry Mission. ESA SP Series. 1200. Noordwijk, Netherlands: ESA Publications Division. Bibcode:1997ESASP1200.....E. ISBN 9290923997. Retrieved 15 October 2022.
  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 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. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.
  4. 1 2 3 4 5 6 7 8 Cochetti, Y. R.; Zorec, J.; Cidale, L. S.; Arias, M. L.; Aidelman, Y.; Torres, A. F.; Frémat, Y.; Granada, A. (2020). "Be and Bn stars: Balmer discontinuity and stellar-class relationship". Astronomy and Astrophysics. 634: A18. arXiv:1912.12994. Bibcode:2020A&A...634A..18C. doi:10.1051/0004-6361/201936444.
  5. ↑ Jaschek, C.; Jaschek, M. (1992). "A southern be star survey : Spectra and envelope radii". Astronomy and Astrophysics Supplement Series. 95: 535. Bibcode:1992A&AS...95..535J.
  6. ↑ Turon, C.; et al. (1993). "Version 2 of the HIPPARCOS Input Catalogue". Bulletin d'Information du Centre de Donnees Stellaires. 43: 5. Bibcode:1993BICDS..43....5T.
  7. ↑ 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. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.
  8. ↑ Zejda, M.; Paunzen, E.; Baumann, B.; Mikulášek, Z.; Liška, J. (December 2012). "Catalogue of variable stars in open cluster fields". Astronomy & Astrophysics. 548: A97–A102. arXiv:1211.1153. Bibcode:2012A&A...548A..97Z. doi:10.1051/0004-6361/201219186.
  9. ↑ Merrill, Paul W.; Humason, Milton L.; Burrell, Cora G. (June 1925). "Discovery and Observations of Stars of Class Be". Astrophysical Journal. 61: 389–417. Bibcode:1925ApJ....61..389M. doi:10.1086/142899.
  10. ↑ Cousins, A. W. J.; Lake, R.; Stoy, R. H. (1966). "Photoelectric magnitudes and colours of southern stars, II". Royal Observatory Bulletins. 121 (121): 1. Bibcode:1966RGOB..121....1C.
  11. ↑ Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (April 1979). "64th Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1581 (1581): 1–8. Bibcode:1979IBVS.1581....1K. Retrieved 27 August 2024.
  12. ↑ McAlister, Harold A.; Hartkopf, William I. H.; Hutter, Donald J.; Franz, Otto G. (March 1987). "ICCD Speckle Observations of Binary Stars. II. Measurements During 1982 -1985 from the Kitt Peak 4 m Telescope". Astronomical Journal. 93: 688–777. Bibcode:1987AJ.....93..688M. doi:10.1086/114353.