V1339 Aquilae

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V1339 Aquilae
V1339AqlLightCurve.png
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]
Distance 2,140 ± 50  ly
(650 ± 20  pc)
Details
Mass 9.5 [4]   M☉
Radius 4.64 [4]   R☉
Luminosity 6,281 [4]   L☉
Surface gravity (log g)4.08 [4]   cgs
Temperature 23,848 [4]   K
Rotational velocity (v sin i)140 [4]  km/s
Age 23 [7]   Myr
Other designations
BD+07°4252, HD 187567, HIP 97607, HR 7554, SAO 125116
Database references
SIMBAD data
V1339 Aquilae at the centre of the sparse open cluster NGC 6828 NGC 6828 PanS.jpg
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.
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