14 Lacertae

Binary star in the constellation Lacerta 250px A visual band light curve for V360 Lacertae, adapted from Linnell et al. (2006) J2000 Lacerta 22 50 21.77721 +41 57 12.1795 5.91 B3IV:eaV (B4 + F9 III) +0.083 −0.508 β Lyr −15.8 3.1 +6.047 +1.124 2.0147 0.1990 10.085415 0.000080 days 0.0 2441170.285 0.029 25.8 1.7 159.2 0.2 14 Lac A 7.45 0.3 (polar) 7.55 (Polar) 18000 1000 commas 3.55 14 Lac B 1.21 0.05 (polar) 8.85 (polar) 6000 200 commas 2.65 V360 Lac 14 Lac +41°4623 216200 112778 8690 52412 J22504+4157 14+Lac 14 Lacertae is a binary star system in the northern constellation Lacerta, located around 1,600 light years away. It has the variable star designation V360 Lacertae; 14 Lacertae is the Flamsteed designation. The system is barely visible to the naked eye in good seeing conditions, having a peak apparent visual magnitude of 5.91. It is moving closer to the Earth with a heliocentric radial velocity of −16 km/s. This is a double-lined spectroscopic binary in a close, circular orbit with a period of 10.08 days and a separation of 40.327 solar radius Gm on on. The orbital inclination is 65 1 °. 14 Lac is a variable star system that, once per orbit, shows a primary minimum with a 0.07 magnitude decrease and a secondary minimum with a decrease of 0.02. The primary component is a Be star that is spinning rapidly at its critical velocity. The lower mass secondary is synchronously rotating and is filling its Roche lobe. The rapid rotation of the primary may have been caused by mass transfer from the secondary. Samus et al. (2017) classify this as a detached Beta Lyrae-type eclipsing binary, although they note there is some uncertainty in the classification. Bossi et al. (1998) argued that the system is neither an eclipsing binary nor an ellipsoidal variable. Instead they propose the variability is caused by distortion of a gaseous shell by the secondary component. Linnell et al. (2006) demonstrated that the light curve is mostly caused by tidal distortion in combination with illumination of the lower mass secondary by the primary. References 14 Lac 2019-01-31 1932855787101481216 Properties and nature of Be stars. 24. Better data and model for the Be+F binary V360 Lacertae 1 Linnell A. P. Albert Paul Linnell Harmanec P. Koubský P. Božić H. Yang S. Ruždjak D. Sudar D. Libich J. Eenens P. Krpata J. Wolf M. Škoda P. Šlechta M. Astronomy and Astrophysics . 455 3 September 2006 1037–1052 10.1051/0004-6361:20053792 2006A&A...455.1037L free Malkov O. Yu. Oblak E. Snegireva E. A. Torra J. 1 Astronomy and Astrophysics A catalogue of eclipsing variables 446 2 785–789 February 2006 10.1051/0004-6361:20053137 2006A&A...446..785M http://elar.urfu.ru/bitstream/10995/73280/1/10.1051-0004-6361-20053137.pdf free Properties and nature of Be stars. 17. V360 Lac = HD 216200 is a B3e + F9IV: binary 1 Hill G. Harmanec P. Pavlovski K. Bozic H. Hadrava P. Koubsky P. Ziznovsky J. Astronomy and Astrophysics 324 965–976 August 1997 1997A&A...324..965H . 14 Lacertae: A case of shell-orbit coupling? 1 Bossi M. Nunez N. S. Guerrero G. Sareyan J. -P. Alvarez M. Astronomy and Astrophysics Supplement 127 433–444 February 1998 3 10.1051/aas:1998112 1998A&AS..127..433B free Properties and nature of Be stars. 30. Reliable physical properties of a semi-detached B9.5e+G8III binary BR CMi = HD 61273 compared to those of other well studied semi-detached emission-line binaries Harmanec P. Koubský P. Nemravová J. A. Royer F. Briot D. North P. Lampens P. Frémat Y. Yang S. Božić H. Kotková L. Škoda P. Šlechta M. Korčáková D. Wolf M. Zasche P. Astronomy & Astrophysics 1 . 573 A107 17 January 2015 10.1051/0004-6361/201424640 1411.5651 2015A&A...573A.107H free General Catalogue of Variable Stars 1 Samus N. N. Kazarovets E. V. Durlevich O. V. Kireeva N. N. Pastukhova E. N. 5.1 Astronomy Reports 2017 61 1 80–88 10.1134/S1063772917010085 2017ARep...61...80S 125853869 . Gontcharov G. A. Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system Astronomy Letters 32 11 759–771 November 2006 10.1134/S1063773706110065 2006AstL...32..759G 1606.08053 119231169 . Category:B-type subgiants Category:F-type giants Category:Beta Lyrae variables Category:Lacerta Category:Durchmusterung objects Lacertae, 14 216200 112778 8690 Lacertae, V360 Category:B4 stars Category:F9 stars