000005163 001__ 5163
000005163 005__ 20210123122103.0
000005163 0247_ $$2DOI$$a10.31577/caosp.2020.50.2.580
000005163 037__ $$aSCART-2021-0031
000005163 100__ $$aMayer, P. 
000005163 245__ $$aImproved physical properties of the quadruple sub-system with the eclipsing binary QZ Carinae
000005163 260__ $$c2020
000005163 520__ $$aUsing a collection of 79 spectra of the quadruple system QZ Car, we were able -- for the first time in the optical region -- to measure radial velocities of both components of the eclipsing subsystem Ac, and in combination with the photometric solution to obtain masses and radii of both bodies. We confirm that the Ac binary is a semi-detached system with a brighter primary Ac1 and a more massive secondary Ac2. Variations due to the light-time effect and secular changes in the systemic velocities of both binaries, Aa and Ac, allowed us to estimate the period of mutual orbit of binaries Aa and Ac to be about 11700 d. Preliminary improved basic properties of the system and its components are provided.
000005163 594__ $$aNO
000005163 6531_ $$aStars: binaries: eclipsing 
000005163 6531_ $$aStars: early-type 
000005163 6531_ $$aStars: fundamental parameters 
000005163 6531_ $$aStars: individual: QZ Car
000005163 700__ $$aHarmanec, P. 
000005163 700__ $$aZasche, P. 
000005163 700__ $$aCatalan-Hurtado, R. 
000005163 700__ $$aBarlow, B. N. 
000005163 700__ $$aFrémat, Y. 
000005163 700__ $$aWolf, M. 
000005163 700__ $$aDrechsel, H. 
000005163 700__ $$aChini, R. 
000005163 700__ $$aNasseri, A. 
000005163 700__ $$aChristie, G. W. 
000005163 700__ $$aWalker, W. S. G. 
000005163 700__ $$aHenden, A. A. 
000005163 700__ $$aBohlsen, T. 
000005163 700__ $$aBožić, H.
000005163 773__ $$c580-584$$n2$$pContributions of the Astronomical Observatory Skalnate Pleso$$v50$$y2020
000005163 8560_ $$fyves.fremat@observatoire.be
000005163 85642 $$ahttps://ui.adsabs.harvard.edu/link_gateway/2020CoSka..50..580M/ADS_PDF
000005163 905__ $$apublished in
000005163 980__ $$aREFERD