2011MNRAS.418.1764B

Query : 2011MNRAS.418.1764B

2011MNRAS.418.1764B - Mon. Not. R. Astron. Soc., 418, 1764-1773 (2011/December-2)

Observations and analysis of the system R Canis Majoris.

BUDDING E. and BUTLAND R.

Abstract (from CDS):

New high-resolution spectroscopy of the Algol-type binary R CMa is presented and reduced, allowing a re-analysis of this `puzzling' close pair. New radial velocity curves are in better agreement with the results of Glazunova, Yushchenko & Mrktichian, which revise upwards the relatively low masses of Tomkin. We find the following main parameters: M1= 1.67±0.08, M2= 0.22±0.07; R1= 1.78±0.03, R2= 1.22 ± 0.07; L1= 8.2±0.2, L2= 0.49±0.01 (solar units); and photometric parallax 22±1 mas.

Certain anomalous features of the system remain, however, in particular the combination of low period P and low mass ratio q. This may be related to the third body known to attend the close eclipsing pair, for which we also provide a new astrometric analysis and accompanying numerical results: M3= 0.8±0.1; R3= 0.83±0.07; L3= 0.4±0.1 (solar units). The `R CMa type', within the context of Algol evolution, may be seen as involving an unusually low q, P combination.


Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): methods: data analysis - binaries: close - stars: individual: R CMa - Galaxy: stellar content

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* R CMa SB* 07 19 28.1785241208 -16 23 42.895279824 6.09 6.05 5.70     F2III/IV 290 0
2 V* AL Cam EB* 11 40 24.6931195464 +80 14 09.527599896   10.54 10.31     A2 54 0
3 V* V338 Her SB* 17 53 12.7350384480 +43 46 23.167154964   10.47 10.20     F2V 76 0

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