2007A&A...469..633K


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET01:58:22

2007A&A...469..633K - Astronomy and Astrophysics, volume 469, 633-637 (2007/7-2)

Interferometric observations of the multiple stellar system δ Velorum.

KELLERER A., PETR-GOTZENS M.G., KERVELLA P. and COUDE DU FORESTO V.

Abstract (from CDS):

The nearby (∼24pc) triple stellar system δ Velorum contains a close, eclipsing binary (Aa, Ab) discovered in 2000. Multiple systems provide an opportunity to determine the set of fundamental parameters (mass, luminosity, size, chemical composition) of coeval stars. These parameters can be obtained with particular precision in the case of eclipsing binaries; so we exploited this potential for δ Velorum's components (Aa, Ab). We have analysed interferometric observations of the close binary (Aa, Ab), obtained with the VINCI instrument and two VLTI siderostats. The measurements, which resolve the two components for the first time, are fitted onto the simple model of two uniformly bright, spherical stars. The observations suggest that Aa and Ab have larger diameters than expected for stars on the main sequence, hence they must be in a later evolutionary state.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: fundamental parameters - techniques: interferometric - binaries: visual - binaries: spectroscopic

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * Q Pup PM* 07 48 20.1604257 -47 04 39.798540 6.69 5.77 4.71 3.95 3.38 K0IIIb 44 0
2 * del02 Vel PM* 08 44 42.202745 -54 42 30.60235           F8V 13 0
3 * del Vel Al* 08 44 42.22658 -54 42 31.7493   2.00 1.95     A2IV+A4V+F8V 188 0
4 UCAC2 7947352 * 08 44 48.9840083044 -54 41 50.030281973     11.00 10.46   G8 8 0
5 2MASS J08444962-5441498 * 08 44 49.6322225919 -54 41 49.869669694     13.50     K0 8 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-01:58:22

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