2007A&A...461.1065C


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET19:45:36

2007A&A...461.1065C - Astronomy and Astrophysics, volume 461, 1065-1075 (2007/1-3)

Four-colour photometry of eclipsing binaries. XL. uvby light curves for the B-type systems DW Carinae, BF Centauri, AC Velorum, and NSV 5783.

CLAUSEN J.V., HELT B.E., GIMENEZ A., VAZ L.P.R., GARCIA J.M., OLSEN E.H. and SOUTHWORTH J.

Abstract (from CDS):

In order to increase the limited number of B-stars with accurately known dimensions, and also the number of well studied eclipsing binaries in open clusters, we have undertaken observations and studies of four southern double-lined eclipsing B-type binaries; DW Car, BF Cen, AC Vel, and NSV 5783. Complete uvby light curves were observed between January 1982 and April 1991 at the Danish 0.5m telescope at ESO La Silla, since 1985 known as the Stroemgren Automatic Telescope (SAT). Standard indices for the systems and the comparison stars, as well as additional minima observations for AC Vel, have been obtained later at SAT. For DW Car and AC Vel, high-resolution spectra for definitive spectroscopic orbits have also been obtained; they are presented as part of the detailed analyses of these systems. A few spectra of NSV 5783 are included in the present paper. For all four systems, the first modern accurate light curves have been established. DW Car is a detached system consisting of two nearly identical components. It is member of the young open cluster Cr228. A detailed analysis, based on the new light curves and 29 high-resolution spectra, is published separately. BF Cen is semidetached and is member of NGC 3766. Modern spectra are needed for a detailed study. AC Vel is a detached system with at least one more star. A full analysis, based on the new light curves and 18 high-resolution spectra, is published separately. NSV 5783 is discovered to be an eclipsing binary consisting of two well-detached components in an 11-day period eccentric (e=0.18) orbit. Secondary eclipse is practically total. From the light curves and a few high-resolution spectra, accurate photometric elements and preliminary absolute dimensions have been determined. The quite similar components have masses of about 5M and radii of about 3.5R, and they seem to have evolved just slightly off the ZAMS. The measured rotational velocities (≃150km/s) are about 6 times those corresponding to pseudosynchronization.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: binaries: eclipsing - stars: evolution - galaxy: open clusters and associations: general - techniques: photometric - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/461/1065): table11.dat table12.dat table13.dat table14.dat>

Simbad objects: 24

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Number of rows : 24

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 HD 92072 * 10 36 32.7815245890 -59 11 25.199110896   6.92 7.04     B6(IV) 24 0
2 HD 92155 * 10 37 16.1121565860 -53 51 18.930633039   6.264 6.417     B3V 19 0
3 HD 92288 V* 10 38 04.1371033411 -59 04 28.183416985   7.83 7.90     B6V 19 0
4 HD 92757 * 10 41 26.1007625741 -56 04 07.400635909   6.79 6.80     B9.5V 10 0
5 V* DW Car Al* 10 43 10.0816952047 -60 02 11.743736924 9.02 9.83 9.85 10.03 9.59 B1III 66 0
6 Cl Collinder 228 OpC 10 44 00 -60 05.2   4.58 4.4     ~ 191 0
7 HD 93191 SB* 10 44 27.5556420152 -59 53 05.535293640 8.31 8.48 8.50     A0 19 0
8 NAME Homunculus Nebula ISM 10 45 03.5 -59 41 04           ~ 327 1
9 V* AC Vel bL* 10 46 18.3781838907 -56 49 45.818051053   9.04 9.00     B3III/V 21 0
10 HD 93943 ** 10 49 24.4360163774 -59 19 25.616001590 5.85 5.91 5.91     B9.5IV/V 32 0
11 V* GV Car Al* 11 05 32.8876950338 -58 43 49.840053198   8.919 8.910 8.802 8.811 A0 40 0
12 V* EM Car Al* 11 12 04.5059542892 -61 05 42.941349454 8.06 8.80 8.54 9.25   O7.5V((f))+O7.5V((f)) 152 0
13 V* TU Mus bL* 11 31 10.9242217305 -65 44 32.098796901 7.58 9.52 9.34 9.25   O8V(n)z+B0V(n) 153 0
14 V* BF Cen Al* 11 36 17.0350065550 -61 28 01.401506065   8.508 8.484   8.619 B8 38 0
15 NGC 3766 OpC 11 36 18 -61 36.9   5.66 5.3     ~ 186 0
16 HD 100942 * 11 36 34.05008 -60 53 40.5641   8.12 8.12     B8/9V 17 1
17 HD 101466 * 11 40 06.8786986251 -61 11 08.678647698   7.35 7.30     A0IV 18 0
18 V* V346 Cen Al* 11 42 49.6741357418 -62 26 05.401518409 7.64 9.58 9.57 9.28 8.471 B1/3II/III 85 0
19 V* LZ Cen bL* 11 50 32.4600932263 -60 47 38.050839590   8.28 8.25 9.02   B2III 42 0
20 HD 108925 * 12 31 16.7192755816 -57 04 52.786384504   6.58 6.45     A3V 38 0
21 V* EP Cru Al* 12 37 16.7488204092 -56 47 17.403902686   8.65 8.69     B5V 31 0
22 HD 109808 ** 12 38 07.25326 -55 55 52.3849           A1/2V 21 0
23 V* SZ Cen Al* 13 50 35.0927038963 -58 29 57.099764696   8.89 8.59     A6III 97 0
24 V* V636 Cen Al* 14 16 57.9116991617 -49 56 42.366293617   9.70 9.09     G0V 84 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-19:45:36

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