2016A&A...591A.129M


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET12:18:53

2016A&A...591A.129M - Astronomy and Astrophysics, volume 591A, 129-129 (2016/7-1)

V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt change of orbital period.

MAYER P., HARMANEC P., WOLF M., NEMRAVOVA J., PRSA A., FREMAT Y., ZEJDA M., LISKA J., JURYSEK J., HONKOVA K. and MASEK M.

Abstract (from CDS):

New physical elements of the early B-type eclipsing binary V346 Cen are derived using the HARPS spectra downloaded from the ESO archive and also numerous photometric observations from various sources. A model of the observed times of primary and secondary minima that fits them best is a combination of the apsidal motion and an abrupt decrease in the orbital period from 6.322123d to 6.321843d (shortening by 24s), which occurred somewhere around JD 2439000. Assumption of a secularly decreasing orbital period provides a significantly worse fit. Local times of minima and the final solution of the light curve were obtained with the program PHOEBE. Radial velocities of both binary components, free of line blending, were derived via 2D cross-correlation with a program built on the principles of the program TODCOR. The oxygen lines in the secondary spectra are weaker than those in the model spectra of solar chemical composition. Using the component spectra disentangled with the program KOREL, we find that both components rotate considerably faster than would correspond to the synchronization at periastron. The apside rotation known from earlier studies is confirmed and compared to the theoretical value.

Abstract Copyright: © ESO, 2016

Journal keyword(s): stars: early-type - binaries: close - stars: individual: V346 Cen

VizieR on-line data: <Available at CDS (J/A+A/591/A129): tablea2.dat tablea3.dat tablea4.dat tablea5.dat tablea6.dat>

Simbad objects: 17

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Number of rows : 17

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 308 PM* 00 07 37.8502664892 -51 57 17.448531447   10.08 9.37     G8(IV)+F/G 13 0
2 HD 100942 ** 11 36 34.05008 -60 53 40.5641   8.12 8.12     B8/9V 17 1
3 HD 101466 * 11 40 06.8786986251 -61 11 08.678647698   7.35 7.30     A0IV 19 0
4 HD 101511 * 11 40 26.4162170321 -62 11 53.782650274 7.94 8.18 8.16     B9V 19 0
5 CPD-61 2540 * 11 42 24.4535765145 -62 34 35.057052037   10.58 9.71     ~ 4 0
6 V* V916 Cen bC* 11 42 25.3477397515 -62 28 37.473774562 8.00 9.68 9.63 9.41   B0.5IVne 43 0
7 CD-61 3157 * 11 42 41.2290858788 -62 34 12.072743511   11.2 9.4     ~ 5 0
8 HD 101838 bC* 11 42 49.2823604726 -62 33 54.983122289 7.64 9.56 9.55 9.29   B0.5/1III 38 0
9 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 88 0
10 C 1141-622 OpC 11 43 48 -62 31.0   6.33 6.3     ~ 68 0
11 HD 102053 * 11 44 16.5930396717 -62 33 47.355866181   9.01 8.95     ApSi 18 0
12 HD 102152 * 11 45 05.6821196326 -61 31 02.286156401   9.16 9.15     A0V 13 0
13 HD 139319 ** 15 33 51.05705 +63 54 25.6950           ~ 234 0
14 HD 139319A SB* 15 33 51.0598928122 +63 54 25.706692279   7.75 7.46     A5m 241 0
15 V* V505 Sgr Al* 19 53 06.3822777147 -14 36 11.478076816   6.62 6.48     A2IV-V 201 0
16 HD 208392 Be* 21 53 48.0971722883 +62 36 51.899417888 6.74 7.20 7.03     B1Vn 153 0
17 HD 224559 Be* 23 58 46.4391020038 +46 24 47.442722137 5.84 6.444 6.538     B4Vne 130 1

    Equat.    Gal    SGal    Ecl

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