Eclipsing binaries are excellent laboratories for studying a wide variety of processes in stellar astrophysics. Their usefulness extends far beyond their textbook role in the determination of stellar masses and radii. The study of apsidal motion in detached eclipsing binary systems with eccentric orbit is known as an important source of information for the stellar internal structure as well as the possibility of verification of general relativity. Suitable objects for this research were recently collected by Giménez (1994).
In this paper, we report new results for our observational project initiated in 1993 with the main purpose of monitoring eclipsing binaries with eccentric orbits, see also Wolf et al. (1999) or Wolf (2000). In this paper, we compare observational data of apsidal motion rates for two eclipsing systems with significant relativistic contribution. The two relatively bright equatorial objects, TV Cet and V451 Oph, are analysed here. V451 Oph is a well studied early-type eclipsing binary, whose orbit has been known to be eccentric and to exhibit apsidal motion. On the other hand, TV Ceti, due to its rather long orbital period, is a rarely investigated system of similar brightness.
|
System |
JD Hel.- | Error | Epoch | Method | Reference |
| 2400000 | [day] | Filter | Observatory | ||
| TV Cet | 46687.8088* | 0.0093 | 549.5 | pe, R | Caton & Hawkins (1987) |
| 47147.58576 | 0.00022 | 600.0 | pe, V | Caton et al. (1989) | |
| 47566.338 | 0.001 | 646.0 | pe, B | Diethelm (1989) | |
| 48135.2339 | 0.0020 | 708.5 | pe, H | Hipparcos | |
| 48622.3207 | 0.0020 | 762.0 | pe, B | Diethelm (1992) | |
| 50470.2868* | 0.0004 | 965.0 | CCD, - | Agerer & Hübscher (1998) | |
| 51421.5165 | 0.0003 | 1069.5 | pe, UBV | this paper, SAAO | |
| 51776.544 | 0.001 | 1108.5 | CCD, R | this paper, Ondrejov | |
| 51899.5004 | 0.0001 | 1122.0 | CCD, R | this paper, Lelekovice | |
| V451 Oph | 46210.530 | 0.002 | 147.5 | pe, B | Diethelm (1985) |
| 46298.392 | 0.002 | 187.5 | pe, B | Diethelm (1985) | |
| 47307.73282 | 0.00035 | 647.0 | pe, V | Caton et al. (1989) | |
| 47437.3303 | 0.000 | 706.0 | pe | Isles (1991) | |
| 47654.79386 | 0.00028 | 805.0 | pe, V | Caton et al. (1989) | |
| 47696.5275 | 0.000 | 824.0 | pe | Isles (1992) | |
| 48108.3891 | 0.0005 | 1011.5 | pe, B | Diethelm (1990) | |
| 48476.3240 | 0.000 | 1179.0 | pe, BV | Isles (1997) | |
| 48499.3838 | 0.0008 | 1189.5 | pe | Blättler (1992) | |
| 48655.342 | 0.002 | 1260.5 | pe, H | Hipparcos | |
| 49560.3397 | 0.0004 | 1672.5 | pe, UBV | Müyesseroglu et al. (1996) | |
| 51415.3614 | 0.0003 | 2517.0 | pe, BV | this paper, SAAO | |
| 51773.4089** | 0.0006 | 2680.0 | CCD, - | this paper, Metzerlen | |
| 51774.5105 | 0.0001 | 2680.5 | CCD, R | this paper, Lelekovice | |
| 51806.3563 | 0.0001 | 2695.0 | CCD, R | this paper, Lelekovice |
Copyright ESO 2001