Dynamical constraints on some orbital and physical properties of the WD0137-349 A/B binary system

Details Dynamical constraints on some orbital and physical properties of the WD0137-349 A/B binary system Dynamical constraints on some orbital and physical properties of the WD0137-349 A/B binary system

2006-11-22

arxiv.org/abs/gr-qc/0611120v6

Astrophys.SpaceSci.312:337-341,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

LaTex2e, 11 pages, 3 figures, no tables. It refers to gr-qc/0611126 and better clarify the result obtained there. Accepted by

Scientific paper

10.1007/s10509-007-9701-7

In this paper I deal with the WD0137-349 binary system consisting of a white dwarf (WD) and a brown dwarf (BD) in a close circular orbit of about 116 min. I, first, constrain the admissible range of values for the inclination i by noting that, from looking for deviations from the third Kepler law, the quadrupole mass moment Q would assume unlikely large values, incompatible with zero at more than 1-sigma level for i < 35 deg and i > 43 deg. Then, by conservatively assuming that the most likely values for i are those that prevent such an anomalous behavior of Q, i.e. those for which the third Kepler law is an adequate modeling of the orbital period, I obtain i=39 +/- 2 deg. Such a result is incompatible with the value i=35 deg quoted in literature by more than 2 sigma. Conversely, it is shown that the white dwarf's mass range obtained from spectroscopic measurements is compatible with my experimental range, but not for i=35 deg. As a consequence, my estimate of $i$ yields an orbital separation of a=(0.59 +/- 0.05)R_Sun and an equilibrium temperature of BD of T_eq=(2087 +/- 154)K which differ by 10% and 4%, respectively, from the corresponding values for i=35 deg.

Affiliated with

Also associated with

No associations

Rating

Dynamical constraints on some orbital and physical properties of the WD0137-349 A/B binary system does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamical constraints on some orbital and physical properties of the WD0137-349 A/B binary system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical constraints on some orbital and physical properties of the WD0137-349 A/B binary system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-700374