Mechanisms for eclipsing in exotic eclipsing systems

V. V. Sobolev Astronomical Institute Russia Russia
Astrophysics (Impact Factor: 0.37). 09/2006; 49(4):473-487. DOI: 10.1007/s10511-006-0046-7

ABSTRACT The stars ε Aur, KH 15D, and H 187 are utterly different in their fundamental characteristics. However, they share two important
features: (1) prolonged eclipses are observed in all three and (2) there are no spectroscopic signs of a second component.
The light curves of these objects are substantially similar, which may indicate a uniform mechanism for the eclipses. This
article analyzes models for eclipsing in these objects proposed by different authors and discusses the problems associated
with their application.

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    ABSTRACT: Recent interferometric observations of the young stellar object(YSO) HH 30 have revealed a low velocity outflow in the $^{12}$CO J=1-2 molecule line (Pety et al. 2006). We present here two models of the low velocity disc winds with the aim of investigating an origin of this molecular outflow. Following Andlada et al. (2006) we treated HH 30 as a binary system. Two cases have been considered: i) the orbital period $P$ = 53 yrs and ii) $P \le$ 1 yr. Calculations showed that in the first case the outflow cone had a spiral-like structure due to summing the velocities of the orbital motion and the disc wind. Such a structure contradicts the observations. In the second case, the outflow cone demonstrates a symmetry relatively to the system axis and agrees well with the observations. Comment: 5 pages, 4 figures. accepted by Mon. Not. R. Astron. Soc
    Monthly Notices of the Royal Astronomical Society 04/2008; · 5.52 Impact Factor