Challenges for the common-envelope theory
Common Envelope Evolution
... a common envelope can start to form earlier and that mass loss through the outer Lagrange point plays a much larger ...a common envelope phase. However these system’s enter their common ...
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Post common envelope binaries from SDSS : IX, constraining the common envelope efficiency
... 10. Discussion The results obtained in the previous sections can be summarized as follows: For all systems in our sample, which is the largest sample of one specific type of PCEBs that is currently avail- able, we find ...
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The envelope of a subcategory in topology and group theory
... GROUP THEORY AHMED AYACHE AND OTHMAN ECHI Received 31 October 2004 and in revised form 5 October 2005 A collection of results are presented which are loosely centered around the notion of reflective ...
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Post common envelope binaries from SDSS XVI, Long orbital period systems and the energy budget of common envelope evolution
... 6 C O N C L U S I O N We have measured the orbital periods of SDSS J1211−0249 and SDSS J2221 + 0029 to be 7.818 ± 0.002 and 9.588 ± 0.002 d, respectively. This makes them the longest orbital period PCEBs containing a WD ...
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The challenges of nanostructures for theory
... generic challenges and temptations to the ...use theory to mimic a mesostructure? The temptation is to believe that structures that look alike actually behave ...
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The Common Good, Stakeholder Theory And The Theory Of The Firm
... the theory of the common good does not consist of starting from a predefined project of what is “good” for each person and for the company and then putting it into ...
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A Theory of Federal Common Law
... This Article is brought to you for free and open access by the Publications at NDLScholarship. It has been accepted for inclusion in Journal Articles by an authorized administrator of NDLScholarship. For more ...
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Common Working Theory into Practice
... Therefore, the only consequence of emigration is that once the individual has become non-resident in Italy for tax purposes, Italian tax will be restricted to income received in Italy[r] ...
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Post-common envelope pre-cataclysmic and cataclysmic variable binaries
... 2.1.3 HS1136+6646 FUSE data reduction Data from the 2001 and 2002 observations were reduced using the most recent available version of the FUSE data reduction software (CalFUSE v2.4). In short, the CalFUSE data reduction ...
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Eclipsing post-common envelope binaries from the Catalina surveys
... 8 CONCLUSIONS We have analysed the Catalina Sky Survey light curves of all white dwarf plus main-sequence binaries in the catalogue of Rebassa-Mansergas et al. (2012a) with g < 19, in a search for new eclipsing systems. ...
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The Planets around the Post-Common Envelope Binary NN Serpentis
... FIGURE 1. Trailed VLT/FORS image of NN Ser taken by Haefner et al. (2004) on 1999-JUN-11. ternatively, one can simply take the known plate scale and integration time and calcu- late the time scaling, checking only for a ...
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Orbital period variations in eclipsing post-common-envelope binaries
... R L = 0.49q 2/3 a i 0.6q 2/3 + ln(1 + q 1/3 ) (4) and setting R L = R AGB , where q = M AGB /M 2 and M 2 is the mass of the secondary star. This gives an initial binary separation of a i = 4.4 AU. The fit to the eclipse ...
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Accretion in the detached post common envelope binary LTT 560
... Received 4 January 2011 / Accepted 11 June 2011 ABSTRACT In a previous study, we found that the detached post-common-envelope binary LTT 560 displays an Hα emission line consisting of two anti-phased ...
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Common Material Foundation of Gravitation Theory and Quantum Theory
... the common material foundation of the gravitation theory and quantum ...Einstein’s theory, can obtain the mass-energy relation, Einstein’s equations, Friedmann’s equation and the proportions of dark ...
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Macroprudential theory: advances and challenges
... Events of the past decade have forced economists to face up to the risks posed by financial instability, so research on how policy should address financial instabilities and distortions has proliferated. This brief note ...
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Macroprudential theory : advances and challenges
... (1986) theory sug- gests that innovations in the recent past are salient for investment behavior, and plausible calibrations of learning models often imply fluctuations of much lower frequency than rational ...
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Achievements and challenges in automatic locus and envelope animations in dynamic geometry
... By obtaining several curves with their algebraic equations in a short response time the user can make a conjecture for the general case. For the caustics it may be difficult to actually prove this conjecture ...
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Five Common Project Management Challenges
... Project Insight by Metafuse, Inc., 17320 Red Hill Avenue, Suite 270, Irvine, CA 92614, 949-476-6499 #5-Spending too much time in status meetings Many project team members complain about spending too much time in ...
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Post common envelope binaries from the Sloan Digital Sky Survey
... Abstract Close binaries containing a compact object make up a wide variety of objects. The evolution of all close binaries depends crucially on the rate at which angular momentum is extracted from the binary orbit. The ...
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The orbital period of V458 Vulpeculae, a post double common envelope nova
... 11 Centro de Astrobiolog´ıa (CSIC/INTA), Ctra. de Torrej´ on a Ajalvir, km 4, E-28850 Torrej´ on de Ardoz, Madrid, Spain Accepted 2010. Received 2010 ABSTRACT We present time-resolved optical spectroscopy of V458 ...
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