Abstract
We investigate the matching, across cylindrical surfaces, of static cylindrically symmetric conformally flat spacetimes with a cosmological constant \(\Lambda \), satisfying regularity conditions at the axis, to an exterior Linet–Tian spacetime. We prove that for \(\Lambda \le 0\) such matching is impossible. On the other hand, we show through simple examples that the matching is possible for \(\Lambda >0\). We suggest a physical argument that might explain these results.
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Acknowledgments
We thank the referees for useful criticisms. IB and FM thank CMAT, Univ. Minho, for support through the FEDER Funds—“Programa Operacional Factores de Competitividade COMPETE” and FCT Project Est-C/MAT/UI0013/2011. FM is supported by FCT projects PTDC/MAT/108921/2008 and CERN/FP/116377/2010. MFAdaSilva acknowledges the financial support from FAPERJ (no. E-26/171.754/2000, E-26/171.533.2002, E-26/170.951/2006, E-26/110.432/2009 and E-26/111.714/2010), Conselho Nacional de Desenvolvimento Científico e Tecnológico—CNPq—Brazil (no. 450572/2009-9, 301973/2009-1 and 477268/2010-2) and Financiadora de Estudos e Projetos—FINEP—Brazil.
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Brito, I., da Silva, M.F.A., Mena, F.C. et al. Conformally flat sources for the Linet–Tian spacetime. Gen Relativ Gravit 45, 519–530 (2013). https://doi.org/10.1007/s10714-012-1485-6
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DOI: https://doi.org/10.1007/s10714-012-1485-6