naa a22 4500 510766846 CHVBK 20180411083159.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s12043-012-0498-8 doi (NATIONALLICENCE)springer-10.1007/s12043-012-0498-8 Spherically symmetric scalar field collapse [Elektronische Daten] [KOYEL GANGULY, NARAYAN BANERJEE] It is shown that a scalar field, minimally coupled to gravity, may have collapsing modes even when the energy condition is violated, that is, for (ρ + 3p) < 0. This result may be useful in the investigation of the possible clustering of dark energy. All the examples dealt with have apparent horizons formed before the formation of singularity. The singularities formed are shell focussing in nature. The density of the scalar field distribution is seen to diverge at singularity. The Ricci scalar also diverges at the singularity. The interior spherically symmetric metric is matched with exterior Vaidya metric at the hypersurface and the appropriate junction conditions are obtained. Indian Academy of Sciences, 2012 Gravitational collapse nationallicence scalar field nationallicence dark energy nationallicence apparent horizon nationallicence GANGULY KOYEL Relativity and Cosmology Research Centre, Department of Physics, Jadavpur University, 700 032, Kolkata, India aut BANERJEE NARAYAN IISER-Kolkata, Mohanpur Campus, P.O. BCKV Main Office, 741 252, Nadia, India aut Pramana Springer-Verlag 80/3(2013-03-01), 439-448 0304-4289 80:3<439 2013 80 12043 https://doi.org/10.1007/s12043-012-0498-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12043-012-0498-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- GANGULY KOYEL Relativity and Cosmology Research Centre, Department of Physics, Jadavpur University, 700 032, Kolkata, India aut NATIONALLICENCE 700 1- BANERJEE NARAYAN IISER-Kolkata, Mohanpur Campus, P.O. BCKV Main Office, 741 252, Nadia, India aut NATIONALLICENCE 773 0- Pramana Springer-Verlag 80/3(2013-03-01), 439-448 0304-4289 80:3<439 2013 80 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer