The k-essence scalar field in the context of Supernova Ia observations Abhijit Bandyopadhyay, Debashis Gangopadhyay and Arka Moulik Eur. Phys. J. C, 72 3 (2012) 1943 Published online: 28 March 2012 DOI: 10.1140/epjc/s10052-012-1943-z