Massive stars exploding in a He-rich circumstellar medium - I. Type Ibn (SN 2006jc-like) events
Massive stars exploding in a He-rich circumstellar medium - I. Type Ibn (SN 2006jc-like) events
We present new spectroscopic and photometric data of the type Ibn supernovae 2006jc, 2000er and 2002ao. We discuss the general properties of this recently proposed supernova family, which also includes SN 1999cq. The early-time monitoring of SN 2000er traces the evolution of this class of objects during the first few …