New approaches to SNe Ia progenitors

摘要: Although Type Ia supernovae (SNe Ia) are a major tool in cosmology and play key role the chemical evolution of galaxies, nature their progenitor systems (apart from fact that they must contain at least one white dwarf, explodes) remains largely unknown. In last decade, considerable efforts have been made, both observationally theoretically, to solve this problem. Observations have, however, revealed previously unsuspected variety events, ranging very underluminous outbursts clearly overluminous ones, spanning range well outside peak luminosity--decline rate light curve relationship, used make calibrated candles SNe Ia. On theoretical side, new explosion scenarios, such as violent mergings pairs dwarfs, explored. We review those recent developments, emphasizing observational findings, but also trying tie them different scenarios mechanisms proposed thus far.