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A strong ultraviolet pulse from a newborn type Ia supernova
Yi Cao1, S R Kulkarni2, D Andrew Howell3
1Astronomy Department, California Institute of Technology, Pasadena, California 91125, USA.
Nature
|May 22, 2015
Summary
Observations reveal strong ultraviolet emission from a Type Ia supernova, providing evidence for the single degenerate progenitor channel. This finding helps explain the origins of these cosmic explosions and their use in measuring cosmic distances.
Area of Science:
- Astronomy and Astrophysics
- Cosmology
Background:
- Type Ia supernovae are crucial for measuring cosmological distances.
- The exact nature of their progenitors, particularly white dwarf systems, remains an active area of research.
- The single degenerate channel model proposes a white dwarf accreting matter from a companion star.
Purpose of the Study:
- To investigate the progenitor system of Type Ia supernovae.
- To gather observational evidence supporting or refuting the single degenerate channel model.
Main Methods:
- Utilizing the Swift Space Telescope for observations.
- Analyzing ultraviolet emission data from a Type Ia supernova within four days of its explosion.
Main Results:
- Detection of strong, declining ultraviolet emission shortly after the supernova event.
- The observed emission pattern aligns with theoretical predictions of ejecta-companion star interaction.
Conclusions:
- The findings provide compelling observational evidence for the single degenerate channel as a progenitor pathway for some Type Ia supernovae.
- This supports the use of Type Ia supernovae as standard candles in cosmology.
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