A5022606336- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Stellar, planetary, and galactic studies
Weizmann Institute of Science
2016-2017
ABSTRACT Supernovae (SNe) embedded in dense circumstellar material (CSM) may show prominent emission lines their early-time spectra (≤10 days after the explosion), owing to recombination of CSM ionized by shock-breakout flash. From such (“flash spectroscopy”), we can measure various physical properties CSM, as well mass-loss rate progenitor during year prior its explosion. Searching through Palomar Transient Factory (PTF and iPTF) SN spectroscopy databases from 2009 2014, found 12 SNe II...
During the first few days after explosion, Type II supernovae (SNe) are dominated by relatively simple physics. Theoretical predictions regarding early-time SN light curves in ultraviolet (UV) and optical bands thus quite robust. We present, for time, a sample of $57$ $R$-band that well monitored during their rise, having $>5$ detections 10 discovery, well-constrained time explosion to within $1-3$ days. show energy per unit mass ($E/M$) can be deduced roughly factor five comparing data...