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Type Ii Supernovae

All articles tagged with #type ii supernovae

astronomy2 years ago

"Supernova Discovery Shakes Up Stellar Evolution Theory with Extreme Weight Loss"

The discovery of a nearby supernova, SN 2023ixf, challenges the standard theory of stellar evolution as it exhibited extreme mass loss in the year leading up to its explosion, shedding a mass equivalent to that of the Sun. This unexpected behavior provides insight into the final stages of a star's life and suggests potential instability. The delayed shock breakout observed in SN 2023ixf indicates the presence of dense material from recent mass loss, contradicting previous expectations. Further observations and collaboration between amateur and professional astronomers are crucial in understanding the evolution of massive stars and their supernova explosions.

via SciTechDaily|
#astronomy#mass-loss#observations
astronomy2 years ago

Astronomers Uncover Dozen New Long-Rising Type II Supernovae

Astronomers have discovered 12 new long-rising Type II supernovae as part of the Zwicky Transient Facility Census of the Local Universe, nearly doubling the number of known supernovae of this subclass. Type II supernovae are the result of the rapid collapse and violent explosion of massive stars, and are distinguished by the presence of hydrogen in their spectra. The newfound Type II supernovae have rise times ranging from 67 to 96 days and dome-shaped light curves in r-band photometry, and all have peak absolute magnitudes consistent with previous studies of the known long-rising Type II supernovae.

via Phys.org|
#astronomy#core-collapse-supernovae#long-rising
astronomy2 years ago

Hubble Captures Cosmic Chaos at Pegasus Supernova Afterparty

The Hubble Space Telescope has captured an image of the irregular galaxy NGC 7292 in the Pegasus constellation, which is known for its stretched-out core and classification as a low surface brightness galaxy. The study focuses on the aftermath of its supernova, SN 1964H, to better understand Type II supernovae and the potential surviving stellar companions. Astronomers hope to learn more about the diversity of Type II supernovae they have observed by scrutinizing the aftermath and remaining nearby stars of a large sample of historical Type II supernovae.

via SciTechDaily|
#astronomy#hubble-space-telescope#ngc-7292