Tag: Type Ia
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SN 2024gy: Backing the Delayed-Detonation Type Ia Supernova Model
SN 2024gy: A Key Case for the Delayed-Detonation Type Ia Supernova Model In a collaborative effort spanning Chinese observatories and international partners, researchers have carried out detailed observations of SN 2024gy, a high-velocity Type Ia supernova (SN Ia). Their work strengthens the case for the delayed-detonation (DDT) scenario, a leading model that explains how exploding…
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SN 2024gy Backs Ia Supernova Delayed-Detonation Model
Overview: SN 2024gy and the Quest to Understand Type Ia Supernovae Researchers from the Yunnan Observatories of the Chinese Academy of Sciences (CAS) and international collaborators have completed a comprehensive observational study of SN 2024gy, a high-velocity Type Ia supernova (SN Ia). The findings focus on a delayed-detonation scenario, a leading theoretical framework that explains…
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NASA Watches Kepler’s Supernova Remnant Expand Across Two Decades and Beyond
Introduction: A 400-Year-Old Fireball Still Expands In 1604, astronomers watched what appeared to be a new star blaze across the night sky. Johannes Kepler documented the bright “nova” in a way that still informs modern astronomy. Today, NASA’s Chandra X-ray Observatory is used to study the Kepler supernova remnant (SNR) as it expands, cools, and…
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New Theory of Universe Expansion May Upend How We Look at the Cosmos
Rethinking Standard Candles in Cosmology For decades, astronomers have relied on Type Ia supernovae as standard candles—cosmic beacons whose brightness helps measure distances across the expanding universe. This method underpins calculations of the Hubble constant, the rate at which the cosmos stretches. Yet recent work from researchers at Yonsei University in South Korea challenges a…