Скачать или смотреть Cosmic Lensing Revelation - Triply Lensed Supernova

In the fields of modern astronomy, astrophysics, and cosmology, a significant challenge revolves around understanding cosmic expansion. There are conflicting measurements of the universe's rate of expansion, with one method showing values about 9% higher than another. Resolving this issue is crucial for our cosmological understanding.

A potential solution lies in studying type Ia supernovae, known as standard candles, due to their consistent properties. These supernovae emit intense and consistent light, making them valuable for measuring distances. However, observing them, especially at extreme distances, has been challenging.

A groundbreaking development came with the discovery of a type Ia supernova that appeared in triplicate, caused by gravitational lensing by a foreground galaxy cluster. This rare event offers a new way to measure the universe's expansion rate with high precision.

Type Ia supernovae are unique in their characteristics, allowing us to study them even in galaxies billions of light-years away. Gravitational lensing can magnify background objects, including these supernovae, allowing for precise measurements.

In this case, Dr. Brenda Frye's team used the James Webb Space Telescope to observe a massive galaxy cluster, PLCK G 165.7+67.0, with gravitational lensing effects. They discovered a type Ia supernova in a background galaxy, Arc 2, located 16 billion light-years away, appearing in three locations within the image.

The galaxy cluster G165, with a mass of 260 trillion solar masses, is already 4.5 billion light-years away. The observations also revealed 21 lensed objects in the field, confirming they are gravitationally lensed by the cluster.

The study allowed astronomers to reconstruct the lensing profile of the cluster, essential for accurate measurements of distant objects. Ongoing observations aim to provide the most precise measurement of the universe's expansion rate using the cosmic distance ladder method.

The discovery of the triply-imaged supernova, named "Supernova H0pe," offers hope for resolving the cosmic expansion puzzle, thanks to the James Webb Space Telescope's capabilities. This breakthrough may bring us closer to unlocking the universe's greatest secrets.

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