Tag

Type Ia Supernovae

All articles tagged with #type ia supernovae

physicscosmology1 year ago

"Physicists Propose Existence of Superluminal Matter in the Universe"

Physicists propose that the universe may be filled with particles called tachyons, capable of traveling faster than light, which could potentially make up dark matter and explain the universe's ongoing expansion. This hypothesis challenges the current cosmological model and raises fundamental questions about causality. While the evidence is limited and the existence of tachyons remains unproven, the idea offers intriguing possibilities for further research into the nature of dark matter and the fundamental phenomena governing the cosmos.

astronomy2 years ago

"Unveiling Dark Energy: Insights into the Universe's Expansion and Stability"

The Dark Energy Survey (DES) has released its final measurement at the 243rd American Astronomical Society meeting, providing one of the most precise measurements yet of the elusive parameter "w" for dark energy. This measurement, which gives a value of -0.8, challenges the predicted value of -1, potentially indicating that dark energy may not be the cosmological constant proposed by Einstein. However, the uncertainty in the measurement leaves room for the possibility of it still being the cosmological constant. The results may signal the end of "Big Rip" models, and future telescopes like ESA's Euclid mission and the Vera Rubin Observatory are expected to provide more data for further understanding of dark energy.

astronomy2 years ago

Einstein's effect causes supernova to appear multiple times.

An international team of astronomers led by Ariel Goobar of the Oskar Klein Centre at Stockholm University discovered an unusual Type Ia supernova, SN Zwicky (SN 2022qmx), and observed it four times thanks to a gravitational lens. The team observed an “Einstein Cross,” a phenomenon predicted by Einstein’s Theory of General Relativity where the presence of a gravitational lens in the foreground amplifies light from a distant object. The discovery of SN Zwicky presents numerous opportunities for astronomers, including the ability to study it in greater detail and further investigate the mysteries of gravitational lenses.

astronomy2 years ago

Astronomers Witness Rare Supernova Phenomenon Through Gravitational Lens.

An international team of researchers led by Ariel Goobar of the Oskar Klein Centre at Stockholm University discovered an unusual type Ia supernova, SN Zwicky (SN 2022qmx), and observed an "Einstein ring", an unusual phenomenon predicted by Einstein's theory of general relativity where the presence of a gravitational lens in the foreground amplifies light from a distant object. The team observed two very rare astronomical events that happened to coincide, and the discovery presents numerous opportunities for astronomers, including the ability to study SN Zwicky in greater detail and further investigate the mysteries of gravitational lenses.

astronomy2 years ago

Multiple Views of Supernova Captured Through Gravitational Lensing.

Astronomers have observed an unusual Type Ia supernova, SN Zwicky, four times thanks to a gravitational lens, an unusual phenomenon predicted by Einstein's Theory of General Relativity. The team observed it with the Zwicky Transient Facility, the adaptive optics at the W.M. Keck Observatory, and the Very Large Telescope. The Hubble Space Telescope confirmed that the multiple-image lensing effect resulted from a galaxy in the foreground that magnified the supernova 25 times. This discovery presents numerous opportunities for astronomers, including the ability to study SN Zwicky in greater detail and further investigate the mysteries of gravitational lenses.

science2 years ago

Runaway Star Discovered Racing Out of Milky Way

Researchers have identified six new runaway stars in the Milky Way, including the fastest known star to have ever escaped the galaxy, which was propelled by a massive thermonuclear blast. Four of the stars were likely pushed out as a result of Type Ia supernovae, which occur in binary star systems where one star is a white dwarf. These hypervelocity stars could help researchers calculate the birth rates of stars and discover more runaway stars.

astronomy2 years ago

Milky Way's Fastest Runaway Star Detected by Scientists

Scientists have discovered six more runaway stars in the Milky Way, including the fastest object of this type yet detected in the galaxy. Four of the newly measured objects are hypervelocity stars, traveling at speeds that exceed the escape velocity of the Milky Way, and all four are likely the result of spectacular Type Ia supernovae. The discovery has allowed for a new calculation of the rate at which these stars are born, and found that it is consistent with the estimated rate of Type Ia supernovae.