All articles tagged with #nova
Astronomers using the CHARA Array and other telescopes captured real-time images of two novae (V1674 Herculis and V1405 Cassiopeiae), revealing complex, multi-stage gas outflows and gamma-ray emissions—showing that nova explosions are not single blasts and linking surface nuclear processes to the geometry of ejected material and high-energy radiation.
High-resolution CHARA Array images of 2021 novae V1674 Herculis and V1405 Cassiopeiae reveal complex, jet-driven eruptions in binary white-dwarf systems, including perpendicular outflows and a delayed ejection likely tied to a common-envelope phase. The gamma-ray signals observed by NASA’s Fermi coincide with internal shocks in the debris, linking surface nuclear reactions to high-energy radiation and challenging the idea of novae as simple spherical shells. These findings, published in Nature Astronomy, position novae as natural laboratories for extreme physics.
Scientists using the CHARA Array’s near-infrared interferometry captured high‑resolution images of two novae (V1674 Herculis and V1405 Cassiopeiae), showing non‑spherical, interacting ejecta and fast/slow evolution, with a gamma-ray connection that challenges the idea of a single impulsive explosion.
Physicists from NOvA (U.S.) and T2K (Japan) merged data from two long-baseline neutrino experiments to sharpen measurements of neutrino oscillations, reducing the uncertainty on the mass-squared difference to under 2% and clarifying CP-violation effects, with implications for the matter–antimatter imbalance in the universe.
A joint analysis of neutrino oscillation data from the T2K and NOvA experiments provides improved constraints on oscillation parameters, including the mixing angle θ23, mass-squared difference Δm32², and the CP-violating phase δCP, with no significant preference for either mass ordering but evidence suggesting potential CP violation, especially under the inverted mass ordering assumption.
Rochester has a rare chance to observe the 'Blaze Star' (T Coronae Borealis), a binary star system that periodically erupts in a nova, becoming temporarily visible in the night sky. The star last appeared in 1946 and could reappear anytime from now through next year, offering a once-in-a-lifetime viewing opportunity for about a week.
A potential new nova has been observed in the constellation Centaurus, possibly visible to the naked eye from dark-sky locations, and was discovered by John Seach. The nova is a stellar explosion involving a white dwarf and a companion star, and its exact distance remains unknown.
Two rare naked-eye nova explosions, V572 Velorum and V462 Lupi, are currently visible in the southern hemisphere sky, an exceedingly rare event that may soon fade from view, caused by thermonuclear explosions on white dwarf stars in binary systems.
Two novae, V572 Velorum and V462 Lupi, have appeared simultaneously in the night sky, an extremely rare event, with both now visible to the naked eye in the Southern Hemisphere. This coincidence occurs as astronomers anticipate the explosion of T Coronae Borealis, which is expected roughly every 80 years. Such simultaneous nova events are unprecedented and highlight the rarity of these cosmic phenomena.
Two rare classical novas, V462 Lupi and V572 Velorum, have been simultaneously visible to the naked eye in the night sky, an unprecedented event in recorded history, highlighting a rare astronomical occurrence of multiple stellar explosions occurring at once.
A nova called V462 Lupi, which was initially too dim to see, has brightened dramatically after an explosion, making it visible to the naked eye in the Lupus constellation. The event was caused by a white dwarf star in a binary system undergoing a classical nova explosion. It can be observed with binoculars near the stars Delta Lupi and Kappa Centauri, especially from the southern hemisphere, before it fades from view.
A nova called V462 Lupi, which was initially too dim to see with the naked eye, has dramatically brightened after a stellar explosion, making it visible in the night sky near the Lupus constellation. The event was caused by a white dwarf in a binary system undergoing a fusion explosion, and it can be observed with binoculars or the naked eye before it fades from view. The best viewing time is around the new moon, especially for observers in the southern hemisphere.
A new nova, V462 Lupi, has appeared in the night sky and is now visible to the naked eye, brightening over 3 million times due to a stellar explosion involving a white dwarf and a companion star in the Lupus constellation, offering skywatchers a rare and dramatic celestial event.
Astronomers have detected a bright new classical nova, V462 Lupi, in the Lupus constellation, which is now visible to the naked eye from parts of North America, following a stellar explosion that occurred in the Milky Way.
Chinese astronomers in 1408 observed a nova, a dying star explosion, near the Milky Way, providing detailed historical records that confirm the event as a nova rather than a comet or meteor, and helping modern scientists narrow down its position.