Articles tagged with Ultraviolet Astronomy
A team of researchers at Kyoto University used NICER and Hisaki to study a superflare on the star UX Arietis, finding that photoionization is the dominant mechanism behind the iron Kα line. This discovery provides a diagnostic tool for astronomers to infer flare locations on stellar surfaces.
A team of scientists used Solar Orbiter's instruments to capture a large solar flare in unprecedented detail. The observations revealed that the flare was triggered by initially weak disturbances that quickly became more violent, creating a 'sky' of raining plasma blobs.
The European Space Agency-led Solar Orbiter mission has split energetic particles into two groups, tracing them back to distinct solar outbursts. Researchers found that one type of particle is connected to intense solar flares and the other to larger coronal mass ejections.
Researchers have discovered a rare white dwarf remnant with a carbon signature, suggesting it formed from the merger of two stars. The high-mass white dwarf, WD 0525+526, has a thin atmosphere that allows carbon to reach its surface, providing insights into the early stages of stellar evolution.
A Rutgers-led team has detected a potentially star-forming cloud, Eos, located 300 light years away from Earth, using far-ultraviolet fluorescence emission technique. The discovery opens new possibilities for studying the molecular universe and understanding interstellar medium formation.
Researchers, including WVU astronomer Emmanuel Fonseca, use radio pulsars to detect gravitational waves generated by massive objects. The study will merge data from the Green Bank Telescope and CHIME radio telescope to achieve full coverage of each wave, revealing information about phenomenon and objects in distant galaxies.
Astronomers have used Hubble and SOFIA to study the HM Sge binary star system, which experienced a sudden increase in brightness 40 years ago. The team has found that the system's temperature has increased, but paradoxically faded slightly, raising questions about its long-term behavior.
Researchers have identified a population of massive stars stripped of their hydrogen envelopes by their companions in binary systems. These hot helium stars are believed to be the origins of hydrogen-poor core-collapse supernovae and neutron star mergers, shedding new light on a long-theorized phenomenon.
Scientists have developed a new method to measure moderately saturated sources of the Ultra-Violet Optical Telescope onboard the Swift satellite. GRB 220101A is the most energetic ultraviolet/optical flare ever detected, with a luminosity approximately 400 quadrillion times that of the Sun.
Astronomers have discovered a galaxy with a unique activity in its core, leading to a reclassification as a giant radio galaxy. The PBC J2333.9-2343 galaxy has a blazar at its center with jets that changed direction drastically by up to 90 degrees.
Researchers have observed long, web-like plasma structures in the Sun's middle corona, which discharge particles into space through interactions within the structures. This innovative observation method could lead to a better understanding of the solar wind's origins and its interactions with the rest of the solar system.
A new study suggests that the Hypatia Stone, discovered in Egypt, may be the first tangible evidence on Earth of a supernova type Ia explosion. The stone's unique chemistry and elemental composition contradict conventional views of solar system formation, potentially revealing a long-hidden secret about our cosmic neighborhood.
Researchers have discovered a uniquely shaped hot spot on a baby star 450 million light-years away, providing new clues about the formation of our solar system. The discovery confirms accretion models and sheds light on how young stars grow.
The ASAS-SN telescope network discovered a tidal disruption event in 2019, which was followed up with observations from NASA's Swift satellite and TESS. The team captured the event's evolution, revealing unique characteristics such as a smooth increase in brightness and a young host galaxy.
After two months of tweaking, FUSE's control system resumed operations at an efficiency comparable to earlier in the mission. The satellite has obtained significant science data on various celestial objects, including discovering a hot gas halo around the Milky Way galaxy.
Astronomers have directly detected a new type of stellar flare on the binary system HR 1099, challenging current models and providing insight into flare physics. The flares were observed in a narrow temperature range of gas on the star, distinct from the hot gas that emits X-rays.
FUSE is the first large-scale space mission fully planned and operated by a university department. It will study the origin and evolution of hydrogen and deuterium, as well as galaxy evolution and star formation, analyzing clouds of gases between stars in the Milky Way and nearby galaxies.
The Johns Hopkins University team used the Midcourse Space Experiment satellite to create a wide-angle ultraviolet image of dust surrounding a star-forming region, M42. The image offers insights into star birth and galaxy properties, with potential to learn about the cycle of star formation, death, and rebirth.
The discovery of EUV emissions in the Coma cluster suggests a large cloud of cooler matter, totaling up to 10 trillion of our Suns, which could help clear up a major problem with these galactic groupings. The findings also hint at the presence of normal baryonic matter instead of dark matter or exotic particles.