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“#Calcium-rich supernova examined with X-rays for first time” Artist’s interpretation of the calcium-rich supernova 2019ehk. Shown in orange is the calcium-rich material created in the explosion. Purple coloring represents gas shedded by the star right before the explosion, which then produced bright X-ray emission when the material collided with the supernova shockwave. Credit: Aaron M….
“#Radio pulsations detected from the gamma-ray millisecond pulsar PSR J2039−5617” Integrated pulse profile of PSR J2039−5617 at 0.7 GHz. Credit: Corongiu et al., 2020. Using the Parkes telescope, an international team of astronomers has performed a monitoring campaign of a gamma-ray millisecond pulsar (MSP) known as PSR J2039−5617. The observations detected radio pulsations from this…
“#Surprisingly dense exoplanet challenges planet formation theories” New detailed observations with NSF’s NOIRLab facilities reveal a young exoplanet, orbiting a young star in the Hyades cluster, that is unusually dense for its size and age. Slightly smaller than Neptune, K2-25b orbits an M-dwarf star — the most common type of star in the galaxy —…
“#Researchers explore the origins of stars rich in phosphorus” Scheme which represents the origin of phosphorus on Earth, with respect to possible stellar sources of phosphorus in our Galaxy. Credit: Gabriel Pérez Díaz, SMM (IAC) The journal Nature Communications has published the discovery of a new type of star that is very rich in phosphorus,…
“#VLBA finds planet orbiting small, cool star” Illustration shows how the star’s motion around the center of mass between it and the planet causes a “wobble” in its motion through space. The VLBA’s ability to detect this minuscule effect revealed the presence of the planet. Credit: Bill Saxton, NRAO/AUI/NSF Using the supersharp radio “vision” of…
“#CTCV J2056-3014 is an unusual polar, study finds” CTCV J2056-3014: Periodograms and folded light curves on the 29.6 s period from the optical (top) and X-ray (bottom; from pn) data. For X-rays, the periodograms corresponding to the soft band and light curves are shown for the soft and hard bands. Credit: De Oliveira et al.,…
“#Black hole fails to do its job” Credit: X-ray: NASA/CXO/Univ. of Montreal/J. Hlavacek-Larrondo et al; Optical/IR: NASA/STScI Astronomers have discovered what can happen when a giant black hole does not intervene in the life of a galaxy cluster. Using NASA’s Chandra X-ray Observatory and other telescopes they have shown that passive black hole behavior may…
“#ALMA captures stirred-up planet factory” ALMA image of the planet-forming disk around the young star RU Lup, showing a giant set of spiral arms made out of gas. The structure extends to nearly 1000 astronomical units from the star. Credit: ALMA (ESO/NAOJ/NRAO), J. Huang; NRAO/AUI/NSF, S. Dagnello Planet-forming environments can be much more complex and…
“#Unequal neutron-star mergers create unique ‘bang’ in simulations” Through a series of simulations, an international team of researchers has determined that some mergers of neutron stars produce radiation that should be detectible from Earth. When neutron stars of unequal mass merge, the smaller star is ripped apart by tidal forces from its massive companion (left)….
“#Searching for where very unequal mass black hole binaries come from” A schematic showing two pathways (each one requiring two prior black hole binary merging events) to assemble a roughly 30 solar-mass black like the one detected in a recent black hole binary gravitational wave merger event. Astronomers trying to explain where the massive spinning…