Topic: Neutron Star
Washington, D.C. – Across NASA’s many missions, thousands of scientists, engineers, and other experts and professionals all over the country are doing what they do best, but now from home offices and via video conferencing.
With most personnel supporting missions remotely to keep onsite staff at a minimal level in response to Coronavirus (COVID-19), the Agency is moving ahead strongly with everything from space exploration to using our technology and innovation to help inform policy makers.
Huntsville, AL – A double star system has been flipping between two alter egos, according to observations with NASA’s Chandra X-ray Observatory and the National Science Foundation’s Karl F. Jansky Very Large Array (VLA).
Using nearly a decade and a half worth of Chandra data, researchers noticed that a stellar duo behaved like one type of object before switching its identity, and then returning to its original state after a few years. This is a rare example of a star system changing its behavior in this way.
NASA’s Chandra X-ray Observatory, Hubble Telescope, Spitzer Telescope photos used to make 3D image of Crab Nebula
Greenbelt, MD – Astronomers and visualization specialists from NASA’s Universe of Learning program have combined the visible, infrared and X-ray vision of NASA’s Great Observatories to create a three-dimensional representation of the dynamic Crab Nebula, the tattered remains of an exploded star.
The multiwavelength computer graphics visualization is based on images from the NASA Chandra X-ray Observatory, the NASA Hubble Space Telescope and the NASA Spitzer Space Telescope.
Greenbelt, MD – NASA’s Neutron star Interior Composition Explorer (NICER) telescope on the International Space Station detected a sudden spike of X-rays at about 9:04pm CDT on August 20th. The burst was caused by a massive thermonuclear flash on the surface of a pulsar, the crushed remains of a star that long ago exploded as a supernova.
The X-ray burst, the brightest seen by NICER so far, came from an object named SAX J1808.4-3658, or J1808 for short. The observations reveal many phenomena that have never been seen together in a single burst. In addition, the subsiding fireball briefly brightened again for reasons astronomers cannot yet explain.
NASA Jet Propulsion Laboratory
Pasadena, CA – In the nearby Whirlpool galaxy and its companion galaxy, M51b, two supermassive black holes heat up and devour surrounding material. These two monsters should be the most luminous X-ray sources in sight, but a new study using observations from NASA’s NuSTAR (Nuclear Spectroscopic Telescope Array) mission shows that a much smaller object is competing with the two behemoths.
The most stunning features of the Whirlpool galaxy – officially known as M51a – are the two long, star-filled “arms” curling around the galactic center like ribbons. The much smaller M51b clings like a barnacle to the edge of the Whirlpool. Collectively known as M51, the two galaxies are merging.
Written by Jeanette Kazmierczak
Greenbelt, MD – A brief and unusual flash spotted in the night sky on June 16th, 2018, puzzled astronomers and astrophysicists across the globe. The event – called AT2018cow and nicknamed “the Cow” after the coincidental final letters in its official name – is unlike any celestial outburst ever seen before, prompting multiple theories about its source.
Over three days, the Cow produced a sudden explosion of light at least 10 times brighter than a typical supernova, and then it faded over the next few months.
NASA’s Goddard Space Flight Center
Greenbelt, MD – About a year ago, astronomers excitedly reported the first detection of electromagnetic waves, or light, from a gravitational wave source. Now, a year later, researchers are announcing the existence of a cosmic relative to that historic event.
The discovery was made using data from telescopes including NASA’s Chandra X-ray Observatory, Fermi Gamma-ray Space Telescope, Neil Gehrels Swift Observatory, the NASA/ESA Hubble Space Telescope, and the Discovery Channel Telescope (DCT).
Written by Francis Reddy
Greenbelt, MD – An international team of scientists studying what amounts to a computer-simulated “pulsar in a box” are gaining a more detailed understanding of the complex, high-energy environment around spinning neutron stars, also called pulsars.
The model traces the paths of charged particles in magnetic and electric fields near the neutron star, revealing behaviors that may help explain how pulsars emit gamma-ray and radio pulses with ultraprecise timing.
Washington, D.C. – An unusual infrared light emission from a nearby neutron star detected by NASA’s Hubble Space Telescope could indicate new features never before seen. One possibility is that there is a dusty disk surrounding the neutron star; another is that there is an energetic wind coming off the object and slamming into gas in interstellar space the neutron star is plowing through.
Although neutron stars are generally studied in radio and high-energy emissions, such as X-rays, this study demonstrates that new and interesting information about neutron stars can also be gained by studying them in infrared light, say researchers.
Written by Jeanette Kazmierczak
Greenbelt, MD – Scientists analyzing the first data from the Neutron star Interior Composition Explorer (NICER) mission have found two stars that revolve around each other every 38 minutes — about the time it takes to stream a TV drama.
One of the stars in the system, called IGR J17062–6143 (J17062 for short), is a rapidly spinning, superdense star called a pulsar. The discovery bestows the stellar pair with the record for the shortest-known orbital period for a certain class of pulsar binary system.
The data from NICER also show J17062’s stars are only about 186,000 miles (300,000 kilometers) apart, less than the distance between Earth and the Moon.
© 2006-2020 Clarksville, TN Online is owned and operated by residents of Clarksville Tennessee.