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The FINANCIAL A group of astronomers has discovered 8 millisecond pulsars located within the dense clusters of stars, known as “globular clusters , using South Africa’s MeerKAT radio telescope.
According to The University of Manchester, millisecond pulsars are neutron stars, the most compact star known, that spin up to 700 times per second. This is the first pulsar discovery using the MeerKAT antennas and it comes from the synergic work of two international collaborations, TRAPUM and MeerTIME, with the findings detailed in a Monthly Notices of the Royal Astronomical Society paper published today.
Millisecond pulsars are extremely compact stars mainly made up of neutrons, and are amongst the most extreme objects in the universe: they pack hundreds of thousands of times the mass of the Earth in a sphere with a diameter of about 24 km; and spin at a rate of hundreds of rotations per second. They emit a beam of radio waves that are detected by the observer at every
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IMAGE: This composite combines radio (orange) and infrared images of the W49A molecular cloud, where young stars are forming. view more
Credit: CREDIT: DePree, et al.; Sophia Dagnello, NRAO/AUI/NSF; Spitzer/NASA.
This overlay shows radio (orange) and infrared images of a giant molecular cloud called W49A, where new stars are being formed. A team of astronomers led by Chris DePree of Agnes Scott College used the National Science Foundation s Karl G. Jansky Very Large Array (VLA) to make new, high-resolution radio images of this cluster of still-forming, massive stars. W49A, 36,000 light-years from Earth, has been studied for many decades, and the new radio images revealed some tantalizing changes that have occurred since an earlier set of VLA observations in 1994 and 1995.
A group of astronomers has discovered 8 millisecond pulsars located within the dense clusters of stars, known as “globular clusters'', using South Africa’s MeerKAT radio telescope.Millisecond pulsars are neutron stars, the most compact star known, th
15 years of radar measurements provide new information on planet’s spin, internal structure
NASA/JPL-Caltech
Fundamentals such as how many hours are in a Venusian day provide critical data for understanding the divergent histories of Venus and Earth, UCLA researchers say. Christopher Crockett |
April 29, 2021
Venus is an enigma. It’s the planet next door and yet reveals little about itself. An opaque blanket of clouds smothers a harsh landscape pelted by acid rain and baked at temperatures that can liquify lead.
Now, new observations from the safety of Earth are lifting the veil on some of Venus’ most basic properties. By repeatedly bouncing radar off the planet’s surface over the last 15 years, a UCLA-led team has pinned down the precise length of a day on Venus, the tilt of its axis and the size of its core. The findings are published today in the journal Nature Astronomy.
How long is a day on Venus? Scientists crack mysteries of our closest neighbor eurekalert.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eurekalert.org Daily Mail and Mail on Sunday newspapers.