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Massive newborn star is firing two plasma jets at once

Popular Science

Breakthroughs, discoveries, and DIY tips sent every weekday. A newborn star 15,000 light-years from Earth is fascinating astronomers with its dual blasts of superheated plasma jets . The rare sight captured in stunning detail by the James Webb Space Telescope (JWST) isn't only a display of cosmic forces. It's helping solve a decades' long debate about the origins of massive stellar objects. Located at the edge of the Milky Way galaxy inside a nebula known as Sharpless 2-284 (Sh2-284), the young protostar is already upwards of 10 times the mass of our sun .


Newborn supernova spotted only hours after its explosive birth

Popular Science

Astronomers illustrated supernova SN 2024ggi in all of its gassy glory. This artist's impression shows a star going supernova. About 22 million light-years away the supernova, SN 2024ggi, exploded in the galaxy NGC 3621. Breakthroughs, discoveries, and DIY tips sent every weekday. According to their study recently published in the journal, their stellar accomplishment thanks to quick thinking and intense geometrical calculations is already providing clues to longstanding questions about some of the universe's most impressive and powerful events .


Supermassive black hole dubbed 'Scary Barbie' is tearing apart a giant star

Daily Mail - Science & tech

Supermassive black holes are known to be enormous objects that gobble up stars and spit out the cosmic remnants across the universe. But astronomers have now detected one that has such tremendous power it has produced one of the brightest displays ever seen. The remote object, dubbed'Scary Barbie' in a nod to its'absurd' and'terrifying' characteristics, has already burned incandescently for more than two years and shows no sign of sputtering out. If you take a typical supernova and multiply it a thousand times, we're still not at how bright this is -- and supernovas are among the most luminous objects in the sky,' said Danny Milisavljevic, an assistant professor of physics and astronomy in Purdue University's College of Science. 'This is the most energetic phenomenon I have ever encountered.'


James Webb Telescope snaps 'breathtaking' image of Orion Nebula that formed 4.5 billion years ago

Daily Mail - Science & tech

The Orion Nebula, which formed more than 4.5 billion years ago, is teeming with different colored gasses, molecular material, dust and scattered starlight and a new image snapped by NASA's James Webb Space Telescope (JWST) is the first to look at the cosmic formation's center, allowing researchers to better understand how massive stars are birthed by the colossal cloud of dust and gas. The image shows an open cluster of young massive stars that shape the cloud of dust and gas with its intense radiation and dense filaments that may play a key role in birthing new stars. The nebula was previously photographed by the Hubble Telescope in 2004, but this device uses visible light and its view was obscured by the large amounts of stardust. JWST, however, detects the infrared light of the cosmos, allowing observers to see through these layers of dust and peer into its cosmic center - a region that has just now been seen by human eyes. The Orion Nebula, which sits 1,350 light years from Earth, is said to be similar to our own solar system, which scientists believe could provide clues to what happened in the first million years of our planetary evolution. NASA's James Webb Space Telescope has captured the most detailed image of the Orion Nebula that sits 1,344 light years from Earth, which experts say could provide clues to the first few million years of our own solar system A nebula is the name given to a giant cloud in space made of dust, which are also areas that birth new stars - the Orion Nebula is believed to have created thousands of new stars.


Response to Comment on "An excess of massive stars in the local 30 Doradus starburst"

Science

Farr and Mandel reanalyze our data, finding initial mass function slopes for high-mass stars in 30 Doradus that agree with our results. However, their reanalysis appears to underpredict the observed number of massive stars. Their technique results in more precise slopes than in our work, strengthening our conclusion that there is an excess of massive stars ( 30 solar masses) in 30 Doradus. Farr and Mandel (1) reanalyzed the results of our study (2), in which we investigated the star formation history (SFH) and stellar initial mass function (IMF) of the local 30 Doradus (30 Dor) starburst in the Large Magellanic Cloud and found an overabundance of stars with initial mass exceeding 30 solar masses (M). They use an alternative and potentially more powerful statistical framework, hierarchical Bayesian inference, and infer IMF power-law indices for massive stars that are in agreement with our results (compare the IMF slope distributions in their figure 1 to the 1σ range inferred in our analysis).


Comment on "An excess of massive stars in the local 30 Doradus starburst"

Science

Schneider et al. (Reports, 5 January 2018, p. 69) used an ad hoc statistical method in their calculation of the stellar initial mass function. Adopting an improved approach, we reanalyze their data and determine a power-law exponent of . Alternative assumptions regarding dataset completeness and the star formation history model can shift the inferred exponent to and, respectively. They estimate the ages and masses of individual stars with the BONNSAI Bayesian code (3), then obtain an overall mass distribution by effectively adding together the posterior probability density functions of individual stars. There is no statistical meaning to a distribution obtained in this way, which does not represent the posterior probability density function on the mass distribution. Hierarchical Bayesian inference provides the statistically justified solution to this problem (4).


160 million years after the fact, telescope spots initial hours of supernova

The Japan Times

PARIS – A long time ago, in a galaxy far away, a supergiant red star ended its life in a spectacular explosion known as a supernova. The light from that event took 160 million years to reach Earth where, in a stroke of luck, robot telescopes scanning the night sky happened upon it on Oct. 6, 2013. On Monday, astronomers said the chance discovery allowed them to study the earliest phase of a supernova yet -- just three hours after it erupted. "We immediately knew that what we have in hand is extremely unique," Ofer Yaron of the Weizmann Institute of Science in Israel, lead author of a study in the journal Nature Physics, told AFP. "We managed to observe this event when (it was) very young." Scientists are keen to study the early phases of supernovae, seeking insights into the moments just before massive stars expire in such dramatic fashion.