NASA’s Hubble reveals the blue lurker star in M67, shedding light on stellar mergers and evolution
A rare stellar phenomenon, termed the “blue lurker,” has been observed by NASA’s Hubble Space Telescope within the open star cluster M67, located approximately 2,800 light-years away. This star, part of a unique triple-star system, has captivated researchers due to its unusual evolutionary history. Identified for its accelerated spin rate and distinct characteristics, the blue lurker stands out among other stars in the cluster. Its rapid rotation, taking just four days, contrasts starkly with the typical 30-day rotation period of Sun-like stars.
Unveiling the Evolution of the Blue Lurker
According to reports fron an official press release by NASA, the blue lurker’s origins lie in a complex evolutionary process involving gravitational interactions within a triple-star system. Initially, two Sun-like stars formed a binary system while the blue lurker orbited at a distance. Roughly 500 million years ago, the binary stars merged, forming a more massive star. This giant star transferred material to the blue lurker, significantly increasing its rotation speed. Over time, the merged star evolved into a white dwarf, which the blue lurker now orbits.
Hubble’s Observations and Findings
Using ultraviolet spectroscopy, the Hubble Telescope detected the white dwarf companion, which displays a high surface temperature of about 12760 Degree Celsius and a mass of 0.72 solar masses. These measurements align with the hypothesis of a stellar merger in the system. The blue lurker itself exhibits subtle traits that differentiate it from other stars, such as being slightly bluer and brighter due to the mass transfer process.
Scientific Implications and Future Research
Emily Leiner, a researcher at the Illinois Institute of Technology, has emphasised the significance of this discovery, noting its contribution to understanding triple-star system dynamics. Such systems, comprising about 10 percent of Sun-like stars, offer insights into stellar evolution and the creation of exotic end products. While models explaining these processes remain incomplete, this detailed case provides a rare opportunity for astronomers to refine their theories.
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Two hikers accidentally discovered a treasure trove in Czech Republic . While taking a stroll in the forests surrounding Zvičina Hill in the Krkonoše Mountains near Poland’s border, they spotted an aluminium can and an iron box protruding slightly above the surface in a stone mound. The containers contained about 600 gold coins and a stunning assortment of gold artifacts. Discovery of this treasure worth more than $340,000 has drawn attention of researchers, arising questions about both the origin of the coins and how did they end up in such a remote location.
Tracing the origin of coins
According to the report by Vojtěch Brádle, a numismatist from the Museum of Eastern Bohemia, the majority of the coins were minted between 1808 and 1915. They originate from the Austria-Hungarian Empire, particularly under the reign of Emperor Franz Joseph I. Some of the coins feature countermarks minted in the Kingdom of Serbs, Croats, and Slovenians after the collapse of the Austro-Hungarian Empire.
The 598 coins cover a broad historical period, containing currency from France, Belgium, the Ottoman Empire, and Russia too. The range of provenances makes it difficult to track how the coins got to where they were, or just why they were stashed away at all. “It is hard to say whether it was Czech, German, or Jewish gold,” said Petr Grulich, director of the Museum of Eastern Bohemia, according to Dailymail.
Theories about the hiding place
There are several theories and speculation about how these coins and artifacts were hidden in such a remote location. One theory suggests that the items were concealed during Nazi Germany’s occupation of Czechoslovakia.
Following the Munich Agreement of 1938, large numbers of Jews and Czechs fled their homes in the annexed Sudetenland to escape persecution. Some historians believe that the treasure was buried during this time in an effort to protect it from the invading Nazi forces.
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On may 10th, a semitrailer delivered NASA’s Interstellar Mapping and Acceleration Probe or IMAP to the Astrotech space operations facility all the way from NASA’s Marshall Space Flight Center in Huntsville, Alabama. The IMAP mission is a modern-day celestial cartographer that will map the solar system by studying the heliosphere, a giant bubble created by the Sun’s solar wind that surrounds our solar system and protects it from harmful interstellar radiation. Tentatively scheduled for launch no earlier than fall 2025 on a SpaceX Falcon 9 rocket from Launch Complex 39A at NASA Kennedy, IMAP will be processed fuelled and encapsulated by the technicians in Astrotech facility.
About the mission
According to reported NASA’s blog, The IMAP mission will orbit the Sun at a location called Lagrange Point 1 (L1), which is about one million miles from Earth towards the Sun. From this location, IMAP can measure the local solar wind and scan the distant heliosphere without background from planets and their magnetic fields. The spacecraft will use 10 scientific instruments to study and map the heliosphere, a vast magnetic bubble surrounding the Sun protecting our solar system.
At NASA’s Marshall Space Flight Center, IMAP went through thermal vacuum testing at the X-ray and Cryogenic facility that simulates harsh conditions and dramatic temperature changes to simulate the environment during launch, on the journey toward the Sun.
Mission Management
IMAP is the fifth mission in NASA’s Solar Terrestrial Probes program portfolio. It is lead by Princeton University professor David J. McComas with an international team of 25 partner institutions. The spacecraft was built and operated from The Johns Hopkins Applied Physics Laboratory.
Information from this mission are expected to provide early warnings about space weather, which can affect human space explorers and technological systems like satellites and power grids that can affect life on Earth.
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