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According to a report from the International Centre for Radio Astronomy Research (ICRAR), astronomers have found a powerful black hole, named MQ1, in the nearby galaxy M83. Previously, astronomers have located several compressed objects that are as powerful as MQ1, but have not been able to determine the size of the black hole contained within them until now.
Using several telescopes, the astronomers found that the MQ1 system is a standard-sized small black hole, as opposed to a somewhat larger version that was hypothesized to account for all its power.
“MQ1 is classed as a microquasar - a black hole surrounded by a bubble of hot gas, which is heated by two jets just outside the black hole, powerfully shooting out energy in opposite directions, acting like cosmic sandblasters pushing out on the surrounding gas,” noted team leader Dr. Roberto Soria, who is part of ICRAR, in a statement.
“The significance of the huge jet power measured for MQ1 goes beyond this particular galaxy: it helps astronomers understand and quantify the strong effect that black hole jets have on the surrounding gas, which gets heated and swept away,” he added.
According to astronomers, the most powerful microquasar in the Milky Way, called SS433, is approximately 10 times less powerful than MQ1.
With the help of NASA’s Hubble Space Telescope, astronomers determined that the jets around the MQ1 structure extend approximately 20 light years from either side of the black hole.
MQ1 is a stellar-mass black hole, meaning that it is less than approximately 70 times the mass of our Sun, and was likely formed when a star died, collapsing to leave behind a compact mass. NASA notes that stellar-mass black holes usually weigh between five and ten times the mass of our Sun.
The finding of MQ1 and its features is just one of the discoveries of the exhaustive study of galaxy M83.
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UKRAINE ON BRINK OF WAR
Ukraine put its military on high alert Sunday in response to Russia’s move to seize control of the Crimean Peninsula, and it threatened war against Moscow if the Kremlin made further incursions into Ukrainian territory as Western powers scrambled to find a response to the crisis.
“This is the red alert, this is not a threat, this is actually a declaration of war to my country,” Ukraine’s prime minister, Arseniy P. Yatsenyuk, told reporters in English, a day after Russia’s parliament approved the deployment of troops to any part of Ukraine where Moscow deems Russians are in danger. He warned that Ukraine was on the “brink of disaster” and appealed to the international community to stand by Kiev.
The new government in Kiev, hastily installed last week, wants to influence the thinking of President Vladimir V. Putin of Russia, an effort expected to continue later on Sunday when NATO holds an emergency meeting on Ukraine and British Foreign Secretary William Hague visits Kiev in a sign of Western support.
Before the NATO meeting, its secretary-general, Anders Fogh Rasmussen, told Russia to stop its military activity and threats against a sovereign Ukraine. “What Russia is doing now in Ukraine violates the principles of the United Nations Charter,” he said. “It threatens peace and security in Europe. Russia must stop its military activities and its threats.”
What began three months ago as a protest against the Ukrainian government has now turned into a big-power confrontation reminiscent of the Cold War and a significant challenge to international agreements on the sanctity of the borders of the post-Soviet nations.
In Crimea, the situation was calm but hardly placid on Sunday morning, with fewer soldiers visible on the streets. Some heavily armed soldiers without insignia had taken up positions around small Ukrainian military bases, but did not try to enter them.
At Perevalnoye, a small Ukrainian base some 15 miles south of Simferopol on the road to Yalta, hundreds of soldiers with masks, helmets and goggles, in unmarked uniforms, surrounded the base, using vehicles with Russian plates. Inside about two dozen Ukrainian soldiers could be seen, equipped with an old BMP, a combination of a light tank and armored personnel carrier.
The Ukrainian commander, Col. Sergei Starozhenko, 38, told reporters the unmarked troops had arrived about 5 a.m. and “they want to block the base.” He said he expected them to bring reinforcements and call for talks. Asked how many men he has at his command, he said simply, “Enough.” After 15 minutes of conversation with what appeared to be a Russian officer, he said, “There won’t be war,” and returned inside, while the standoff continued.
In Sevastopol, pro-Russian “self-defense” forces blocked the entrances of the main Ukrainian naval headquarters. There was no sign of Russian troops, Ukrainian officers were at work inside and armed Ukrainians guards were on patrol behind the closed gates.
Pro-Russia demonstrators put up a banner reading: “Sevastopol without Fascism,” and urged Ukrainian officers to come over to their side rather than serve the “illegal fascist regime” in Kiev. The demonstrators shoved packs of cigarettes, candy and bottles of water through the gate for the Ukrainian guards.
“They have to make a choice -- they either obey the fascists in Kiev or the people,” said Sergei Seryogin, a pro-Russia activist outside. Kiev, he said, “is illegal power” and should be ignored by all military and civil officials.
At the Balaklava offices of the Ukrainian coast guard and border police, the Russian troop trucks that effectively besieged it on Saturday were gone. A member of the Sevastopol Council, Sergei Nepran, said that there had been an agreement with the Russians that the Ukrainians would remain in the office and not put out to sea. Mr. Nepran claimed that the Sevastopol police “have come over to the people” and are now under control of a new pro-Russian mayor, Anatoly Chaly. Mr Chaly, he said, had replaced a Kiev-appointed mayor who was forced to resign.
On Saturday, Russia took effective control of Crimea. Russian troops without identifying insignia but using military vehicles bearing the license plates of Russia’s Black Sea force encircled government buildings, closed the main airport and seized communication hubs, solidifying what began on Friday as a covert effort to control the largely pro-Russian region.
According to Kiev, Russia then flew in 6,000 more troops to a military airport. The civilian airports are now open again.
In Moscow, Mr. Putin on Saturday convened the upper house of Parliament to grant him authority to use force to protect Russian citizens and soldiers not only in Crimea but throughout Ukraine. Both actions - military and parliamentary - were a direct rebuff to President Obama, who on Friday pointedly warned Russia to respect Ukraine’s territorial integrity.
Mr. Obama accused Russia on Saturday of a “breach of international law” and condemned the country’s military intervention, calling it a “clear violation” of Ukrainian sovereignty.Russia kept up its propaganda campaign on Sunday in defense of the takeover, citing undefined threats to Russian citizens and proclaiming “massive defections” of Ukrainian forces in Crimea, which Western reporters said appeared to be unfounded.