Two years after producing the first-ever image of a black hole, an international team of researchers has released an updated view of the magnetic fields surrounding it — a development they say brings them one step closer to understanding the M87 galaxy’s ability to “launch energetic jets from its core.”
The Event Horizon Telescope said in a release that more than 300 researchers collaborated on the project and their findings were published Wednesday in two separate papers in The Astrophysical Journal.
For the first time, EHT scientists have mapped the magnetic fields around a black hole using polarized light waves. With this breakthrough, we have taken a crucial step in solving one of astronomy’s greatest mysteries.
Credit: EHT Collaboration#MagnetizedBlackHole #EHTBlackHole pic.twitter.com/sey42kAMSx
— Event Horizon ‘Scope (@ehtelescope) March 24, 2021
EHT scientists captivated the world in April 2019 when they released an image of the supermassive black hole at the center of galaxy Messier 87, which is located 55 million light-years away from Earth. The dramatic image shows a dark central region outlined by a bright ring-like structure, which scientists described at the time as “emission from hot gas swirling around it under the influence of strong gravity near its event horizon,” referring to the boundary marking the limits of the black hole. The new image captures that same view in polarized light, with brightly colored streaks of light corresponding with its magnetic field.
“We are now seeing the next crucial piece of evidence to understand how magnetic fields behave around black holes, and how activity in this very compact region of space can drive powerful jets that extend far beyond the galaxy,” said Monika Mościbrodzka, coordinator of the EHT Polarimetry Working Group and a professor at Radboud Universiteit in the Netherlands.
Bright jets of energy and matter emerge from M87’s core and extend at least 5,000 light-years from its center, according to EHT. Most of the matter lying close to the black hole’s edge falls in, but some of the surrounding particles manage to escape and get blasted far into space in the form of jets, a process that has long intrigued researchers.
Astronomers are still working to understand how jets larger than the galaxy itself are launched from the black hole within it. The newly released image of the black hole and its shadow in polarized light enables them to examine the activity-filled region just outside the black hole for the first time, researchers said.
“This work is a major milestone: the polarisation of light carries information that allows us to better understand the physics behind the image we saw in April 2019, which was not possible before,” said Iván Martí-Vidal, coordinator of the EHT Polarimetry Working Group and researcher at Spain’s Universitat de València.
Just as polarized sunglasses can help people see better by reducing reflections and glare, researchers explained, “astronomers can sharpen their vision of the region around the black hole by looking at how the light originating from there is [polarized].” With this new information, they can map the lines of the magnetic fields at the inner edge of the black hole to better understand their structure.
With these new findings, the team is now homing in on the role of strongly magnetized gas, EHT said.
Jason Dexter, coordinator of the EHT Theory Working Group and a professor at the University of Colorado Boulder, said the new observations indicate that the magnetic fields at the edge of the black hole are strong enough to “push back on the hot gas and help it resist gravity’s pull.”
“Only the gas that slips through the field can spiral inwards to the event horizon,” Dexter said.
The first polarized image of a black hole is the product of eight telescopes linked together around the world to create the virtual Earth-sized telescope, and years of work involving “complex techniques” in obtaining and analyzing data, according to researchers. And, they say, it’s just the beginning.
Dominic Pesce, a researcher at the Center for Astrophysics in Cambridge, Mass., said future observations will enable researchers to study how the magnetic field structure changes over time. In the meantime, the EHT itself will continue to expand.
“Even now we are designing a next-generation EHT that will allow us to make the first black hole movies,” said Sheperd Doeleman, founding director of the EHT. “Stay tuned for true black hole cinema.”
SpaceX lands NASA launch contract for mission to Jupiter's moon Europa – Euronews
By Steve Gorman
LOSANGELES – Elon Musk’s private rocket company SpaceX was awarded a $178 million launch services contract for NASA‘s first mission focusing on Jupiter’s icy moon Europa and whether it may host conditions suitable for life, the space agency said on Friday.
The Europa Clipper mission is due for blastoff in October 2024 on a Falcon Heavy rocket owned by Musk’s company, Space Exploration Technologies Corp, from NASA‘s Kennedy Space Center in Florida, NASA said in a statement posted online.
The contract marked NASA‘s latest vote of confidence in the Hawthorne, California-based company, which has carried several cargo payloads and astronauts to the International Space Station for NASA in recent years.
In April, SpaceX was awarded a $2.9 billion contract to build the lunar lander spacecraft for the planned Artemis program that would carry NASA astronauts back to the moon for the first time since 1972.
But that contract was suspended after two rival space companies, Jeff Bezos’s Blue Origin and defense contractor Dynetics Inc, protested against the SpaceX selection.
The company’s partly reusable 23-story Falcon Heavy, currently the most powerful operational space launch vehicle in the world, flew its first commercial payload into orbit in 2019.
NASA did not say what other companies may have bid on the Europa Clipper launch contract.
The probe is to conduct a detailed survey of the ice-covered Jovian satellite, which is a bit smaller than Earth’s moon and is a leading candidate in the search for life elsewhere in the solar system.
A bend in Europa’s magnetic field observed by NASA‘s Galileo spacecraft in 1997 appeared to have been caused by a geyser gushing through the moon’s frozen crust from a vast subsurface ocean, researchers concluded in 2018. Those findings supported other evidence of Europa plumes.
Among the Clipper mission’s objectives are to produce high-resolution images of Europa’s surface, determine its composition, look for signs of geologic activity, measure the thickness of its icy shell and determine the depth and salinity of its ocean, NASA said.
NASA’s Europa Clipper will fly on SpaceX’s Falcon Heavy – The Verge
The Europa Clipper got the green light from NASA in 2015. It will fly by the moon 45 times, providing researchers with a tantalizing look at the icy world, believed to have an ocean lurking under its icy crust. The Clipper is equipped with instruments that will help scientists figure out if the moon could support life.
For years, the Clipper was legally obligated to launch on NASA’s long-delayed Space Launch System (SLS). But with the SLS perpetually delayed and over budget, NASA has urged Congress to consider allowing the Europa Clipper to fly commercial. Switching to another vehicle could save up to $1 billion, NASA’s inspector general said in 2019.
NASA got permission to consider commercial alternatives to the SLS in the 2021 budget, and started officially looking for a commercial alternative soon after.
The SLS has powerful allies in Congress, who have kept the costly program alive for years, even as it blew past budgets and deadlines. The first flight of the SLS was originally supposed to happen in 2017. That mission — launching an uncrewed trip around the Moon — has since been pushed to November 2021, and keeping to that new schedule remains “highly unlikely” according to NASA’s Office of Inspector General, a watchdog agency.
SpaceX first launched its Falcon Heavy rocket in 2018, and started flying satellites in 2019. Earlier this year, NASA selected the rocket as the ride to space for two parts of a planned space station orbiting the Moon.
Researchers Develop Genome Techniques to Analyze Adaptation of Cattle – AZoCleantech
Jared Decker, a fourth-generation cattle farmer, has been aware of cattle suffering from health and productivity problems when they are moved from one location to another. The shift is from a region where they had spent generations to another place with a different climate, grass, or elevation.
Decker, as a researcher at the University of Missouri, looks at the chances of using science to resolve this issue, thereby serving a dual purpose to enhance the cattle’s welfare and sealing the leak in an almost $50 billion industry in the United States.
When I joined MU in 2013, I moved cattle from a family farm in New Mexico to my farm here in Missouri. New Mexico is hot and dry, and Missouri is also hot but has much more humidity. The cattle certainly didn’t do as well as they did in New Mexico, and that spurred me to think about how we could give farmers more information about what their animals need to thrive.
Jared Decker, Associate Professor and Wurdack Chair, Animal Genetics, College of Agriculture, Food and Natural Resources
The study was published in the journal PLOS Genetics on July 23rd, 2021.
Decker and his research team have revealed the proof exposing the fact that cattle are losing their key environmental adaptations. The researchers regard this as a loss due to the lack of genetic information available to farmers.
After assessing the genetic materials dating back to the 1960s, the team determined particular DNA variations linked with adaptations that could someday be used to develop DNA tests for cattle. These tests could help educate the farmers regarding the adaptability of cattle from one environment or another.
We can see that, for example, historically cows in Colorado are likely to have adaptations that ease the stress on their hearts at high altitudes. But if you bring in bulls or semen from a different environment, the frequency of those beneficial adaptations is going to decrease. Over generations, that cow herd will lose advantages that would have been very useful to a farmer in Colorado.
Jared Decker, Associate Professor and Wurdack Chair, Animal Genetics, College of Agriculture, Food and Natural Resources, University of Missouri
The research team included then-doctoral student Troy Rowan who had examined 60 years’ worth of bovine DNA data from tests of cryo-preserved semen produced by cattle breed associations. They observed that, as time runs, the genes related to higher fertility and productivity increased as a result of careful selection by farmers. Also, many genes relating to environmental adaptations have decreased.
According to Decker, the farmers are not to be blamed as there are no affordable methods available at present to identify the suitability of cattle for a specific environment. The study also proposes easy-to-use cattle DNA tests that focus on the particular adaptations identified in the study.
Such adaptations include resistance to vasoconstriction, which is a process of blood vessel narrowing that takes place at high elevation and puts excessive stress on the heart. Also creating resistance to the toxin in the grass can result in vasoconstriction and tolerance for increased temperature or humidity. All these factors tend to decline over generations when the cattle are shifted from the associated surroundings.
Sometimes, natural and artificial selection are moving in the same direction, and other times there is a tug of war between them. Efficiency and productivity have vastly improved in the last 60 years, but environmental stressors are never going to go away. Farmers need to know more about the genetic makeup of their herd, not only for the short-term success of their farm, but for the success of future generations.
Jared Decker, Associate Professor and Wurdack Chair, Animal Genetics, College of Agriculture, Food and Natural Resources
The first widely adopted genetic test for cattle was developed at the University of Missouri in 2007. Decker and Rowan are looking forward to giving further details of the development. Both the researchers grew up on farms with a desire to use research to help farmers to balance farm traditions of America with the requirement for eco-friendly business practices.
“As a society, we must produce food more sustainably and be good environmental stewards. Making sure a cow’s genetics match their environment makes life better for cattle and helps farmers run efficient and productive operations. It’s a win-win,” concluded Decker.
Rowan, T. N., et al. (2021) Powerful detection of polygenic selection and evidence of environmental adaptation in US beef cattle. PLOS Genetics. doi.org/10.1371/journal.pgen.1009652.
Canada could avoid the worst of a 4th wave — but we're not out of the woods yet – CBC.ca
Delta variant of COVID-19 now makes up nearly 4 in 10 cases in B.C., data shows – Global News
‘It’s 2021, it’s not 1950:’ Women politicians in N.S. show support for Robyn Ingraham – Global News
Silver investment demand jumped 12% in 2019
Europe kicks off vaccination programs | All media content | DW | 27.12.2020 – Deutsche Welle
Iran anticipates renewed protests amid social media shutdown
News15 hours ago
Coronavirus: Health Canada recalls 2 more hand sanitizers – CTV News
Media21 hours ago
CBC grapples with how to program an Olympics in the social media age – The Globe and Mail
Health13 hours ago
Canada and Zimbabwe: Two Very Different Vaccination Campaigns – The Saxon
Sports19 hours ago
Canadiens’ salary cap situation heading into the draft & free agency – Habs Eyes on the Prize
News12 hours ago
Canada offers ‘path to protection’ for Afghan interpreters amid ‘critical’ situation – Global News
Media19 hours ago
Prominent Agencies And Marketers Are Ramping Up Their Ad Commitment To Minority-Owned Media – Forbes
Business22 hours ago
What you need to know about COVID-19 in Ottawa on Thursday, July 22 – CBC.ca
Real eState22 hours ago
Why hasn't climate change put a dent in luxury real estate? – BNN