In the southern Milky Way, a galaxy collision has been uncovered by an international team of astronomers, one of whom is Michelle Cluver from the University of the Western Cape. This is the closest such “collisional ring” galaxy system ever detected.
The team of astronomers, led by Prof. Quentin Parker at the University of Hong-Kong and Prof. Albert Zijlstra at the University of Manchester, includes Dr Michelle Cluver from the University of the Western Cape. Their peer-reviewed paper appeared today in the Monthly Notices of the Royal Astronomical Society publication and details the discovery and description of this galaxy “train wreck.” It has been dubbed “Kathryn’s wheel” both after the famous fireworks that the system resembles, but also after the wife of the paper’s second author.
Such cosmic fireworks are very rare and arise from “bulls-eye” collisions between two galaxies of similar mass. Shock waves from the collision compress previously dormant reservoirs of gas and trigger the formation of new stars. This creates a spectacular ring of intense emission, and lights up the system like a Catherine wheel firework.
Kathryn’s Wheel was discovered during a wide-field optical survey of the Milky Way. The survey had been looking for the remnants of dying stars in our Galaxy, and the authors were very surprised to also find this example of a cosmic “ring of fire”, only about 30 million light years from us. This makes it seven times closer than the previous nearest example, and forty times closer than the famous ‘Cartwheel’ example of such systems. The galaxy is located behind a dense star field and close to a very bright foreground star, which is likely why its true nature had not been noted before. In addition, this appears to be a relatively empty region of space, making the chances of such a collision at this location very low.
Professor Parker said, “Not only is this system visually stunning, but it is close enough to be an ideal target for detailed study. The ring is also quite low in mass – a few thousand million Suns or less than 1% of the Milky Way – so our discovery shows that collision rings can form around much smaller galaxies than we thought.”
Dr Cluver added: “Further detailed studies of this system will help us learn more about the physics of shocks under these conditions, which may apply to a range of different astrophysical phenomena. In particular we are interested in how energy is dissipated from shocks to star formation.”
Smaller galaxies are more common than large ones enabling the authors to revise upwards the estimated number of such curious but rare phenomena by a factor of ten. They also find that Kathryn’s Wheel is probably the nearest collisional ring.
Prof. Q.A.Parker, Dr D.J.Frew and Dr I.Bojicic (HKU)
Prof. Albert Zijlstra and Dr George Bendo (University if Manchester)
Dr. Milorad Stupar (University of Western Sydney/Macquarie University)
Dr Michelle Cluver (University of the Western Cape)
CES: So long, and thanks for all the beer!
Last week, the Las Vegas expo showed off its fun side with state-of-the-art technologies for enjoying beer, writes BRYAN TURNER
From craft beer-making machines to robots that pour beer, CES had more beer than usual in Las Vegas last week. And even free beer if you found the right stand. Stampede’s saloon-style booth offered beer to visitors who tried out its latest drones, virtual reality, and other gaming products. No beer tech, though.
Here are some of the beer technologies that stood out:
LG HomeBrew – Craft beer made at home
LG’s HomeBrew craft beer-making machine, debuted at CES 2019, brings the brewing process home thanks to single-use capsules, a self-cleaning feature, and an algorithm optimised for fermentation.
Like a Nespresso coffee machine, the beer maker uses capsules, which contain malt, yeast, hop oil and flavouring. At the press of a button, LG HomeBrew automates the whole procedure from fermentation and carbonation to ageing. A companion app lets users check HomeBrew’s status at any time during the process, from their handsets.
The beer machine not only offers a simple way to make craft
Designed with discerning beer lovers in mind, HomeBrew allows for in-home production of batches of more than 4 litres of beer in a variety of styles. The following five distinctive, flavoured beers are available now:
- Hoppy American IPA
- Golden American Pale Ale
- Full-bodied English Stout
- Zesty Belgian-style Witbier
- Dry Czech Pilsner
The only catch? It takes about two weeks to make, depending on the beer type.
“LG HomeBrew is the culmination of years of home appliance and water purification technologies that we’ve developed over the decades,” said Dan Song, president of LG Electronics Home Appliance & Air Solutions Company. “Homebrewing has grown at an explosive pace, but there are still many beer lovers who haven’t taken the jump because of the barriers to entry, like complexity, and these are the consumers we think will be attracted to LG HomeBrew.”
Click here to read about the party speaker that holds beer and robots that pour beer.
CES: Alienware gets Legend-ary
At CES in Las Vegas last week, Dell’s Alienware released a family of high-end, thin, light, and affordable machines for both amateur and professional gamers – and a new identity.
Alienware marked CES 2019 as a brand milestone with the debut of a new design identity, Alienware Legend. It aims to set a new bar of excellence for what gamers want most – performance and function. Alienware says it evaluated multiple concepts and chose one that was the biggest and boldest departure from its current look.
Alienware Legend, says the company, stays true to the brand’s core design tenets, taking cues from its deep roots in sci-fi culture and its early industrial designs, to distinguish the brand from the rest of the industry. The new Legend design is optimised with cutting-edge thermal cooling technology to achieve and sustain overclocking power, improved AlienFX lighting, and ultra-thin screen borders. It also unveiled a new “three-knuckle hinge” design that reduces the overall dimension while creating a stronger assembly, all combining to yield a better gaming experience.
“We’re excited to come to this year’s CES with some truly groundbreaking products, next-gen software and strategic partnerships that will bring more people to experience PC gaming and advance the industry,” said Frank Azor, vice president and general manager of Alienware. “The legend design answers the call for more and better from our gaming community, and the new G Series laptops will make PC gaming even more accessible to those looking for high-performance gaming at a cost they can appreciate.”
Click here to read about Alienware Legend in action with the Area-51m and m-series laptops