Nearly 40 researchers across Australia are eagerly awaiting data from Webb for their projects. Many of them are available to talk on Tuesday about what they hope to see with Webb and about their reaction to the first pictures
Continue reading Wow, wow, wow. Galaxies collide and tumble in a cosmic dance: Webb reactionsOver the past 30 years, Hubble has transformed science and culture, revealing a Universe of 200 billion galaxies. Webb will see further, solving today’s mysteries and creating new ones.
On Tuesday morning Joe Biden will release ‘the first picture’ then NASA will release a suite of images early Wednesday morning from the James Webb Space Telescope, the successor to Hubble.
Nearly 40 researchers across Australia are eagerly awaiting data from web for their projects. Many of them are available to talk on Tuesday about what they hope to see with Webb and about their reaction to the first pictures.
Much of the Webb data is flowing back to Earth through Tidbinbilla, and some comes from an instrument designed by Peter Tuthill at the University of Sydney. He is relieved and excited. “This is a day I have been looking forward to for a big part of my career. Everything about the Webb is so over-the-top audacious – from the titanic articulated mirror down to its orbit out in the cold voids of interplanetary space.”
Continue reading President Biden to release first pics from the $US10 billion James Webb Space Telescope Tuesday 12 JulyIn its early days, the Milky Way was like a giant smoothie, as if galaxies consisting of billions of stars, and an enormous amount of gas had been thrown together into a gigantic blender. But a new study picks apart this mixture by analysing individual stars to identify which originated inside the galaxy and which began life outside.
Continue reading What ingredients went into the galactic blender to create the Milky Way?Stars are giant factories that produce most of the elements in the Universe – including the elements in us, and in the Earth’s metal deposits. But what stars produce changes over time.
Two new papers published in MNRAS shed light on how the youngest generation of stars will eventually stop contributing metals back to the universe.
The authors are all members of ASTRO 3D, the ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions. They are based at Monash University, the Australian National University (ANU), and the Space Telescope Science Institute.
Continue reading Too much heavy metal stops stars producingThe early Universe was dark, filled with a hot soup of opaque particles. These condensed to form neutral hydrogen which coalesced to form the first stars in what astronomers call the Epoch of Reionisation (EoR).
“Finding the weak signal of this first light will help us understand how the early stars and galaxies formed,” says Dr Christene Lynch from ASTRO 3D, the ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions.
Dr Lynch is first author on a paper published in Publications of the Astronomical Society of Australia. She and her colleagues from Curtin University and the International Centre for Radio Astronomy Research have reduced the background noise in their observations allowing them to home in on the elusive signal.
Continue reading Closing in on the first light in the Universe
Galaxies pollute the environment they exist in, researchers have found.
A team of astronomers led by Alex Cameron and Deanne Fisher from the ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) used a new imaging system on at the WM Keck Observatory in Hawaii to confirm that what flows into a galaxy is a lot cleaner than what flows out.
The research is published today in The Astrophysical Journal.
Continue reading Galaxies pump out contaminated exhausts
A massive explosion from a previously unknown source – 10 times more energetic than a supernova – could be the answer to a 13-billion-year-old Milky Way mystery.
Astronomers led by David Yong, Gary Da Costa and Chiaki Kobayashi from Australia’s ARC Centre of Excellence in All Sky Astrophysics in 3 Dimensions (ASTRO 3D) based at the Australian National University (ANU) have potentially discovered the first evidence of the destruction of a collapsed rapidly spinning star – a phenomenon they describe as a “magneto-rotational hypernova”.
Continue reading New type of massive explosion explains mystery star
Astronomers have turned a cluster of galaxies into a gargantuan magnifying lens, using it to study another galaxy, 10.7 billion light years away, in unprecedented detail.
Taking advantage of a phenomenon known as “gravitational lensing”, the team of scientists, led by NASA Goddard Space Flight Centre scientist Dr Soniya Sharma, identified star forming regions in the distant and ancient galaxy.
The research was funded by Australia’s ARC Centre of Excellence in All Sky Astrophysics in 3 Dimensions (ASTRO 3D), and will be of direct benefit to NASA’s next orbiting observer.
Without the use of the massive magnifying effect, the galaxy, dubbed cswa128, would be a tiny blur to even the most powerful telescopes on Earth. With it, the astronomers can see stars being formed just three billion years after the Big Bang.
Continue reading Bend it like Einstein: Astronomers turn galaxies into magnifiers
The first detailed cross-section of a galaxy broadly similar to the Milky Way, published today, reveals that our galaxy evolved gradually, instead of being the result of a violent mash-up. The finding throws the origin story of our home into doubt.
The galaxy, dubbed UGC 10738, turns out to have distinct ‘thick’ and ‘thin’ discs similar to those of the Milky Way. This suggests, contrary to previous theories, that such structures are not the result of a rare long-ago collision with a smaller galaxy. They appear to be the product of more peaceful change.
And that is a game-changer. It means that our spiral galaxy home isn’t the product of a freak accident. Instead, it is typical.
Continue reading Milky Way not unusual, astronomers findIt will take until at least 2080 before women make up just one-third of Australia’s professional astronomers, an analysis published today in the journal Nature Astronomy reveals.
“Astronomers have been leaders in gender equity initiatives, but our programs are not working fast enough,” says Professor Lisa Kewley, director of the ARC Centre of Excellence for All-Sky Astrophysics in 3 Dimensions (ASTRO 3D).
Kewley is also an ARC Laureate Fellow at the Australian National University’s Research School for Astronomy and Astrophysics. She developed workforce forward modelling that can predict the fraction of women at all levels in astronomy from 2021 to 2060, given different initiatives in hiring or retention. The models show that Australia’s university leadership need to adopt 50:50 or affirmative action hiring and introduce exit surveys and retention initiatives.
“With these initiatives we can reach one-third women in 11 years, growing to 50 per cent in 25,” she said.
Continue reading More than 60 years to achieve gender equity?
