AAS NOVA — Research Highlights 2020

Find out the latest thinking about our universe.
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Alignment of a Star and a Planet

Post by bystander » Thu Jul 02, 2020 6:06 pm

Alignment of a Star and a Planet
NOVA | American Astronomical Society | 2020 Jun 29
Susanna Kohler wrote:
The planets in our solar system all orbit in roughly the same direction as the Sun spins — but this isn’t true for all planetary systems! Recent measurements of the spin angle of a nearby, planet-hosting star provide new insight into how solar systems form. ...

Spin–Orbit Alignment of the β Pictoris Planetary System ~ Stefan Kraus et al
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A Young Population of Hidden Jets

Post by bystander » Thu Jul 02, 2020 6:15 pm

A Young Population of Hidden Jets
NOVA | American Astronomical Society | 2020 Jul 01
Susanna Kohler wrote:
Looking for a fireworks show this 4th of July? Try checking out the distant universe, where powerful jets flung from supermassive black holes slam into their surroundings, lighting up the sky. Though these jets are hidden behind shrouds of gas and dust, a new study has now revealed some of these young powerhouses. ...

High-resolution VLA Imaging of Obscured Quasars:
Young Radio Jets Caught in a Dense ISM
~ Pallavi Patil et al
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An Update on the Mysterious Flashes of FRB 180916

Post by bystander » Fri Jul 10, 2020 11:02 pm

An Update on the Mysterious Flashes of FRB 180916
NOVA | American Astronomical Society | 2020 Jul 08
Susanna Kohler wrote:
Earlier this year, we gained new insight into the origins of fast radio bursts (FRBs) when FRB 180916 became the first of these strange sources observed to exhibit repeated bursts in a periodic pattern.

Now, we’re taking a look at four recent studies detailing some of the latest observations and theories of FRB 180916 — and what this tells us about the population of FRBs as a whole. ...

Detection of Repeating FRB 180916.J0158+65 Down to Frequencies of 300 MHz ~ P. Chawla et al The Lowest-frequency Fast Radio Bursts: Sardinia Radio Telescope
Detection of the Periodic FRB 180916 at 328 MHz
~ M. Pilia et al Periodic Fast Radio Bursts with Neutron Star Free Precession ~ J. J. Zanazzi, Dong Lai Precessing Flaring Magnetar as a Source of Repeating FRB 180916.J0158+65 ~ Yuri Levin, Andrei M. Beloborodov, Ashley Bransgrove
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Shining Bright Through the Ages

Post by bystander » Fri Jul 10, 2020 11:09 pm

Shining Bright Through the Ages
NOVA | American Astronomical Society | 2020 Jul 10
Tarini Konchady wrote:
Accurate distance measurements are critical to astronomy. A Type Ia supernova is one of the few objects that we can trust for making distance measurements since they have a fixed peak brightness. But can the brightness of such a supernova change significantly based on the properties of its host galaxy? And what does this mean for our understanding of dark energy? ...

Evidence for Cosmic Acceleration Is Robust to Observed Correlations
between Type Ia Supernova Luminosity and Stellar Age
~ B. M. Rose et al
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Evidence for an Ancient Martian Ocean

Post by bystander » Sat Jul 18, 2020 3:46 pm

Evidence for an Ancient Martian Ocean
NOVA | American Astronomical Society | 2020 Jul 13
Susanna Kohler wrote:
Was Mars once partially covered in ancient seas? A recent study has found new evidence to support the Mars ocean hypothesis. ...

Evidence for an Ancient Sea Level on Mars ~ Abbas Ali Saberi
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Bent Crystals and Solar Flares

Post by bystander » Sat Jul 18, 2020 3:52 pm

Bent Crystals and Solar Flares
NOVA | American Astronomical Society | 2020 Jul 15
Susanna Kohler wrote:
In 1984, a rescue mission took place in space — ultimately saving a spacecraft that went on to make some of the most detailed observations we have of solar flares during a highly active solar cycle. Now, more than three decades later and thanks to some clever recalibration, we’re still reaping the rewards. ...

A Unique Resource for Solar Flare Diagnostic Studies: the SMM Bent Crystal Spectrometer ~ J. Sylwester et al
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A Stellar Flyby Makes Some Waves

Post by bystander » Sat Jul 18, 2020 3:59 pm

A Stellar Flyby Makes Some Waves
NOVA | American Astronomical Society | 2020 Jul 17
Susanna Kohler wrote:
The gaseous, dusty disks surrounding newly born stars can reveal a wealth of information about how distant stellar systems form and evolve. In a new study, scientists have now watched the interaction of two such disks in a stellar flyby. ...

Tidal Interaction between the UX Tauri A/C Disk System Revealed by ALMA ~ Luis A. Zapata et al
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Re: Bent Crystals and Solar Flares

Post by BDanielMayfield » Sat Jul 18, 2020 4:22 pm

bystander wrote:
Sat Jul 18, 2020 3:52 pm
Bent Crystals and Solar Flares
NOVA | American Astronomical Society | 2020 Jul 15
Susanna Kohler wrote:
In 1984, a rescue mission took place in space — ultimately saving a spacecraft that went on to make some of the most detailed observations we have of solar flares during a highly active solar cycle. Now, more than three decades later and thanks to some clever recalibration, we’re still reaping the rewards. ...

A Unique Resource for Solar Flare Diagnostic Studies: the SMM Bent Crystal Spectrometer ~ J. Sylwester et al
The NOVA AAS news report about this contains this remarkable, for an Astronomical publication, error:
The authors additionally improve other calibration aspects, ultimately producing high-resolution line spectra that they suggest could now be used as templates for the analysis and interpretation of future observed X-ray spectra — in particular, spectra gathered from other active, flaring stars in our solar system.
Does the American Astronomical Society not know that there is only one star in our solar system? :facepalm:
"Happy are the peaceable ... "

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The Contradiction of a Low-Mass Massive Black Hole

Post by bystander » Thu Jul 23, 2020 6:52 pm

The Contradiction of a Low-Mass Massive Black Hole
NOVA | American Astronomical Society | 2020 Jul 22
Susanna Kohler wrote:
The black holes we’ve observed in the universe typically fall into two categories: small star-sized black holes, and gargantuan black holes lurking at the centers of galaxies. Now, a new black-hole discovery sheds some light on the gray area between these extremes. ...

An Accreting, Anomalously Low-mass Black Hole at the Center of Low-mass Galaxy IC 750 ~ Ingyin Zaw et al
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There’s Metal in the Air

Post by bystander » Mon Jul 27, 2020 5:25 pm

There’s Metal in the Air
NOVA | American Astronomical Society | 2020 Jul 24
Tarini Konchady wrote:
With atmospheric temperatures ranging from roughly 3,000 to 6,500 degrees Fahrenheit, ultra-hot Jupiters are ready-made laboratories for extreme planetary science. For instance, any molecules in the atmosphere of an ultra-hot Jupiter will be broken down into their component atoms and ions. So what can be found in the atmosphere of the ultra-hot Jupiter WASP-121 b? ...

Neutral Cr and V in the Atmosphere of Ultra-hot Jupiter WASP-121 b ~ Maya Ben-Yami et al
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An Infant Pulsar Defies Categorization

Post by bystander » Tue Jul 28, 2020 2:58 pm

An Infant Pulsar Defies Categorization
NOVA | American Astronomical Society | 2020 Jul 27
Susanna Kohler wrote:
Pulsars have historically been classified into different categories — but the distinction between them may be blurrier than we thought. The discovery of the youngest pulsar yet observed is now raising questions about how we classify these extreme objects. ...

A Very Young Radio-Loud Magnetar ~ P. Esposito et al
viewtopic.php?t=40688
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