PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Can super-Earth interior dynamics set the table for habitability?

Are super-Earths capable of creating conditions that are hospitable for life to arise and thrive?

Can super-Earth interior dynamics set the table for habitability?
2021-02-09
(Press-News.org) Washington, DC-- New research led by Carnegie's Yingwei Fei provides a framework for understanding the interiors of super-Earths--rocky exoplanets between 1.5 and 2 times the size of our home planet--which is a prerequisite to assess their potential for habitability. Planets of this size are among the most abundant in exoplanetary systems. The paper is published in Nature Communications.

"Although observations of an exoplanet's atmospheric composition will be the first way to search for signatures of life beyond Earth, many aspects of a planet's surface habitability are influenced by what's happening beneath the planet's surface, and that's where Carnegie researcher's longstanding expertise in the properties of rocky materials under extreme temperatures and pressures comes in," explained Earth and Planets Laboratory Director Richard Carlson.

On Earth, the interior dynamics and structure of the silicate mantle and metallic core drive plate tectonics, and generate the geodynamo that powers our magnetic field and shields us from dangerous ionizing particles and cosmic rays. Life as we know it would be impossible without this protection. Similarly, the interior dynamics and structure of super-Earths will shape the surface conditions of the planet.

With exciting discoveries of a diversity of rocky exoplanets in recent decades, are much-more-massive super-Earths capable of creating conditions that are hospitable for life to arise and thrive?

Knowledge of what's occurring beneath a super-Earth's surface is crucial for determining whether or not a distant world is capable of hosting life. But the extreme conditions of super-Earth-mass planetary interiors challenge researchers' ability to probe the material properties of the minerals likely to exist there.

That's where lab-based mimicry comes in.

For decades, Carnegie researchers have been leaders at recreating the conditions of planetary interiors by putting small samples of material under immense pressures and high temperatures. But sometimes even these techniques reach their limitations.

"In order to build models that allow us to understand the interior dynamics and structure of super-Earths, we need to be able to take data from samples that approximate the conditions that would be found there, which could exceed 14 million times atmospheric pressure," Fei explained. "However, we kept running up against limitations when it came to creating these conditions in the lab. "

A breakthrough occurred when the team--including Carnegie's Asmaa Boujibar and Peter Driscoll, along with Christopher Seagle, Joshua Townsend, Chad McCoy, Luke Shulenburger, and Michael Furnish of Sandia National Laboratories--was granted access to the world's most powerful, magnetically-driven pulsed power machine (Sandia's Z Pulsed Power Facility) to directly shock a high-density sample of bridgmanite--a high-pressure magnesium silicate that is believed to be predominant in the mantles of rocky planets--in order to expose it to the extreme conditions relevant to the interior of super-Earths.

A series of hypervelocity shockwave experiments on representative super-Earth mantle material provided density and melting temperature measurements that will be fundamental for interpreting the observed masses and radii of super-Earths.

The researchers found that under pressures representative of super-Earth interiors, bridgmanite has a very high melting point, which would have important implications for interior dynamics. Under certain thermal evolutionary scenarios, they say, massive rocky planets might have a thermally driven geodynamo early in their evolution, then lose it for billions of years when cooling slows down. A sustained geodynamo could eventually be re-started by the movement of lighter elements through inner core crystallization.

"The ability to make these measurements is crucial to developing reliable models of the internal structure of super-Earths up to eight times our planet's mass," Fei added. "These results will make a profound impact on our ability to interpret observational data."

INFORMATION:

The project is partially supported by a Carnegie Venture Grant and the U.S. National Science Foundation.

The project is made possible by the Z Fundamental Science Program.


[Attachments] See images for this press release:
Can super-Earth interior dynamics set the table for habitability?

ELSE PRESS RELEASES FROM THIS DATE:

Researching ways to improve sustainability and reduce waste in the seafood industry

2021-02-09
Nutritionists have been touting the health benefits of seafood for years. Dietary guidelines recommend that the average adult get at least two servings of seafood per week. But the push to increase our consumption of seafood can put a strain on the seafood industry and create more waste. "Many fisheries are fully or overexploited," said Lekelia "Kiki" Jenkins, an associate professor at Arizona State University's School for the Future of Innovation in Society in the College of Global Futures. "We are pushing our fisheries to the brink that they can sustain. Meanwhile, consumers are wasting nearly half of the fish they buy. We need to understand our waste behaviors and put a mechanism into place so that we use what we catch." Jenkins is researching ways to improve sustainability in ...

Sonoporation: Underlying mechanisms and applications in cellular regulation

2021-02-09
Announcing a new article publication for BIO Integration journal. In this review article the authors Yue Li, Zhiyi Chen and Shuping Ge from First Affiliated Hospital of University of South China, Hengyang, China and Tower Health and Drexel University, Philadelphia, PA, USA summarize current state of the art applications of microbubble-cell interactions and sonoporation effects to cellular functions. Ultrasound combined with microbubble-mediated sonoporation has been applied to enhance drug or gene intracellular delivery. Sonoporation leads to the formation of openings in the cell membrane, triggered by ultrasound-mediated oscillations and destruction of microbubbles. Multiple mechanisms are involved in the occurrence ...

Nanocarriers in the enhancement of therapeutic efficacy of natural drugs

2021-02-09
Announcing a new article publication for BIO Integration journal. In this review article the authors Xiuling Li, Shunung Liang, Chee Hwee Tan, Shuwen Cao, Xiaoding Xu, Phei Er Saw and Wei Tao from Sun Yat-sen University, Guangzhou, China, Guangzhou University of Chinese Medicine, Guangzhou, China and Center for Harvard Medical School, Boston, MA, USA discuss the potential benefits of four plants endogenous to China and the enhancement of their therapeutic efficacy by nanotechnology intervention. Plant derived natural products have been used for the treatment of various human diseases long before the intervention of modern medicine. The basis of modern medicine is still inspired by traditional medicine and therapies. However, ...

Scientists urge for investment now in highly potent vaccines to prevent the next pandemic

2021-02-09
LA JOLLA, CA--As new COVID-19 variants begin to throw vaccine efficacy in question, two leading scientists are calling for health agencies to invest in the development of vaccines that would be broadly effective against many different variants and strains of potential pandemic viruses. In a END ...

Scientists create flexible biocompatible cilia that can be controlled by a magnet

Scientists create flexible biocompatible cilia that can be controlled by a magnet
2021-02-09
Researchers at the University of Campinas's Chemistry Institute (IQ-UNICAMP) in the state of São Paulo, Brazil, have developed a template-free technique to fabricate cilia of different sizes that mimic biological functions and have multiple applications, from directing fluids in microchannels to loading material into a cell, for example. The highly flexible cilia are based on polymer-coated iron oxide nanoparticles, and their motion can be controlled by a magnet. In nature, cilia are microscopic hairlike structures found in large numbers on the surface of certain cells, causing currents ...

Can current smartphone technology tell you when a pandemic might come calling?

2021-02-09
Photoplethysmography (PPG) is a simple optical technique used to detect volumetric changes in peripheral blood circulation. It's used in smart watches, for example, to monitor pulse and heart rate, but PPG biosensors are also found in millions of smartphones, but without any current clinical applications. In a study published online in the February 2021 issue of Chest, researchers at University of California San Diego School of Medicine, with industry collaborators, found that already embedded PPG in smartphones, in tandem with application software, could be used for remote clinical pulse oximetry to manage chronic cardiopulmonary disease and perhaps initial treatment and monitoring of persons affected in respiratory viral pandemics, such as COVID-19. "Pulse oximetry monitoring ...

Design and deployment of COVID-19 technology responses and finding ways to make things

2021-02-09
As governments try to mitigate the spread of COVID-19, many are turning to contact tracing, including apps that track your location and electronic check-in QR codes. But with that technology come questions of personal safety, privacy, trust, control and collective action. So what can be done to improve these large-scale technological system roll-outs without infringing on a citizen's right to privacy? "These systems are logging your physical social network," said Katina Michael, an Arizona State University professor at the School for the Future of Innovation in Society in the College of Global Futures and the School of Computing, Informatics and Decision Systems Engineering in the Ira A. Fulton Schools of Engineering. "The physical has become more ...

Shining a light on the true value of solar power

Shining a light on the true value of solar power
2021-02-09
Beyond the environmental benefits and lower electric bills, it turns out installing solar panels on your house actually benefits your whole community. Value estimations for grid-tied photovoltaic systems prove solar panels are beneficial for utility companies and consumers alike. For years some utility companies have worried that solar panels drive up electric costs for people without panels. Joshua Pearce, Richard Witte Endowed Professor of Materials Science and Engineering and professor of electrical and computer engineering at Michigan Technological University, has shown the opposite is true -- grid-tied solar photovoltaic (PV) owners are actually subsidizing their non-PV ...

Super-Earth atmospheres probed at Sandia's Z machine

Super-Earth atmospheres probed at Sandias Z machine
2021-02-09
ALBUQUERQUE, N.M. -- The huge forces generated by the Z machine at Sandia National Laboratories are being used to replicate the gravitational pressures on so-called "super-Earths" to determine which might maintain atmospheres that could support life. Astronomers believe that super-Earths -- collections of rocks up to eight times larger than Earth -- exist in the millions in our galaxy. "The question before us is whether any of these super planets are actually Earthlike, with active geological processes, atmospheres and magnetic fields," said Sandia physicist Joshua Townsend. The current ...

Low carbon transport at sea: Ferries voyage optimization in the Adriatic

Low carbon transport at sea: Ferries voyage optimization in the Adriatic
2021-02-09
Energy efficiency or carbon intensity (defined as CO2 emissions per transport work, ed.) is a possible point of convergence between the International Maritime Organization (IMO) and EU regulations to cut GHG emissions and decarbonize shipping. Short term measures to increase energy efficiency and achieve carbon intensity savings include voyage optimization. A new study led by the CMCC Foundation, realized in the framework of the Interreg Italy-Croatia END ...

LAST 30 PRESS RELEASES:

New technology points to unexpected uses for snoRNA

Racial and ethnic variation in survival in early-onset colorectal cancer

Disparities by race and urbanicity in online health care facility reviews

Exploring factors affecting workers' acquisition of exercise habits using machine learning approaches

Nano-patterned copper oxide sensor for ultra-low hydrogen detection

Maintaining bridge safer; Digital sensing-based monitoring system

A novel approach for the composition design of high-entropy fluorite oxides with low thermal conductivity

A groundbreaking new approach to treating chronic abdominal pain

ECOG-ACRIN appoints seven researchers to scientific committee leadership positions

New model of neuronal circuit provides insight on eye movement

Cooking up a breakthrough: Penn engineers refine lipid nanoparticles for better mRNA therapies

CD Laboratory at Graz University of Technology researches new semiconductor materials

Animal characters can boost young children’s psychological development, study suggests

South Korea completes delivery of ITER vacuum vessel sectors

Global research team develops advanced H5N1 detection kit to tackle avian flu

From food crops to cancer clinics: Lessons in extermination resistance

Scientists develop novel high-fidelity quantum computing gate

Novel detection technology alerts health risks from TNT metabolites

New XR simulator improves pediatric nursing education

New copper metal-organic framework nanozymes enable intelligent food detection

The Lancet: Deeply entrenched racial and geographic health disparities in the USA have increased over the last two decades—as life expectancy gap widens to 20 years

2 MILLION mph galaxy smash-up seen in unprecedented detail

Scientists find a region of the mouse gut tightly regulated by the immune system

How school eligibility influences the spread of infectious diseases: Insights for future outbreaks

UM School of Medicine researchers link snoring to behavioral problems in adolescents without declines in cognition

The Parasaurolophus’ pipes: Modeling the dinosaur’s crest to study its sound #ASA187

St. Jude appoints leading scientist to create groundbreaking Center of Excellence for Structural Cell Biology

Hear this! Transforming health care with speech-to-text technology #ASA187

Exploring the impact of offshore wind on whale deaths #ASA187

Mass General Brigham and BIDMC researchers unveil an AI protein engineer capable of making proteins ‘better, faster, stronger’

[Press-News.org] Can super-Earth interior dynamics set the table for habitability?
Are super-Earths capable of creating conditions that are hospitable for life to arise and thrive?