Medical and Hospital News
TIME AND SPACE
New Insights into Cosmic Dawn: First Stars Shape the Early Universe
illustration only
New Insights into Cosmic Dawn: First Stars Shape the Early Universe
by Simon Mansfield
Sydney, Australia (SPX) Mar 22, 2024

Advanced simulations on supercomputers, led by Dr. Ke-Jung Chen of the Institute of Astronomy and Astrophysics, Academia Sinica (ASIAA), have unveiled how the masses of the earliest stars critically influenced the characteristics of the universe's first galaxies. Published in the Astrophysical Journal, this research marks a significant advancement in understanding the early cosmos.

About 200-400 million years following the Big Bang, the universe witnessed its "cosmic dawn," transitioning from darkness to light with the ignition of the first stars and galaxies. This era began the complex structuring of the cosmos, driven by dark matter halos. These halos captured primordial gases to form the universe's earliest stars within mini dark matter halos, each about a million solar masses.

The transition from the first stars to the formation of the first galaxies is a key focus in astrophysics. As dark matter halos grew to about a billion solar masses, they could sustain ongoing star formation, marking the birth of the first galaxies. The development of these galaxies was significantly influenced by the feedback from first stars and their supernovae, affecting the chemical and physical dynamics of the early universe.

Dr. Chen and his team used high-resolution three-dimensional radiation hydrodynamics simulations, integrated with detailed supernova physics, to model these early galaxies. Their findings highlight that the masses of the first stars are a decisive factor in the formation and evolution of the first galaxies. Supernovae from massive first stars produced metals that cooled the primordial gas, enabling the formation of second-generation stars. Unlike the Milky Way, these early galaxies were irregular in shape and lacked rotational support.

The central areas of these galaxies could host hundreds to thousands of second-generation stars, with gas metallicity enriched to about 0.01 solar metallicity. Interestingly, first stars were likely not a dominant component of most early galaxies, as the gas in massive halos was often already enriched with metals from previous supernovae.

This research not only sheds light on the transition from the first stars to the emergence of the first galaxies but also sets the stage for future observations by the James Webb Space Telescope (JWST) and next-generation ground-based telescopes, aiming to directly detect these ancient cosmic structures.

Research Report:"How Population III Supernovae Determined the Properties of the First Galaxies,"

Related Links
Cosmic Explosion Group at SINICA
Understanding Time and Space

Subscribe Free To Our Daily Newsletters
Tweet

RELATED CONTENT
The following news reports may link to other Space Media Network websites.
TIME AND SPACE
New Map Unveils the Cosmic Tapestry of 1.3 Million Quasars
Los Angeles CA (SPX) Mar 19, 2024
In an astronomical feat, scientists have created the most expansive map yet of the universe's supermassive black holes, known as quasars, marking a significant leap in our understanding of these cosmic behemoths. The map reveals the location of approximately 1.3 million quasars, with the most distant ones illuminating the cosmos at a time when it was just 1.5 billion years old, a stark contrast to its current age of 13.7 billion years. David Hogg, a key figure in the map's creation and a senior re ... read more

TIME AND SPACE
Lessons from Fukushima: Prepare for the unlikely

Rafah displaced shiver as thunder and rain lash tent camp

Critical aid, food delivered by sea to starving families in war-torn northern Gaza

Syria's Al-Hol camp: child inmates and false identities

TIME AND SPACE
GMV Spearheads ESA's Mission to Revolutionize Satellite Navigation with LEO Technology

Genesis and LEO-PNT: Pioneering the future of precision navigation

Aerospacelab and Xona Unite to Transform Satellite Navigation

Genesis will measure Earth in millimetric detail from space

TIME AND SPACE
No 'human era' in Earth's geological history, scientists say

Enhancing AI Truth Detection: A New Approach Against Economic Deceit

How the brain coordinates speaking and breathing

Becoming human: An ancient genome perspective

TIME AND SPACE
Indonesia hunts clues as study suggests Javan tiger may still exist

Sixteen bear cubs rescued from home in Laos

Yale Scientists Uncover Earth's Hidden Bioelectric System

Darwin's Galapagos island species, protected yet still at risk

TIME AND SPACE
US conspiracy theorists monetize 'Disease X' misinformation

Malaria jab rollout in Cameroon a 'turning point': Gavi

TIME AND SPACE
Hong Kong scraps early release for national security convicts

China tries to block NGO tribute to dead dissident at UN

Hong Kong's new national security law comes into force

Apple CEO in China ahead of Shanghai store opening

TIME AND SPACE
Ecuador mayor killed amid anti-gang state of emergency

French navy seizes 10.7 tonnes of cocaine off African coast

California border patrol officers seize thousands of pounds of drugs this week

Indian navy frees Iranian fishing boat hijacked off Somalia

TIME AND SPACE
Subscribe Free To Our Daily Newsletters




The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.