5G Technology World

  • 5G Technology and Engineering
  • FAQs
  • Apps
  • Devices
  • IoT
  • RF
  • Radar
  • Wireless Design
  • Learn
    • 5G Videos
    • Ebooks
    • EE Training Days
    • FAQs
    • Learning Center
    • Tech Toolboxes
    • Webinars/Digital Events
  • Handbooks
    • 2024
    • 2023
    • 2022
    • 2021
  • Resources
    • Design Guide Library
    • EE World Digital Issues
    • Engineering Diversity & Inclusion
    • Engineering Training Days
    • LEAP Awards
  • Advertise
  • Subscribe

The Evolution of Massive Galaxy Clusters

By Phys.org | January 24, 2017

Galaxy clusters have long been recognized as important laboratories for the study of galaxy formation and evolution. The advent of the new generation of millimeter and submillimeter wave survey telescopes, like the South Pole Telescope (SPT), has made it possible to identify faint galaxy clusters over large fractions of the sky using an effect first recognized by Rashid Sunyaev and Yakov Zel’dovich in 1969: When hot electrons in the cluster gas interact with light from the ubiquitous cosmic microwave background they increase its brightness very slightly.

SAO is a partner institution in the South Pole Telescope, which has been conducting a large survey covering about six percent of the whole sky with a sensitivity and angular resolution suitable for spotting galaxy clusters as far away as those from the epoch about four billion years after the big bang. One advantage of studying this sample of clusters is that because they have been identified from their hot gas signatures (rather than from the starlight of their member galaxies), the evolution of the cluster and its ensemble population is easier to disentangle.

CfA astronomer Brian Stalder and a team of colleagues used the SPT survey data to identify twenty-six of the most massive clusters known, each with a mass of over about a million billion solar-masses. They find that the clusters are broadly in agreement with the current thinking about the evolution of massive clusters and the stars in these galaxies. The models suggest a generally passive evolution (that is, without unusual disruptions by collisions or nuclear black hole feedback) and imply that most of the star formation and galaxy merging took place at an even earlier epoch than this sample covers. The scientists note, however, that a larger sample is needed to extend the conclusions, and it is currently being undertaken using other large optical telescopes including the Magellan twin 6.5 meter telescopes in Chile of which SAO is also a leading partner.


Filed Under: RF

 

Next Article

← Previous Article
Next Article →

Related Articles Read More >

Open RAN test service adds colocation capabilities
Switch operates DC to 20 GHz with 128 configurable connection states for asymmetric SerDes testing
Butler Matrix
Butler Matrix drives Wi-Fi and other phased-array antennas
Long-wire dipole antennas: still viable after more than a century

Featured Contributions

  • Overcome Open RAN test and certification challenges
  • Wireless engineers need AI to build networks
  • Why AI chips need PCIe 7.0 IP interconnects
  • circuit board timing How timing and synchronization improve 5G spectrum efficiency
  • Wi-Fi 7 and 5G for FWA need testing
More Featured Contributions

EE TECH TOOLBOX

“ee
Tech Toolbox: 5G Technology
This Tech Toolbox covers the basics of 5G technology plus a story about how engineers designed and built a prototype DSL router mostly from old cellphone parts. Download this first 5G/wired/wireless communications Tech Toolbox to learn more!

EE LEARNING CENTER

EE Learning Center
“5g
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest info on technologies, tools and strategies for EE professionals.

Engineering Training Days

engineering
“bills
5G Technology World
  • Enews Signup
  • EE World Online
  • DesignFast
  • EDABoard Forums
  • Electro-Tech-Online Forums
  • Microcontroller Tips
  • Analogic Tips
  • Connector Tips
  • Engineer’s Garage
  • EV Engineering
  • Power Electronic Tips
  • Sensor Tips
  • Test and Measurement Tips
  • About Us
  • Contact Us
  • Advertise

Copyright © 2025 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy

Search 5G Technology World