* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Wednesday, July 9, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Moses Singer Welcomes Entertainment and Intellectual Property Partner Frederick Bimbler – Yahoo Finance

    Moses Singer Expands Team with New Entertainment and Intellectual Property Partner Frederick Bimbler

    Longhua District and Max-Matching Entertainments, supported by RWS Global forge strategic partnership to develop international IP-themed entertainment complex – Amusement Today

    Longhua District and Max-Matching Entertainments, supported by RWS Global forge strategic partnership to develop international IP-themed entertainment complex – Amusement Today

    Government whip to withdraw Entertainment Complex Bill on July 9 – Nation Thailand

    Government whip to withdraw Entertainment Complex Bill on July 9 – Nation Thailand

    Magicians and Battlebots light up Las Vegas entertainment scene – KSNV

    Magicians and Battlebots Take Las Vegas Entertainment by Storm

    Max-Matching Entertainments & Longhua District form partnership for new entertainment complex – Blooloop

    Max-Matching Entertainments and Longhua District Unite to Launch Thrilling New Entertainment Complex

    Kennedy Publishing, MGA Entertainment Launch Yummiland Magazine – License Global

    Kennedy Publishing, MGA Entertainment Launch Yummiland Magazine – License Global

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Kaseya Extends Community Investment with Addition of Technology Marketing Toolkit – Kaseya

    Kaseya Extends Community Investment with Addition of Technology Marketing Toolkit – Kaseya

    AI and the Trust Revolution: How Technology Is Transforming Human Connections – Foreign Affairs

    AI and the Trust Revolution: How Technology Is Transforming Human Connections – Foreign Affairs

    Technology And Construction Names Join Top Stock Lists: Check Out Additions To IBD 50, Big Cap 20 And More – Investor’s Business Daily

    Technology and Construction Leaders Surge Into Top Stock Rankings: See the Latest Additions to IBD 50, Big Cap 20, and More

    Column: Teach kupuna new technology skills – Honolulu Star-Advertiser

    Empowering Kupuna: Unlocking New Technology Skills for a Connected Future

    EIFO invests $5 million in D3, the Ukraine-focused defence technology venture fund – sUAS News

    EIFO Pledges $5 Million to Supercharge Ukraine-Focused Defense Technology Fund

    New Technology for Water Efficiency and Working with Mexico on Screwworm – AG INFORMATION NETWORK OF THE WEST

    Revolutionary Water Efficiency Technology and Cross-Border Collaboration to Defeat Screwworm

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Moses Singer Welcomes Entertainment and Intellectual Property Partner Frederick Bimbler – Yahoo Finance

    Moses Singer Expands Team with New Entertainment and Intellectual Property Partner Frederick Bimbler

    Longhua District and Max-Matching Entertainments, supported by RWS Global forge strategic partnership to develop international IP-themed entertainment complex – Amusement Today

    Longhua District and Max-Matching Entertainments, supported by RWS Global forge strategic partnership to develop international IP-themed entertainment complex – Amusement Today

    Government whip to withdraw Entertainment Complex Bill on July 9 – Nation Thailand

    Government whip to withdraw Entertainment Complex Bill on July 9 – Nation Thailand

    Magicians and Battlebots light up Las Vegas entertainment scene – KSNV

    Magicians and Battlebots Take Las Vegas Entertainment by Storm

    Max-Matching Entertainments & Longhua District form partnership for new entertainment complex – Blooloop

    Max-Matching Entertainments and Longhua District Unite to Launch Thrilling New Entertainment Complex

    Kennedy Publishing, MGA Entertainment Launch Yummiland Magazine – License Global

    Kennedy Publishing, MGA Entertainment Launch Yummiland Magazine – License Global

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Kaseya Extends Community Investment with Addition of Technology Marketing Toolkit – Kaseya

    Kaseya Extends Community Investment with Addition of Technology Marketing Toolkit – Kaseya

    AI and the Trust Revolution: How Technology Is Transforming Human Connections – Foreign Affairs

    AI and the Trust Revolution: How Technology Is Transforming Human Connections – Foreign Affairs

    Technology And Construction Names Join Top Stock Lists: Check Out Additions To IBD 50, Big Cap 20 And More – Investor’s Business Daily

    Technology and Construction Leaders Surge Into Top Stock Rankings: See the Latest Additions to IBD 50, Big Cap 20, and More

    Column: Teach kupuna new technology skills – Honolulu Star-Advertiser

    Empowering Kupuna: Unlocking New Technology Skills for a Connected Future

    EIFO invests $5 million in D3, the Ukraine-focused defence technology venture fund – sUAS News

    EIFO Pledges $5 Million to Supercharge Ukraine-Focused Defense Technology Fund

    New Technology for Water Efficiency and Working with Mexico on Screwworm – AG INFORMATION NETWORK OF THE WEST

    Revolutionary Water Efficiency Technology and Cross-Border Collaboration to Defeat Screwworm

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Redshift Riddles: Decoding Distance With Space Telescopes

December 29, 2023
in Science
Redshift Riddles: Decoding Distance With Space Telescopes
Share on FacebookShare on Twitter

Astrophysics Galactic Measurement Art Concept

The James Webb Space Telescope is revolutionizing our understanding of galaxy evolution in the early universe through redshift analysis and advanced imaging techniques, leading to significant discoveries and emphasizing the need for precise spectroscopic data. Credit: SciTechDaily.com

Using redshift and photometry, NASA’s James Webb Space Telescope is uncovering the secrets of early galaxies, demonstrating the need for precise spectral data in understanding the universe’s history.

One of NASA’s James Webb Space Telescope’s science goals is to understand how galaxies in the early universe formed and evolved into much larger galaxies like our own Milky Way. This goal requires that we identify samples of galaxies at different moments in the universe’s history to explore how their properties evolve with time.

We asked Micaela Bagley, a postdoctoral fellow at the University of Texas at Austin, to explain how astronomers analyze light from distant galaxies and determine “when in the universe’s history” we are observing them.

“Light takes time to travel through space. When light from a distant galaxy (or any object in space) reaches us, we are seeing that galaxy as it appeared in the past. To determine the  ‘when’ in the past, we use the galaxy’s redshift.

“Redshift tells us how long the light has spent being stretched to longer wavelengths by the expansion of the universe as it travels to reach us. We can calculate the redshift using features in the galaxy’s spectrum, which is an observation that spreads out the light from a target by wavelength, essentially sampling the light at very small intervals. We can measure the emission lines and spectral breaks (abrupt changes in the light intensity at specific wavelengths), and compare their observed wavelengths with their known emitted wavelengths.

“One of the most efficient ways to identify galaxies is through imaging, for example with the observatory’s NIRCam (Near-Infrared Camera) instrument. We take images using multiple filters to collect the object’s light in several different colors. When we measure a galaxy’s photometry, or how bright it is in an image, we’re measuring the brightness of the object averaged across the full range of wavelengths transmitted by the filter. We can observe a galaxy with NIRCam’s broadband imaging filters, but there is a lot of detailed information hidden within each single measurement for every 0.3–1.0 microns in wavelength coverage.

“Yet we can start to constrain the shape of a galaxy’s spectrum. The spectrum’s shape is affected by several properties including how many stars are forming in the galaxy, how much dust is present within it, and how much the galaxy’s light has been redshifted. We compare the measured brightness of the galaxy in each filter to the predicted brightness for a set of galaxy models spanning a range of those properties at a range of redshifts. Based on how well the models fit the data, we can determine the probability that the galaxy is at a given redshift or ‘ moment in history.’ The best-fitting redshift determined through this analysis is called the photometric redshift.

Measuring a Photometric Redshift Using Six Broadband Imaging Filters

An illustration of measuring a photometric redshift using six broadband imaging filters (left panel). A model galaxy spectrum with a strong spectral break and several emission lines is shown in gray. The wavelength at which the light was emitted and observed is listed along the top and bottom, respectively. The light has been redshifted (or stretched out) by a factor of 10. The NIRCam filter transmissions and wavelength coverages are shown by the colored shaded regions. We measure the average flux in each filter (circles) and fit these six data points with different galaxy models at a range of redshifts to determine the probability that the galaxy is at each redshift. The galaxy has a best-fit photometric redshift of 9 (when the universe was 550 million years old), but the probability distribution (right panel) covers the redshift range of 7-11 (when the universe was between 420 to 770 million years old.) Credit: Micaela Bagley

“In July 2022, teams used NIRCam images from the CEERS Survey to identify two galaxies with photometric redshifts greater than 11 (when the universe was less than 420 million years old.) Neither of these objects were detected by NASA’s Hubble Space Telescope observations in this field because they are either too faint or are detectable only at wavelengths outside of Hubble’s sensitivity. These were very exciting discoveries with the new telescope!

Two Galaxies Discovered in Early NIRCam Imaging

Two galaxies discovered in early NIRCam imaging with photometric redshifts of 11.5 and 16.4 (when the universe was about 390 and 240 million years old, respectively). For each galaxy, the teams show image cutouts in all available filters along the top, the observed photometry, the best-fitting galaxy model, and the photometric redshift probability distribution as an inset. Credit: Top panel – Finkelstein et al. (2023) ; Bottom panel – Donnan et al. (2023) .

“However, photometric redshift of a galaxy is somewhat uncertain. For example, we may be able to determine that a spectral break is present in a filter, but not the precise wavelength of the break. While we can estimate a best-fit redshift based on modeling the photometry, the resulting probability distribution is often broad. Additionally, galaxies at different redshifts can have similar colors in broadband filters, making it difficult to distinguish their redshifts based only on photometry. For example, red, dusty galaxies at redshifts less than 5 (or when the universe was 1.1 billion years old or older) and cool stars in our own galaxy can sometimes mimic the same colors of a high-redshift galaxy. We therefore consider all galaxies that are selected based on their photometric redshifts to be high-redshift candidates until we can obtain a more precise redshift.

“We can determine a more precise redshift for a galaxy by obtaining a spectrum. As illustrated in the following figure, our calculation of the redshift probability distribution improves as we measure the photometry of a galaxy in ever finer wavelength steps. The probability distribution narrows as we move from using broadband filters for imaging (top) to a larger number of narrower filters (middle), to a spectrum (bottom). In the bottom row we can start to key off specific features like the spectral break on the far left and emission lines to obtain a redshift probability distribution that is very precise – a spectroscopic redshift.

Redshift Probability Distribution Narrows

An illustration of how the redshift probability distribution (right panels) narrows as we measure the photometry of a galaxy (left panels) in ever finer wavelength steps. Credit: Micaela Bagley

“In February 2023, the CEERS teams followed up their high-redshift candidates with observatory’s NIRSpec (Near-Infrared Spectrograph) instrument to measure precise, spectroscopic redshifts. One candidate (Maisie’s Galaxy) has been confirmed to be at redshift 11.4 (when the universe was 390 million years old), while the second candidate was discovered to actually be at a lower redshift of 4.9 (when the universe was 1.2 billion years old.)

Spectroscopic Observations Webb NIRSpec Instrument Two Galaxy Candidates

Spectroscopic observations with the NIRSpec instrument of the two galaxy candidates at redshifts 11.5 and 16.4. The top row shows Maisie’s Galaxy at left, which is confirmed to be at a redshift of 11.44 (or when the universe was about 390 million years old). This redshift is based on the detection of the spectral break marked by the dotted vertical red line in right figure in the upper row in the NIRSpec spectrum. The bottom row shows the candidate from Donnan et al. (2023), which is found to be at a redshift of 4.9 from strong doubly ionized oxygen ([OIII]) and hydrogen (Hα) emission lines. Credit: Figures 2 and 3 from Arrabal Haro et al. (2023)

“Even cases where we discover that a high-redshift candidate is actually a lower redshift galaxy can be very exciting. They allow us to learn more about conditions in galaxies and the way those conditions affect their photometry, to improve our models of galaxy spectra, and to constrain galaxy evolution across all redshifts. However, they also highlight the need to obtain spectra to confirm high-redshift candidates.

About the Author

Micaela Bagley is a postdoctoral fellow at the University of Texas at Austin and a member of CEERS. They study galaxy formation and evolution in the early universe. Micaela is also responsible for processing all the NIRCam images for the CEERS team.

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/redshift-riddles-decoding-distance-with-space-telescopes/

Tags: RedshiftRiddlesscience
Previous Post

Scientists Uncover Cancer’s “Death Star” – Secret Vulnerabilities Revealed

Next Post

Revolution in Material Science: Scientists Construct Nanoparticle Quasicrystal With DNA

Musk says he is forming new political party after fallout with Trump – CNN

Musk says he is forming new political party after fallout with Trump – CNN

July 9, 2025
Kaseya Extends Community Investment with Addition of Technology Marketing Toolkit – Kaseya

Kaseya Extends Community Investment with Addition of Technology Marketing Toolkit – Kaseya

July 9, 2025
Racketeering charges likely in death of sports reporter Adan Manzano – fox8live.com

Racketeering charges likely in death of sports reporter Adan Manzano – fox8live.com

July 9, 2025
A Research Framework for Water Health Clinical Diagnosis System in China | Newswise – Newswise

Revolutionary Research Framework Transforms Water Health Clinical Diagnosis in China

July 8, 2025
I Spent $88.03 at American Science and Surplus – Milwaukee Magazine

I Spent $88.03 at American Science and Surplus – Milwaukee Magazine

July 8, 2025
Scientists burned, poked and sliced their way through new robotic skin that can ‘feel everything’ – Live Science

Scientists Test Revolutionary Robotic Skin That Can ‘Feel Everything’ Through Burning, Poking, and Slicing

July 8, 2025
Study of Environment, Lifestyle and Fibroids (SELF) – National Institute of Environmental Health Sciences (.gov)

Study of Environment, Lifestyle and Fibroids (SELF) – National Institute of Environmental Health Sciences (.gov)

July 8, 2025
Fluminense vs Chelsea LIVE on DAZN: Semi-final underway in New Jersey – dazn.com

Fluminense vs Chelsea LIVE on DAZN: Semi-final underway in New Jersey – dazn.com

July 8, 2025
Supply chain careers delivering high pay, purpose in a shifting economy – Supply Chain Management Review

Supply chain careers delivering high pay, purpose in a shifting economy – Supply Chain Management Review

July 8, 2025
Moses Singer Welcomes Entertainment and Intellectual Property Partner Frederick Bimbler – Yahoo Finance

Moses Singer Expands Team with New Entertainment and Intellectual Property Partner Frederick Bimbler

July 8, 2025

Categories

Archives

July 2025
MTWTFSS
 123456
78910111213
14151617181920
21222324252627
28293031 
« Jun    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (711)
  • Economy (736)
  • Entertainment (21,624)
  • General (15,785)
  • Health (9,773)
  • Lifestyle (741)
  • News (22,149)
  • People (736)
  • Politics (745)
  • Science (15,953)
  • Sports (21,235)
  • Technology (15,720)
  • World (717)

Recent News

Musk says he is forming new political party after fallout with Trump – CNN

Musk says he is forming new political party after fallout with Trump – CNN

July 9, 2025
Kaseya Extends Community Investment with Addition of Technology Marketing Toolkit – Kaseya

Kaseya Extends Community Investment with Addition of Technology Marketing Toolkit – Kaseya

July 9, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version