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#redshift

1 post1 participant0 posts today
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Louis Marmet 🇨🇦

#Cosmology #JWST
"Puzzling observation by JWST: Galaxies in the deep universe rotate in the same direction"

🔗phys.org/news/2025-03-puzzling

<<If the physics of galaxy rotation affects the light that galaxies emit in a manner that is currently unknown, that can also affect the redshift, and therefore can be related to #Alternative #Redshift models.>> - from the paper in MNRAS

Phys.org · Puzzling observation by JWST: Galaxies in the deep universe rotate in the same directionBy Kansas State University
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IRAP

[#SonEtLumière cosmologique ✨ 🎧 ] Grâce au sondage #HUDF effectué par le télescope spatial #Hubble en 2003-2004, notre ciel profond est apparu constellé de milliers de #galaxies lointaines et peu lumineuses. L'une des images obtenues a été sonifiée, de sorte que la fréquence de l'onde sonore associée à chaque galaxie témoigne de son #redshift, ou décalage vers le rouge : apod.nasa.gov/apod/ap250302.ht

Parviendrez-vous à découvrir la galaxie la plus éloignée de l'image - celle dont la fréquence sonore associée est la plus basse ?

The Hubble Ultra Deep Field in Light and Sound Image Credit: NASA, ESA, Hubble
#cosmology#HubbleUltraDeepField
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khushnuma

In the world of data science, raw data serves as the foundation for generating actionable insights. However, managing, processing, and transforming this data into a usable format requires specialized tools.

#ApacheSpark #ApacheHadoop #Kafka #Airflow #DBT #Presto #SQL #Python #PySpark #Snowflake #Redshift #BigQuery #Kubernetes #Docker #Terraform #Databricks

read more: reshukhushi.wordpress.com/2024

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Daniel Fischer

A Glimpse at the New #Redshift Frontier Through Abell S1063: arxiv.org/abs/2411.13640 -> "We report the discovery of five galaxy candidates at redshifts between 15.9<z<18.6 in JWST observations from the GLIMPSE survey. These robust sources were identified using a combination of Lyman-break selection and photometric redshift estimates."

arXiv logo
arXiv.orgA Glimpse at the New Redshift Frontier Through Abell S1063We report the discovery of five galaxy candidates at redshifts between $15.9<z<18.6$ in JWST observations from the GLIMPSE survey. These robust sources were identified using a combination of Lyman-break selection and photometric redshift estimates. The ultra-deep NIRCam imaging from GLIMPSE, combined with the strong gravitational lensing of the Abell S1063 galaxy cluster, allows us to probe an intrinsically fainter population (down to $M_{\rm UV}=-17.5$ mag) than previously achievable. These galaxies have absolute magnitudes ranging from $M_{\rm UV}= -17.7$ to $-18.0$ mag, with UV continuum slopes between $β\simeq -2.3$ and $β\simeq -3.0$, consistent with young, dust-free stellar populations. The number density of these objects, log$_{\rm 10}$ ($ϕ$/[Mpc$^{-3}$ mag$^{-1}$])=$-3.43^{+0.28}_{-0.64}$ at $M_{\rm UV}=-18$ is in clear tension with pre-JWST theoretical predictions, extending the over-abundance of galaxies from $z\sim10$ to $z\sim 18.6$. These results, together with the scarcity of brighter galaxies in other public surveys, suggest a steep decline in the bright-end of the UV luminosity function at $z \sim 17$, implying efficient star formation and possibly a close connection to the halo mass function at these redshifts. Testing a variety of star formation histories suggests that these sources are plausible progenitors of the unusually UV-bright galaxies that JWST now routinely uncovers at $z = 10-14$. Overall, our results indicate that the luminosity distribution of the earliest star-forming galaxies could be shifting towards fainter luminosities, implying that future surveys of cosmic dawn will need to explore this faint luminosity regime.
Public
OMG! Ubuntu!

Linux Mint Adding Native ‘Night Light’ Feature to Cinnamon

Linux Mint has revealed it’s brining a native ‘night light’ mode to the Cinnamon desktop. Earlier versions of Linux Mint included a third-party app called Redshift to provide similar functionality. However, when then Mozilla location service was shut down earlier this year, the geo-location capabilities powering Redshift (which made the feature kick-in at sunset for the users location) no longer worked – although the app itself still did. But Linux Mint’s developers felt that asking users to work around the breakage by punching in their location’s longitude and latitude coordinates manually was a tough ask, especially for a distro focused :sys_more_orange:
#News #Cinnamon #LinuxMint #NightLight #Redshift

:sys_omgubuntu: omgubuntu.co.uk/2024/11/linux-

Media source: https://i0.wp.com/www.omgubuntu.co.uk/wp-content/uploads/2023/07/linuxmint-logo.png?resize=406,232&ssl=1
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gianarb

Recently during an interview the question was about how to improve query execution and how to avoid a single query to crash an entire node.

Half into it they told me that they can't spend 10 years building their databases and the solution I got was not that complete or smart. Reasonable but then you get to this paper 📜

Luckily

muratbuffalo.blogspot.com/2024

muratbuffalo.blogspot.comAuto-WLM: machine learning enhanced workload management in Amazon RedshiftThis paper appeared in Sigmod'23. What? Auto-WLM is a machine learning based *automatic workload manager* currently used in production in Am...
#databasedesign#dev#redshift
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