The center of our galaxy has the raw materials to build stars—but it’s strangely silent. Why are stellar nurseries there underperforming? #GalacticCenter #StarFormation #SETI
https://geekoo.news/struggling-stars-why-the-milky-ways-center-isnt-bursting-with-life/
It’s not how much gas a galaxy has—but where it is—that determines if it will give birth to stars. New cosmic insight from a massive radio survey. #StarFormation #Galaxies #RadioAstronomy
https://geekoo.news/gas-location-not-quantity-determines-star-formation-in-galaxies/
Hubble’s stunning image of dwarf galaxy UGC 5829 reveals wispy pink clouds of star formation against a backdrop of older yellow stars. Located in Leo Minor, this active galaxy is creating new stars, akin to cosmic cotton candy.
#Astronomy #HubbleSpaceTelescope #GoodNews #SpacePhotography #StarFormation
https://scitechdaily.com/cotton-candy-clouds-hubble-captures-a-dwarf-galaxy-in-stunning-detail/
🔭🌌 Using new observations with the ALMA telescope in Chile, an international research team has compiled the most precise map of three regions in the central molecular zone of the Milky Way to date, providing valuable information about star formation in this region. Astrophysicists from the University of Cologne were involved.
Read more: ➡️ https://uni.koeln/8MMQJ
UniCologne #Astrophysics #MilkyWay #Starformation
The hidden patterns of cosmic #turbulence were unveiled in a groundbreaking study mapping the magnetic disorder of the Interstellar Medium (ISM), now published @NatureAstronomy. The international team of researchers, including Ralf Klessen https://klessen.org @zah_unihd, explicitly observed that magnetic fields alter the way energy cascades through the ISM, which offers new key insights into the formation of stars. See https://zah.uni-heidelberg.de/news/detail/hidden-patterns-of-cosmic-turbulence-unveiled #astrophysics #Heidelberg #starformation
Giant Glowing Structure Near Solar System Stuns Astronomers
A giant glowing object has been discovered near the Solar System, and its mysterious nature could change everything we know about space.
Eos may be one of the closest molecular clouds to the Solar System, but it is also one of the largest and most active. As such, it offers a rare opportunity to study star formation in a detailed and precise way. The cloud’s proximity means that scientists can observe the molecular hydrogen in great detail, potentially unlocking secrets about how stars are born, and how planets form in the surrounding material.
#universe #starformation #Eos #molecularcloud
https://dailygalaxy.com/2025/04/giant-glowing-structure-near-solar-system/
An international collaboration called exoALMA is using our telescopes to s peer through the dusty disks where planets are born. Thanks to their newly developed advanced imaging techniques, exoALMA has revealed the most sharp images of young solar systems, as never seen before. This research project has just published 17 papers, with several more coming on the several months.
The exoALMA collaboration is using ALMA to conduct a comprehensive planet hunting campaign in the sub-mm regime. They claim to be the first to focus on still-forming planets, instead of fully formed ones.
Unlike traditional planet-hunting methods that look for a young planet's direct light, exoALMA looks for the effects planets have on their surroundings. This approach potentially allows to detect much younger planets than ever before. "It's like trying to spot a fish by looking for ripples in a pond, rather than [the] fish itself.”
More information on the link below:
#ALMA #AtacamaLargeMillimeterSubmillimeterArray #AtacamaLargeMillimeterArray #exoALMA #ExoPlanets #YoungStars #StarFormation #PlanetFormation #YoungPlanets
Massive Star formation G339.88-1.26 - NASA/ESA JWST Space Telescope 🪐
#astronomy #esa #jwst #nasa #space #starformation
▶️ 1 new picture from @andrealuck https://commons.wikimedia.org/wiki/File:Massive_Star_formation_G339_88-1_26_-_NASA-ESA_JWST_Space_Telescope_%2854461687302%29.jpg
#StarFormation in the #Pacman #Nebula
#Astronomy #Picture of the Day
New JWST image just dropped.
This object is called Herbig-Haro 49/50. It's the outflow of a still-forming star hidden from view to the lower right of the orangish cone of material oriented diagonally in this image.
As stars form they eject excess matter in the direction of their poles of rotation. That material encounters the interstellar medium in the vicinity and lights up in response. "Like the wake of a speeding boat, the bow shocks in this image have an arc-like appearance as the fast-moving jet from the young star slams into the surrounding dust and gas."
Purely by coincidence, the outflow lines up with a distant background galaxy, which is the circular pinkish/blue object at upper left.
More info about the image: https://science.nasa.gov/missions/webb/nasas-webb-telescope-unmasks-true-nature-of-the-cosmic-tornado/
#Astronomy #Stars #StarFormation #Astrophysics #JWST #SpaceTelescope
Galaxy clusters are the largest structures in the universe. Protoclusters like SPT2349-56 offer a unique window into this process, allowing astronomers to observe galaxies as they come together in a dense environment.
By comparing ALMA's high-resolution configuration observations with lower-resolution data from ALMA's Compact Array (ACA), and APEX, the team found a significant amount of molecular gas "invisible" in the higher-resolution ALMA images. The ACA detected 75% more CO than the sum of individual sources detected in higher-resolution ALMA data.
This missing gas isn't just a few faint, undetected galaxies. Instead, it appears to be a diffuse reservoir of gas spread throughout the protocluster.
This hidden gas reservoir could be the key to understanding the intense star formation activity observed in SPT2349-56. The presence of so much extra gas extends the star formation fuel, meaning the overall depletion timescale will exceed 400 million years.
SPT2349-56 is an extreme system, producing stars 10.000 times faster than our Milky Way, and these observations have pushed scientists' understanding of galaxy formation and evolution. No simulation or galaxy formation model had previously predicted this overdensity of gas. These findings also suggest that high-resolution ALMA observations, while excellent for studying individual galaxies, may miss a significant gas component in these early clusters. The missing gas may reside in the circum-galactic medium (CGM) or the pre-heated proto-intracluster medium (proto-ICM).
More information at https://www.almaobservatory.org/en/press-releases/alma-founds-hidden-cosmic-fuel/
#ALMA #AtacamaLargeMillimeterSubmillimeterArray #GalaxyClusters #StarFormation
“If you find yourself outside on a dark, clear night, with the haze of our Milky Way galaxy arcing overhead, see if you can pick out the dark, starless patches where dust and gas might gather. In this galaxy and beyond, stars and planets are forming, and the cycle of dust continues.”
Join Meghan Feldman as she illustrates how deeply dust and the cosmos are intertwined: https://www.thesciencewriter.org/small-things-stories/cosmic-cycle-of-dust
#Astronomy #SpaceDust #ScienceWriting #SmallThingsTSW #StarFormation #Space #Planets #MilkyWay #Stars
🌠🔬 "Rezepte" der Sternentstehung 🌠
Ein internationales Forschungsteam hat Daten von über 1.000 Sternentstehungsgebieten ausgewertet, um den Ursprung und die Entstehung neuer Sterne besser zu verstehen. 🌌
Mehr dazu ➡️ https://uni.koeln/5VBTL
#Uniklöln #unicologne #Sternentstehung #Astrophysik #StarFormation #Astrophysics #stars #sterne #forschung #research
🌠🔬 The "recipes" of star formation 🌠
An international research team has analyzed data from over 1,000 star-forming regions to better understand the origin and formation of new stars. 🌌
Read more ➡️ https://uni.koeln/U6JJZ
#Uniklöln #unicologne #Sternentstehung #Astrophysik #StarFormation #Astrophysics #stars #sterne #forschung #research
#Andromeda's Dwarf #Galaxies Reveal Unique #StarFormation Histories
Weekly Update from the Open Journal of Astrophysics – 18/01/2025
It’s Saturday morning so once again it’s time for an updated of papers published at the Open Journal of Astrophysics. Since the last update we have published three new papers which brings the number in Volume 8 (2025) up to 7 and the total so far published by OJAp up to 242.
In chronological order of publication, the four papers published this week, with their overlays, are as follows. You can click on the images of the overlays to make them larger should you wish to do so.
First one up is “Potential-density pairs for Galaxy discs with exponential or sech^2 vertical profile” by Walter Dehnen and Shera Jafaritabar (Heidelberg, Germany). This paper was published on Tuesday 14th January 2025 in the folder marked Astrophysics of Galaxies. It presents a new set of analytic models for the structure of disc galaxies. The overlay, which includes the abstract, is here:
You can find the officially accepted version of this paper on arXiv here.
The second paper, which was published on Thursday 17th January 2025 also in the folder Astrophysics of Galaxies, is “Quantifying Bursty Star Formation in Dwarf Galaxies” by Yuan-Sen Ting (Ohio State University) and Alexander Ji (U. Chicago). This paper describes an application of Gaussian mixture models to distinguish between discontinuous and continuous star formation histories in dwarf galaxies.
Here is a screen grab of the overlay, which includes the abstract:You can find the officially accepted version of the paper on the arXiv here.
The third paper to announce, also published on 17th January 2025 but in the folder Cosmology and NonGalactic Astrophysics, is “Fast Projected Bispectra: the filter-square approach” by Lea Harscouet, Jessica A. Cowel, Julia Ereza & David Alonso (Oxford U., UK), Hugo Camacho (Brookhaven National Laboratory, USA), Andrina Nicola (Bonn, Germany) and Anže Slosar (Brookhaven). This paper presents Presenting the filtered-squared bispectrum (FSB), a fast and robust estimator of the projected bispectrum for use on cosmological data sets.
You can see the overlay here:
The accepted version of this paper can be found on the arXiv here.
That’s all for this week. I’ll do another update next Saturday.
#arXiv240806807v2 #arXiv240907980v2 #arXiv250105916v1 #bispectrum #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #discGalaxies #dwarfGalaxies #galacticStructure #starFormation #TheOpenJournalOfAstrophysics
Weekly Update from the Open Journal of Astrophysics – 11/01/2025
Welcome to the first update of 2025 from the Open Journal of Astrophysics. For the new year we have started Volume 8. Since the last update of 2024 we have published four new papers which brings the total so far published by OJAp up to 239.
In chronological order of publication, the four papers published this week, with their overlays, are as follows. You can click on the images of the overlays to make them larger should you wish to do so.
First one up is “Weak-Lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: I. Cluster Catalog, Selection Function and Mass–Observable Relation” by Kai-Feng Chen (MIT, USA), I-Non Chiu (National Cheng University, Taiwan), Masamune Oguri (Chiba University, Japan), Yen-Ting Lin (IAAAS, Taiwan), Hironao Miyatake (Nagoya, Japan), Satoshi Miyazaki (Nat. Astr. Obs. Japan), Surhud More (IUCAA, India), Takashi Hamana (Nat. Astr. Obs. Japan), Markus M. Rau Carnegie Mellon University, USA), Tomomi Sunayama (Steward Obs., USA), Sunao Sugiyama (U. Penn, USA), Masahiro Takada (U. Tokyo, Japan).
This paper, which was published on Monday 6th January 2025 is in the folder Cosmology and NonGalactic Astrophysics, discusses steps towards towards the extraction of cosmogical constraints from a sample of galaxy clusters selected via weak gravitational lensing
Here is a screen grab of the overlay, which includes the abstract:
You can find the officially accepted version of the paper on the arXiv here.
The second paper to announce, published on 7th January 2025 and also in the folder Cosmology and NonGalactic Astrophysics, is “Cosmology on point: modelling spectroscopic tracer one-point statistics” by Beth McCarthy Gould (Newcastle U., UK), Lina Castiblanco (Bielefeld, Germany), Cora Uhlemann (Bielefeld, Germany), and Oliver Friedrich (LMU, Germany).
The accepted version of this paper can be found on the arXiv here.
The third paper, published on 9th January 2025, also in the folder Cosmology and NonGalactic Astrophysics, is “Probing Environmental Dependence of High-Redshift Galaxy Properties with the Marked Correlation Function” by Emy Mons and Charles Jose (Cochin University of Science and Technology, India). This paper uses the marked two-point correlation function to measure the environmental dependence of galaxy clustering at high redshift.
Here is the overlay:
The final version accepted on arXiv is here.
Last of this quartet, also published on 9th January 2025, but in the folder Astrophysics of Galaxies is “The infrared luminosity of retired and post-starburst galaxies: A cautionary tale for star formation rate measurements” by Vivienne Wild (St Andrews, UK), Natalia Vale Asari (Universidade Federal de Santa Catarina, Brazil), Kate Rowlands (STScI, Sara L. Ellison (U. Victoria, Canada), Ho-Hin Leung (St Andrews), Christy Tremonti (U. Wisconsin-Madison, USA).
The paper proposes an extension of the semi-analytic formalism to weak lensing and thermal Sunyaev-Zeldovich (tSZ) fields directly on the full-sky, with an emphasis on higher-order correlations. The overlay is here:
You can find the official accepted version on the arXiv here.
That’s all for this week. I’ll do another update next Saturday.
#240907980v2 #arXiv240806807v2 #arXiv250105916v1 #AstrophysicsOfGalaxies #bispectrum #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #discGalaxies #dwarfGalaxies #galacticStructure #onePointStatistics #starFormation #TheOpenJournalOfAstrophysics
