Mastodawn

Hubble Captures Galaxy Cluster

https://fed.brid.gy/r/https://science.nasa.gov/missions/hubble/hubble-captures-galaxy-cluster/

New in the #VirtualObservatory: “DESI observations of the Andromeda galaxy” by Dey A. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/1
#Metallicity #BroadBandPhotometry #InfraredPhotometry #Galaxies

VizieR J/ApJ/944/1

VizieR catalogues

Vibewire Magazine 1d ago

Hubble Captures Galaxy Cluster http://dlvr.it/TSgR7x #Astrophysics #AstrophysicsDivision #Galaxies

Jim Carey 2d ago

Hubble Sights Galaxy in Transition https://www.nasa.gov/image-detail/hubble-ngc1266-2-4f-flat-final-crop2-2/?utm_source=dlvr.it&utm_medium=mastodon #Hubble #NASA #Space #Astronomy #Galaxies

3i/Atlas 2d ago

Webb Discovers One of the Universe's First Galaxies
https://atlas.whatip.xyz/post.php?slug=webb-discovers-one-of-the-universes-first-galaxies
<p>Astronomers using the James Webb Space Telescope have identified an ultra-faint galaxy seen just 800
#astronomers #discovers #universe #galaxies

Webb Discovers One of the Universe's First Galaxies

Astronomers using the James Webb Space Telescope have identified an ultra-faint galaxy seen just 800 million years after the Big Bang. The galaxy contains almost no heavy elements, shows signs of inte...

Daniel Pomarède 2d ago

Cosmography alert 🚨

Peculiar velocities at low Galactic latitude

by Jeremy Mould and co-authors

https://arxiv.org/abs/2605.19236

#Cosmology #Laniakea #galaxies #LaniakeaSupercluster #GreatAttractor #MeerKAT #WALLABY #radiotelescope #Quipu #QuipuSupercluster #Cosmicflows #Cosmography #Astronomy #Astrophysics #Astrodon #science #news

Peculiar velocities at low Galactic latitude

The Laniakea Supercluster is the closest large scale structure of galaxies. Is such a structure expected in the standard cold dark matter model of cosmology? This would be a relatively simple question to answer, were it not for the fact that the Zone of Avoidance (ZOA) runs right through it. Recent improvements to this paucity of data in the innermost ZOA can be made from systematic 21 cm surveys using the MeerKAT telescope (e.g. Kraan-Korteweg et al. 2024), and implementing these HI-redshifts as an extension to the CosmicFlows4 database for reconstruction (Hollinger et al. 2026). In this paper we test the assumption that for the purpose of reconstruction, additional HI detected galaxies without peculiar velocity determinations could be placed at their Hubble distances. We present infrared photometry of 163 of these in HI detected MeerKAT ZOA galaxies, in addition to 2MASS Extended Sources in the ZOA to determine their peculiar velocities. Averaging these peculiar velocities into redshift bins, we find that peculiar velocity corrections in the Laniakea Supercluster ZoA region are not prohibitively large, and that one can proceed with its reconstruction using the copious redshift data now available.

arXiv.org

JD Gadina 2d ago

M104 - The Sombrero Galaxy.
Celestron NexStar Evolution 6 + ZWOASI533MC Pro.
1220mm, f8, 480 exposures of 60’’.
#telescope #telescopes #celestron #celestrontelescope #celestronnexstar #nexstarevolution #nexstarevolution6 #zwo #zwoasi #zwoasi533mc #astro #astrophoto #astrophotos #astrophotography #astrophotographer #spacephotography #astronomy #spaceexploration #nasa #universe #space #deepsky #deepspace #galaxy #galaxies #sombrero #sombrerogalaxy #m104 #messier104 #messier

JD Gadina 🦄2d ago

Daniel Fischer 3d ago

The Growth of Dust in #Galaxies in the First Billion Years with Applications to Blue Monsters: https://arxiv.org/abs/2509.18266 -> Where Did All This Dust Come From? https://astrobites.org/2026/05/20/high-z-dust-accretion/

The Growth of Dust in Galaxies in the First Billion Years with Applications to Blue Monsters

A combination of JWST observations at z~12-14 and ALMA observations of extremely dust-rich systems at z~6 has demonstrated that dust grows extremely fast in the early Universe, with galaxies amassing up to 10^7 Msun of dust in just 500 Myr between z=12->6. In this paper we demonstrate, via a series of numerical experiments conducted in cosmological zoom-in simulations, that a likely pathway for this dust accumulation in the first formed galaxies is through production at early times via supernovae, followed by the rapid growth on ultrasmall dust grains. Our main results follow. The stellar production of dust dominates until z ~ 10-11 at which point galaxies transition to a growth-dominated regime. We employ a Shapley analysis to demonstrate that the local density is the dominant factor driving dust growth, followed by the grain size distribution. A rapid rise in the small-to-large grain ratio with decreasing redshift (owing to grain-grain shattering) drives growth through increased dust surface area per unit mass. Growth models are necessary to match the dust content of ALMA detected sources at z ~ 6. Finally, we demonstrate that ``blue monsters'', massive, UV-bright galaxies at $z>10$ with extremely blue continuum slopes likely have dust-to stellar mass ratios 10^-4-10^-3, but their top-heavy grain size distributions render them optically thin in the UV, providing a natural explanation for their observed properties without requiring exotic dust geometries.

arXiv.org

Space.com: NASA, Space Exploration and Astronomy News [Unofficial]3d ago

The universe's 'most relaxed' galaxy cluster was shaped by cosmic violence, new study finds

https://fed.brid.gy/r/https://www.space.com/astronomy/galaxies/the-universes-most-relaxed-galaxy-cluster-was-shaped-by-cosmic-violence-new-study-finds