Today’s Image of the Day from the European Space Agency features the galaxy I Zwicky 18, which was captured in remarkable detail by the James Webb Space Telescope...

#imageoftheday #EuropeanSpaceAgency #dwarfgalaxy #jameswebbspacetelescope #photography #universe #space
https://www.earth.com/image/dwarf-galaxy-i-zwicky-18-has-a-youthful-appearance/

HSTPROMO Internal Proper-motion Kinematics of Dwarf Spheroidal Galaxies -- Velocity Anisotropy and Dark Matter Cusp Slope of Draco: https://stsci-opo.org/STScI-01J2BRRT9Z42NDP51VREGDM4B3.pdf -> NASA's Hubble Traces Dark Matter in #DwarfGalaxy Using Stellar Motions: https://hubblesite.org/contents/news-releases/2024/news-2024-017 and https://science.nasa.gov/missions/hubble/nasas-hubble-traces-dark-matter-in-dwarf-galaxy-using-stellar-motions/

PEARLS: A Potentially Isolated Quiescent #DwarfGalaxy with a Tip of the Red Giant Branch Distance of 30 Mpc: https://iopscience.iop.org/article/10.3847/2041-8213/ad1b56 -> JWST Image Contains Photo Bombing Galaxy That Should Not Exist: https://www.sciencealert.com/jwst-image-contains-photo-bombing-galaxy-that-should-not-exist

The #HRMOS Science White Paper is out:

https://arxiv.org/abs/2312.08270

The High-Resolution Multi-Object Spectrograph (HRMOS) is a new facility instrument that will be proposed for the #VLT of #ESO

HRMOS will have high spectral resolution (R = 60000 - 80000), multi-object (20-100) capability, and excellent radial velocity stability (10m/s).

Milky Way will probably devour all the tiny #galaxies that surround it
Based on data from #ESA's Gaia mission, it was found that many dwarf galaxies that were orbiting #MilkyWay only a few BYA have ended up destroyed after being pulled in by our much more massive galaxy. It is possible #darkmatter has something to do with this. By identifying galactic remnants, they determined that most #dwarfgalaxy remnants within the Milky Way only entered it within the last 3B yr or so
https://arstechnica.com/science/2023/12/the-milky-way-will-probably-devour-all-the-tiny-galaxies-that-surround-it/

Sculptor Dwarf Galaxy [Update] https://photo.m-j-s.net/blog/2023/10/sculptor-dwarf-galaxy/

Sculptor Dwarf Galaxy https://photo.m-j-s.net/blog/2023/10/sculptor-dwarf-galaxy/

A Dwarf Galaxy Debris Stream Associated with Palomar 1 and the Anticenter Stream: https://iopscience.iop.org/article/10.3847/2041-8213/acbb5c -> Chinese Researchers Detect a New #StellarStream from #DwarfGalaxy Using #Gaia DR3: https://english.cas.cn/research/highlight/astronomy/202303/t20230321_328546.shtml

#astronomy #DwarfGalaxy #Peekaboo

An article accepted for publication in the journal "Monthly Notices of the Royal Astronomical Society" reports a study of a dwarf galaxy cataloged as HIPASS J1131–31 that is relatively close but has the characteristics of a primordial galaxy. They nicknamed it Peekaboo because it peeks out from behind a bright star that hid it for a long time and made it difficult to identify.

https://english.tachyonbeam.com/2022/12/07/the-tiny-peekaboo-galaxy-looks-like-a-primordial-galaxy/

Peekaboo - the extremely metal poor #dwarfgalaxy HIPASS J1131–31: https://stsci-opo.org/STScI-01GK4VBBZ1QAG4DF1X5QCCH0C8.pdf -> https://hubblesite.org/contents/news-releases/2022/news-2022-051