Circular Astronomy

Tag: ALMA

  • High-Redshift Cosmology in the JWST Era: ΛCDM Tension, Early Massive Galaxies, and the 21 cm Frontier

    Abstract: Tracing the Universe’s Origins High-redshift cosmology (z≳6), spanning the Cosmic Dawn and the Epoch of Reionization (EoR), currently stands as the central frontier of astrophysics. This review synthesizes recent findings, particularly those enabled by the James Webb Space Telescope (JWST), against the backdrop of the standard ΛCDM cosmological model. JWST has fundamentally altered the…

  • Protoplanetary Disc Oph163131 – Surface Layers Lack Grains Larger than 1 µm

    JWST imaging of edge-on protoplanetary disks. III. Drastic morphological transformation across the mid-infrared in Oph163131. Marion Villenave et. al. https://t.co/aMCnahCjLs pic.twitter.com/NZDlPOVrjK — AstroArxiv (@AstroArxiv) October 2, 2024 https://platform.twitter.com/widgets.js “The lack of sharp-edged structures in the extended patchy emission argues against the presence of shocks and suggests photoexcitation or stochastic heating of material smoothly flowing away…

  • Dimethyl Ether Detected in MWC 480 Protoplanetary Disk

    Dimethy Ether was first synthesised in 1835. It is expected to be used in biofuels in the future. The MWC 480 protoplanetary disk is a subject of significant interest due to its complex structure and potential insights into planet formation processes. Star Characteristics Protoplanetary Disk Features Kinematic and Chemical Properties Overall, the MWC 480 protoplanetary disk…

  • Protoplanetary Disk Instability Around AB Aurigae (AB Aur)

    Overview AB Aurigae, commonly referred to as AB Aur, is a young star located in the constellation Auriga. It is a Herbig Ae/Be star, which means it is a pre-main-sequence star still in the process of formation. It has a stellar classification of A0Ve, matching an A-type main-sequence star with emission lines in the spectrum.…

  • HL Tau Protoplanetary Disk Contains More Water Than Earth

    The observations show that there is at least three times more water in the inner disc of the young Sun-like star HL Tauri than in all of Earth’s oceans combined. HL Tau also called HL Tauri is a young T Tauri star located approximately 450 light-years away from earth in the Taurus Molecular Cloud. It…