Astronomers observed with the Atacama Large Millimeter/submillimeter Array (ALMA) the center of a relatively nearby galaxy known as NGC 253, which produces stars at a very high rate.
Galaxy
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Press Release, SETI & Technosignatures
Webb’s View Of The Galactic Center. 500,000+ Stars. How Many Have Life-bearing Worlds?
The latest image from NASA’s James Webb Space Telescope shows a portion of the dense center of our galaxy in unprecedented detail, including never-before-seen features astronomers have yet to explain. […]
Posted inAI - Data - Apps - Cybernetics, Astronomy & Telescopes, Habitable Zones, Status Report
Dynamical Aspects Of Galactic Habitability In N-body Simulations
Recent studies of Galactic evolution revealed that the dynamics of the stellar component might be one of the key factors when considering galactic habitability.
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Status Report
Effects of Dust Grain Size Distribution on the Abundances of CO and H2 in Galaxy Evolution
We model the effect of grain size distribution in a galaxy on the evolution of CO and H2 abundances. The formation and dissociation of CO and H2 in typical dense […]
![All [C I] emission around 4C 41.17. (A) The blue and cyan [C I] contours are the same as Figure 1A; the green (marked as radio galaxy `RG’) and red (marked as South-East `SE’) contours show additional velocity channels. The background image is the same as Fig. S1A. The [C I] emission is integrated across the velocity ranges indicated in the legend. Blue and red contour levels start at 2σ and increase by 1σ, with σ = 0.011 Jy bm-1 × km s-1. The green contours start at 3σ and increase by 1σ, with σ = 0.015 Jy bm-1 × km s-1. No correction for primary beam (PB) response was applied. The gray contours show the Lyα halo (background image in Fig. 1A). Two red galaxies in the HST imaging at the base of the stream are probably dusty star-forming galaxies (DSFGs) (27), marked with arrows. The dotted gray lines indicate two prominent dark lanes (DL) previously identified in the Lyα imaging (17 ,24). Other symbols and labels are the same as Figure 1. (B-H) Spectra of [C I] extracted at the locations of the white crosses in panel A, which capture regions NW1, NW2, NW3, and NW4 of the stream, as well as the radio galaxy (RG), the region West of the radio galaxy that connects to the stream (W), and the region South-East of the radio galaxy (SE). The spectra are Hanning smoothed to a velocity resolution of 29 km s-1 and values have been corrected for the PB response to give flux densities. The colored shaded regions correspond to the velocity ranges in the legend. -- Science](https://i0.wp.com/astrobiology.com/wp-content/uploads/2023/04/Expansive.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry, Astronomy & Telescopes, Imaging & Spectroscopy, Press Release
Expansive Intergalactic Stream Of Cold Cosmic Carbon Feeding A Massive Galaxy
Radio telescope observations have revealed a cold stream of intergalactic atomic carbon gas feeding star formation in a massive radio galaxy in the young Universe.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Status Report
A Framework for Modeling Polycyclic Aromatic Hydrocarbon Emission in Galaxy Evolution Simulations
We present a new methodology for simulating mid-infrared emission from polycyclic aromatic hydrocarbons (PAHs) in galaxy evolution simulations.