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5 days ago · Early-type galaxies (ETGs, i.e. elliptical and lenticular galaxies) differ in their amount of rotational support -- some are purely supported by velocity dispersion, while others show pronounced ordered rotation. Cosmological hydrodynamical simulations show that the progenitors of all ETGs were first rotating quickly, but then mergers decreased their rotational support. In the presented work ...
5 days ago · Using ‘spatially’ resolved spectroscopy, we investigated the characteristics and different modes of formation of stars in elliptical galaxies. We identified an unusual population of 59 star-forming elliptical (SF-E) galaxies in SDSS-MaNGA, our primary sample. To identify these rare star-forming ellipticals,
1 day ago · Within the last five years, astronomers have discovered a new type of astronomical phenomenon that exists on vast scales – larger than whole galaxies. They’re called ORCs (odd radio circles ...
1 day ago · Sometimes, ORCs surround a visible galaxy, but not always (eight have been discovered to date around known elliptical galaxies). Using ESA’s XMM-Newton telescope, Bulbul and her team observed one of the nearest known ORCs, an object called the Cloverleaf, and found a striking X-ray component to the object.
4 days ago · Elliptical galaxies contain only population II stars because they are older and lack the ongoing star formation which are typically associated with Population I stars. II stars are formed from the remnants 5. What happens to spiral galaxies during galaxy mergers? During galaxy mergers, the structures of spiral galaxies are completely disrupted.
5 days ago · Directions: Read the following paragraphs about the different types of galaxies. Spiral galaxies have a central bulge surrounded by a disk of gas, dust, and stars that spiral outwards. These galaxies typically have two or more spiral arms, which contain many young stars, as well as clusters of older stars. The Milky Way, our own galaxy, is a ...
5 days ago · galaxies have significantly different properties compared to non-void galaxies (in the IllustrisTNG simulation), which may impact the link to cosmological information. In this work, we investigate whether individual void galaxies contain more pristine information about cos-mology than galaxies residing in other environments.
