theworking on the puzzle They are looking for that contain dark matter but are probably too faint to have escaped earlier detection. the predicts the existence of a large number of these dwarf around large galaxies like Earth’s, only a cross section can be seen…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/7/7 / 7/ 777b761907_120668_milkyway-galaxy.jpg” data-url=”https://news.google.com/sciences/definitions/universe-milkyway-3729/” data-more=”Read more”> .
It is possible to hunt these dwarf galaxies, and more generally
The quantity…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/b/7/e/b7e2382b95_59611_mer-nuages-seblino-camptocamporg-cc-30.jpg” data -url=”https://news.google.com/planete/definitions/climatologie-nuage-14525/” data-more=”Read more”> of for instance via the famous . Several promising gas clouds that could be associated with faint dwarf galaxies have been discovered by the group of led by Elizabeth Adams of the Netherlands Institute for Radio Astronomy.
These gas clouds were thought to be associated with the Milky Way, and most of them probably are. But when the teams, with researchers like David Sand, an associate professor of astronomy at UArizona, or Michael Jones, a postdoctoral researcher at theArizona Steward Observatory and lead author of a paper on these clouds and deposited freely at— wanted to search associated with them and the dwarf galaxies, they held surprises.
Thus, an unprecedented association of young blue stars forming a group calledand observed with Hubble was actually in the de la Virgen Located at an estimated distance between 48 to 72 million was discovered by the famous French astronomer (1730-1817) known for creating the famous catalog of deep-sky objects that bears his name.
Two hypotheses about the origin of the mysterious “blue spots”
Other observations made with Hubble and the instruments of In 1993, ESO launched the VLT (Very Large Telescope) project and decided to install it at the Cerro Paranal site in the Chilean Andes, where the climate is particularly favorable for astronomical observation. observations. It is…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/f/0/7/f073110cb2_50034377_vlt.jpg” data-url=”https://news.google .com/sciences/definitions/universe-vlt-2147/” data-more=”Read more”>
Symbol: H Atomic Number:…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/3/8/8/38807f95a1_50010101_equinoxprom-eit-big.jpg” data-url =”https://news.google.com/sciences/definitions/chemistry-hydrogen-14495/” data-more=”Read more”> The general
Symbol: He Atomic number: 2 Electrons per energy level: 2 Atomic mass: 4,003 u Most stable isotopes:…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/ 9 / a/e/9ae62bedde_70382_zepplinheliumjpg.jpg” data-url=”https://news.google.com/sciences/definitions/chemistry-helium-4813/” data-more=”Read More”> and them all bathed by clouds containing very little atomic hydrogen thus forming at the end of structures the size of a dwarf galaxy.
the article aboutthus it reports five blue “spots” that are distant from the Milky Way and distant galaxies in the cluster of The passage of a…” data-url=”https://news.google.com/sciences/definitions/physics- virgo-4001/” data-more=”Read more”> with which they are potentially associated, from a distance of up to 300,000 light years.
The presence almost exclusively of blue stars, therefore young, without any Yellow dwarfs fuse hydrogen into helium in…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/ midioriginal/ 4/d /b/4db5f06b53_50034117_equinoxprom-eit-big-09.jpg” data-url=”https://news.google.com/sciences/definitions/universe-dwarf-yellow-29/” data-more= “Read more”>o Since their luminosity is very low (about 1% maximum of that of the Sun), the smallest of them must…” data-image=”https://cdn.futura-sciences.com/buildsv6/ images / midioriginal/d/b/d/dbdabe04e7_50034118_gliese-581-dwarf-red-eso.jpg” data-url=”https://news.google.com/sciences/definitions/astronomy-dwarf-red-31/” data – more=”Read more”> actually detectable, indicates that star formation is recent. However, the presence of many metals indicates that the gas from which these stars formed must have been in a large, ancient galaxy that had time to chemically evolve with several generations of stars carrying on. stellar and ending its life in Excerpt from…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/a/9/4/a940132305_50034136_supernova1987a.jpg” data-url=” https://news.google.com/sciences/definitions/universe-supernova-60/” data-more=”Read more”> , thus expelling the products of this nucleosynthesis to the galaxies. Therefore, we should see, as in the Milky Way, and yellow in abundance.
To resolve this paradox, two theories can be invoked, all of which involvegas ejected from a large galaxy. The first assumes the effect of exerted by one large galaxy on another, forces that would therefore have ripped off gas. The other theory involves a galaxy rapidly colliding with a mass of hot plasma in the galaxy cluster. It can be shown that the collision produces a capable of quickly ripping a mass of gas out of the galaxy. We speak then of an effect called dynamic pressure stripping ( in English).
The researchers are more inclined to the second hypothesis because, to obtain blobs even though they are highly isolated from surrounding galaxies, they must move quickly, which is not compatible with the tidal mechanism hypothesis.
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