Researchers from the Center for Astrological Biology have drawn the most detailed map to date, which shows the huge blue stars near our solar system and the spiral arms of the Milky Way. In doing so, they discovered something unexpected: an unknown structure connecting the spiral arm of Orion and the spiral arm of Perseus.
This Huge blue star (Scientifically known as OB star Between spectral categories O and B), they have a particularity, which makes them particularly interesting for astrophysicists: they have a Short lives of millions of years.
Just as the dating of rocks reveals the level of geological activity of planets, the existence of OB stars in the Milky Way is an indicator of the activity of our Milky Way, because they indicate Star forming zone. No matter where they are, it can be said that the Milky Way is “alive,” and they are the regions where new stars originate.
On the other hand, these short-lived stars do not have time to leave their birth region, the spiral arms, so they too Excellent reference for mapping these galaxy structures.
With these advantages, in this case, by Center for Astrobiology (CAB, CSIC-INTA) The largest existing catalog of massive OB stars in the Milky Way has been fully updated: the so-called catalog Alma Glowing Star (When), Which was compiled 20 years ago and contains nearly 20,000 objects.
Over the past few months, the author has cross-compared the raw data of each star with the latest data provided by the European Space Agency (ESA) Gaia mission.Specifically, from Gaia DR2 (Data release 2) To get an updated catalog, although soon they will use the more accurate data provided by Gaia EDR3 to perform more operations.
Spiral Map of the Milky Way
But for now, the results achieved so far have been published in the journal Monthly notice from the Royal Astronomical Society (MNRAS), Has made the first tracking possible The most detailed map of the spiral arms of our galaxy.
The spiral arms of the Milky Way. Between Orion and Perseus will be the recently discovered Cepheid variable star. / NASA / JPL-Caltech / ESO /R.hurt
How to stand out Michelangelo Pantaleroni GonzalezCAB researchers and the main author of this study, “Having such a new sample of stars allows us to review which aspects of the galactic environment behave more clearly, which is surprising.
The map is so detailed that it can find Something no one has seen until now: A branch of the spiral arm where our solar system (Orion) is located.Researchers call it “Severs’s Spur”: Branch line (stimulate In English) because they are called this type of structure between the arm and Uranus, because it is the most prominent constellation.
The new structure is about 10,000 light-years in length and extends outward to the next arm (the arm of Perseus), which also rises above the plane of the Milky Way.
Regarding its origin, Jesus CornApellánizCAB researchers and research co-authors explained: “Recently it has been proposed that there is a kind of Radcliffe Wave As an oscillation of the vertical distribution (relative to the plane of the Milky Way) of young stars in our environment. The study proposed vibration as a phenomenon, and now we have seen it happen in two dimensions.
He added that the spikes of Cepheus are undulating crests, while the valleys are formed by other regions formed by stars such as the Orion and Rosetta Nebula.This phenomenon is called corrugaciónIn other words, the folds on the plane of the Milky Way are like a piece of cloth, lying on the ground without stretching. This is the best proof of its existence in the solar environment.
Pantaleoni concluded: “It is interesting that the large amount of data obtained through the Gaia mission and the use of statistical tools allow us to draw interesting general conclusions about the environment, such as Signs of deformation of the Milky Way (Distorted) and Ripple candy Disk, May be the remains of the evolution of galactic convulsions”.
M Pantaleoni González, J Maíz Apellániz, RH Barbá and B Cameron Reed. “The Alma catalog of the OB star. 2. Cross-compared with Gaia DR2 and updated the map of the solar community.” Monthly Bulletin of the Royal Astronomical Society, 2021.