Stars

A false-color submillimeter-wavelength image of the IRAS 15398-3359 system (Image courtesy Yuki Okoda, Graduate School of Science, The University of Tokyo. All rights reserved)

An article published in the “Astrophysical Journal Letters” describes a study on the co-evolution of stars and protoplanetary disks based on the class 0 protostar cataloged as IRAS 15398-3359. A team of astronomers from the Department of Physics at the University of Tokyo led by Professor Yoko Oya used the ALMA radio telescope for this research, discovering a dense disk of materials around the protostar that could be a precursor to a planetary system. This discovery could improve our knowledge of the formation of solar systems.

The Serpens Main star-forming cluster with SMM4A and SMM4B in the inset (Image ESO/ALMA(ESO/NAOJ/NRAO)/Aso et al.)

An article published in the “Astrophysical Journal” describes the observation of the growth of two class 0 protostars. A team led by Dr. Yusuke Aso of the Academy Sinica Institute of Astronomy and Astrophysics (ASIAA, Taiwan) used the ALMA radio telescope to study their different evolutionary states obtaining a series of details on the protostars cataloged as SMM4A and SMM4B. Class 0 protostats have their peak emissions at submillimetric wavelengths making ALMA ideal to get to know star gestation better.

An ancient galaxy with a frantic star formation

An article published in the journal “Nature” describes the mapping of a galaxy known as COSMOS-AzTEC-1 that showed peculiar characteristics. A team of astronomers used the ALMA radio telescope to study this starburst galaxy, a class in which there’s considerable star formation. COSMOS-AzTEC-1 is very far away so we see it as it was 12.4 million years ago and very massive and could be the progenitor of today’s large elliptical galaxies so this type of research could provide new information on their evolution.

NGC 3918 (Image ESA/Hubble and NASA)

A new image captured by the Hubble Space Telescope shows the planetary nebula NGC 3918, nicknamed the “Blue Planetary” or “The Southerner”. Its shape in some ways reminds of an eye with special colors and seeing it is a lucky event because it will not last long in astronomical terms since this phase will end within a few tenth of millennia.

Milky Way panorama (Image ESO/S. Brunier)

An article published in the journal “Nature” describes a research on star formation in the Milky Way. According to Masafumi Noguchi of Tohoku University there were two star formation periods separated by 2 billion years. In essence, our galaxy had a first period in which it was vital then it died and after about 2 billion years star formation restarted in a sort of second life. According to this theory, during that period of death the gas present in the Milky Way got enriched with iron, the reason why stars like the Sun have a greater amount of it than others.