The existence of mostly young stars and little gas signals that these systems must have lost their gas recently.' The combination of blue stars and lack of gas was unexpected, as was a lack of older stars in the systems. 'In fact, there must be some molecular gas because they are still forming stars. 'We observed that most of the systems lack atomic gas, but that doesn't mean there isn't molecular gas,' Jones said. This is significant because star formation begins with atomic hydrogen gas, which eventually evolves into dense clouds of molecular hydrogen gas before forming into stars. Together, the team learned that most of the stars in each system are very blue and very young and that they contain very little atomic hydrogen gas. Study co-author Michele Bellazzini, with the Istituto Nazionale di Astrofisica in Italy, led the analysis of the data from Very Large Telescope and has submitted a companion paper focusing on that data. 'When you're looking for things, you're not necessarily going to find the thing you're looking for, but you might find something else very interesting.' The team obtained their observations from the Hubble Space Telescope, the Very Large Array telescope in New Mexico and the Very Large Telescope in Chile. 'It's a lesson in the unexpected,' Jones said. Jones presented the findings, which Sand co-authored, during the 240th American Astronomical Society meeting in Pasadena, California, Wednesday. SECCO1 was one of the very unusual 'blue blobs,' said Michael Jones, a postdoctoral fellow in the UArizona Steward Observatory and lead author of a study that describes the new stellar systems. The gas clouds were thought to be associated with our own galaxy, and most of them probably are, but when the first collection of stars, called SECCO1, was discovered, astronomers realized that it was not near the Milky Way at all, but rather in the Virgo cluster, which is much farther away but still very nearby in the scale of the universe. Once that catalog was published, several research groups, including one led by UArizona associate astronomy professor David Sand, started looking for stars that could be associated with those gas clouds.

The astronomers found the new systems after another research group, led by the Netherlands Institute for Radio Astronomy's Elizabeth Adams, compiled a catalog of nearby gas clouds, providing a list of potential sites of new galaxies. The five systems are separated from any potential parent galaxies by over 300,000 light-years in some cases, making it challenging to identify their origins. The stellar systems - which astronomers say appear through a telescope as 'blue blobs' and are about the size of tiny dwarf galaxies - are located within the relatively nearby Virgo galaxy cluster. The new stellar systems contain only young, blue stars, which are distributed in an irregular pattern and seem to exist in surprising isolation from any potential parent galaxy. Washington, June 20 (ANI): A new class of stellar systems has been identified- they're not quite galaxies and only exist in isolation, according to the researchers at University of Arizona.

Stellar ram pressure