Stefan Gillessen, an astronomer at the Max Plack Institute and advocate of the transmitter hypothesis, suggests that it is unlikely that all objects have been formed from a binary fusion, and postulates that G sources can be a handful of different cosmic phenomena and odd as young stellar objects. or stellar knots of the wind.
It does seem like the G objects have a lot in common, whatever they are, and expanding the dataset can only provide more information to tease out the puzzle.
Milky Way's supermassive black hole, known as Sagittarius A*, is known for its huge gravitational pull that attracts various cosmic objects such as dust, gas and even stars to its center. Although the stellar objects were not like anything they have seen before, the astronomers noted that they displayed features that are very familiar. The gravitational pull is so much stronger.
The team identified the first of these objects in 2005 and named it G1.
Writing in the Nature journal, the group explained its belief that all six were once binary stars - a pair of stars which orbit each other - later merging as one due to the supermassive black hole's powerful gravitational force. This led to suggestions G2 was a large star cocooned in dust. This caused the newly-formed object to appear like a giant cloud of gas.
It's unclear exactly what they are, but G2's intact emergence from periapsis in 2014 - that is, the closest point in its orbit to the black hole - was, Ghez believes, a big clue.
"At the time of closest approach, G2 had a really unusual signature", Ghez said.
"Black holes may be driving binary stars to merge", study co-author Andrea Ghez, a professor of astrophysics at the University of California, Los Angeles, said in a statement. "When that happens, it might be able to produce an impressive fireworks show since the material eaten by the black hole will heat up and emit copious radiation before it disappears across the event horizon".
The G objects look compact most of the time and stretch out when their orbits bring them closest to the black hole.
A 2d team of researchers, from the Max Planck Institute, countered that G2 would maybe per chance per chance undoubtedly be a gasoline cloud, suggesting it became as soon as allotment of the next movement of gasoline that moreover incorporated G1. Our galaxy's supermassive black hole, called Sagittarius A* (or Sgr A*), constantly pulls stars, dust and other matter inward, forming a stellar megalopolis 1 billion times denser than our corner of the galaxy.
Its gravity alters the orbits of the two stars until the duo crash into each other. Also, such mergers release materials that can feed the black hole, says the study. The core containing the dust did not stretch much and remained intact. The star's mass helps to keep the gas together and away from the black hole, Ciurlo explained. "We are learning how galaxies and black holes evolve".
These observations stem from data collected over 20 years to make these observations, thanks to the WM Keck Observatory in Hawaii. "It went from being a pretty innocuous object when it was far from the black hole to one that was really stretched out and distorted at its closest approach and lost its outer shell, and now it's getting more compact again".