June 9, 2011 - A composite picture demonstrating the situation of the 'miniature galaxy' S26 in the galaxy NGC 7793. The picture of S26 is a radio
image, made with a CSIRO telescope although the picture of the galaxy is made from blended X-ray and optical info. Picture credit - Soria et al / CSIRO / ATCA NGC 7793
- NASA, ESO and NOAO.
by Workers Writers
Canberra, Australia (SPX) Nov eleven, 2010
Adhering to a research of what is in impact a miniature galaxy buried within a typical-sized one - like a Russian doll - astronomers utilizing a CSIRO telescope have concluded that huge black holes are much more powerful than we imagined. An international group of astronomers led by Dr Manfred Pakull at the University of Strasbourg in France has learned a 'microquasar' - a modest black hole, weighing only as a lot as a star, that shoots jets of radio-emitting particles into space.
Known as S26, the black hole sits inside a standard galaxy called NGC 7793, which is 13M light-years absent in the Southern constellation of Sculptor.
Earlier this year Pakull and colleagues noticed S26 with optical and X-ray telescopes (the European Southern Observatory's Very Big Telescope and NASA's Chandra space telescope).
Now they have made new observations with CSIRO's Compact Array radio telescope in the vicinity of Narrabri, NSW. These show that S26 is a around-perfect analogue of the much more substantial 'radio galaxies' and 'radio quasars'.
Effective radio galaxies and quasars are virtually extinct today, but they dominated the early Universe, billions of years in the past, like cosmic dinosaurs.