Cosmic dance produces a new galaxy in NGC 3166/9

A team of astronomers from Queen's University, the Royal Military College of Canada (RMCC) and their world-wide collaborators have detected what is believed to be a "tidal" dwarf galaxy (TDG). Only a handful of bona-fide TDGs have been identified and this particular candidate is the first that has been discovered by the international research team, using high-resolution follow-up observations of the cold group gas mapped by the Arecibo Legacy Fast ALFA (ALFALFA) survey. This detection places tight constraints on the history of its neighbouring galaxies and gives insight into the processes that drive universal galaxy formation and evolution.

The baby-sized galaxy, formed during a cosmic dance between its parents: NGC 3166 and NGC 3169, has all the hallmarks of a TDG. It is located at the high density tip of a gas-rich tidal steam of material, has sufficient mass to be self-gravitating, coincides with an active stellar region and contains little . The presence of this TDG has strong implications about the dynamics within the NGC 3166/9 group of galaxies.

This research is part of a larger program spearheaded by the Queen's/RMCC team to understand the processes that shape galaxies in group environments. One of the lead researchers, Karen Lee-Waddell, will be presenting these findings at the annual Canadian Astronomical Society meeting in Calgary, Alberta on June 7, 2012.

The team would like to thank the many ALFALFA team members who contributed to this project.


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Citation: Cosmic dance produces a new galaxy in NGC 3166/9 (2012, June 20) retrieved 16 July 2019 from https://phys.org/news/2012-06-cosmic-galaxy-ngc.html
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Jun 21, 2012
One needs to be wary of statements made in this article:
insight into the processes that drive universal galaxy formation

the way this is stated could be interpreted as people having a good, firm grasp on the "formation" of galaxies through natural processes. This is not the case - there is currently no agreed or fully documented and accepted theory that reveals how galaxies are supposed to form from gaseous substances.
coincides with an active stellar region and contains little dark matter.

There is also no accepted and substantiated theory for the formation of stars from a cloud of gas. Although most cosmologists would like to make the nebular theory a fact, everyone knows that it hasn't been verified and perhaps cannot be verified through direct observation. Furthermore, dark matter is invisible and undetectable and to date no one has confirmed its existence. So here we again have the case where researchers are using speculative theory as if it were already a fact.

Jun 21, 2012
Furthermore, God is invisible and undetectable and to date no one has confirmed its existence. So here we again have the case where Christians are using speculative theory as if it were already a fact.

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