Observations uncover details about the open cluster IC 4996

phys.org | 2/13/2019 | Staff
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Open cluster IC 4996. Credit: Peter Wienerroither.

Using the Vatican Advanced Technology Telescope (VATT) and data from ESA's Gaia satellite, astronomers have conducted a new study of the young open cluster IC 4996 and its vicinity. The research, presented in a paper published January 31 on arXiv.org, reports more details about properties of this cluster.

IC - Cluster - Constellation - Cygnus - Member

IC 4996 is a young open cluster in the constellation Cygnus, believed to be a member of an OB association known as Cygnus OB1 (or Cyg OB1), Although numerous observations of IC 4996 have been performed to date, its distance and age remain uncertain. Some studies suggest that it is located about 5,400 light years away from the Earth, while other papers estimate that it may reside as much as 2,400 light years farther. Similarly, its age estimates range from 6 million to 9 million years in various studies.

In order to resolve these discrepancies and to learn more about the nature of IC 4996, a group of astronomers led by Vytautas Straizys of Vilnius University, Lithuania, conducted their own study of this cluster. For this purpose, they used the 1.8-meter VATT telescope located on Mt. Graham, Arizona, and data from Gaia's Data Release 2 (DR2). Published in April 2018, DR2 contains high-precision measurements, including positions in the sky, parallaxes and proper motions for more than 1 billion sources in the Milky Way galaxy. Such information is crucial for determining distances and ages of stars more accurately.

Article - Parameters - IC - Spectroscopic - MK

"In this article, we attempt to determine the parameters of IC 4996 with new spectroscopic MK types of the brightest stars and...
(Excerpt) Read more at: phys.org
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