Science, Space and Technology News 2024
The Condor Array Telescope has introduced a new era in astronomy, enabling the study of extremely faint cosmic phenomena. Researchers have utilized it to debunk previous misconceptions about stellar structures around NGC 5907 and to uncover groundbreaking details about the dwarf nova Z Camelopardalis, including concentric gas shells.. Credit: Condor Team
According to lead researchers Kenneth M. Lanzetta, PhD, a Professor in the Department of Physics and Astronomy and Stefan Gromoll of Stony Brook, and Michael M. Shara, PhD, Curator in the Department of Astrophysics at the AMNH, Condor is now in full operation.
To test this speculation, the Condor team obtained a new image of Z Cam in November 2021. Then by comparing the positions of the shell in the earlier and later images, they measured the expansion rate of the shell, finding a rate that is indeed consistent with an explosion more than 2000 years ago. “This is the first example ever found of two concentric shells surrounding a dwarf nova, and it confirms a long-standing hypothesis that concentric shells must surround frequently-erupting novae of relatively massive white dwarfs,” says Shara, lead author of the Z Cam paper.
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