Przemek Mróz, a graduate student at the University of Warsaw said, “Warping of the Galactic disk has been detected before, but this is the first time we can use individual objects to trace its shape in three dimensions. A unique three-dimensional map of the Milky Way The mao demonstrates that the Milky Way circle isn’t flat, instead, it is warped at distances more prominent than 25,000 light-years from the Galactic center. It is the first map that is based on direct distances to thousands of individual objects as distant as the expected boundary of the Galactic disk. To create a new three-dimensional map of the Milky Way, scientists used a sample of over 2,400 Cepheids, the majority of which have been newly identified in the photometric data collected by the Optical Gravitational Lensing Experiment (OGLE) survey.
![galactic disk map galactic disk map](https://theforce.net/swtc/Pix/books/dk/galaxy0.jpg)
The presence of interstellar dust and gas causes additional difficulty that may dim the brightness of a Cepheid. The separation would then be able to be controlled by contrasting the apparent and inherent brightness. Cepheids are young pulsating supergiants, their splendor changes in a regular pattern with a well-characterized period which may run from hours to several dozen days.Ĭepheids follow a relation between their pulsation period and radiance, permitting the intrinsic glow of a Cepheid to be construed from its period.
![galactic disk map galactic disk map](https://img.dtcn.com/image/image_7453e-milky-way-3d-map1-1920x2568.jpg)
The most powerful strategy for contemplating the state of the Milky Way is legitimately measured distances to a large sample of stars of a particular sort, which would enable one to build the three-dimensional map of the Galaxy.Ĭepheid variable stars are ideal for this task. In any case, the separations to these tracers are estimated in a roundabout way and are model-dependent. The present learning about the state of the Milky Way disk depends on different tracers, (for example, star counts or radio perceptions of gas molecules) informed by the extrapolation of structures seen in different galaxies.