The Warsaw Telescope and Galactic Cepheids from OGLE (K. Ulaczyk / J. Skowron / OGLE)
Report: A three-dimensional map of the Milky Way using classical Cepheid variable stars
D. M. Skowron, J. Skowron, P. Mróz, A. Udalski, P. Pietrukowicz, I. Soszyński, M. K. Szymański, R. Poleski,
S. Kozłowski, K. Ulaczyk, K. Rybicki, and P. Iwanek
2019, Science, doi:10.1126/science.aau3181
Press release in PDF, Press release in TXT, Press release in ODT. Author explainer video in MP4 in english, also version with subtitles.
Polish version:
Press release in PDF,
Press release in TXT,
Press release in ODT.
Author explainer video in MP4 in polish.
The Warsaw Telescope and Galactic Cepheids from OGLE (K. Ulaczyk / J. Skowron / OGLE)
Cepheid variables change their brightness with time as a result of stellar pulsations. Periods of Cepheids ranges from 1 to 100 days. The maximum in brightness is typically 130% to 230% of the minimum. (Przemek Mróz / OGLE).
| MP4 video: | 558x432, 25fps (english) |
| 558x432, 25fps (polish) | |
| Animated GIF: | 558x432, 25fps (english) |
| 558x432, 25fps (polish) |
Milky Way Cepheids on the Milky Way map (plot by J. Skowron / OGLE, The Milky Way panorama by Serge Brunier, with permission)
| MP4 video: | Milky Way panorama only (by Serge Brunier, modified by J. Skowron) |
3D structure of the Milky Way based on more than 2000 Cepheid variable stars with precisely measured distances. Credit: Jan Skowron / OGLE / Astronomical Observatory, University of Warsaw.
Video formats and sizes:
| HTML5 video tag | 24 fps | 2400x1440 (16 MB) | 1800x1080 (12 MB) | 1200x720 (6.9 MB) | 900x540 (4.6 MB) |
| WebM video | 24 fps | 2400x1440 (16 MB) | 1800x1080 (9.8 MB) | 1200x720 (5.1 MB) | 900x540 (3.1 MB) |
| MP4 video | 24 fps | 2400x1440 (15 MB) | 1800x1080 (8.3 MB) | 1200x720 (3.7 MB) | 900x540 (2.1 MB) |
| 12 fps | 2400x1440 (7.5 MB) | 1800x1080 (4.2 MB) | 1200x720 (1.9 MB) | 900x540 (1.1 MB) | |
| Older formats | 25 fps HQ | WMV (MPEG-4, 22 MB) | AVI (MPEG-4, 22 MB) | ||
| MP4 video | 25 fps HQ | 2400x1440 (39 MB) | 1800x1080 (22 MB) | ||
| MP4 video | 50 fps Full HD | normal (42 MB) | no captions (42 MB) | no rules, no captions (42 MB) |
Note: HTML5 video tag can be directly embeded into the html web page source, for eg. with the <iframe>.
Still images:
Warped galaxy with the distribution of the young stars (Cepheids) in the disk as infered from the Galactic Cepheids distribution (J. Skowron / OGLE)
| Other variants: | no scale, | galaxy alone |
| polish version |
Age tomography of the Milky Way Cepheids. Oldest stars (red) are 400 million years old, and the youngest (blue) are 30 million years old. Top view on the Milky Way. (Jan Skowron / OGLE).
| Different sizes: | 2400x1440, | 1800x1080, | 1200x720, | 900x540 |
Star formation episodes in the spiral arms of the Milky Way consistent with the current position and ages of the newly discovered Milky Way Cepheids from OGLE. Credit: Jan Skowron / OGLE / Astronomical Observatory, University of Warsaw.
Video formats and sizes:
| HTML5 video tag | 24 fps | 2400x1440 (9.7 MB) | 1800x1080 (6.6 MB) | 1200x720 (3.8 MB) | 900x540 (2.8 MB) |
| WebM video | 24 fps | 2400x1440 (17 MB) | 1800x1080 (12 MB) | 1200x720 (5.8 MB) | 900x540 (3.4 MB) |
| MP4 video | 24 fps | 2400x1440 (26 MB) | 1800x1080 (15 MB) | 1200x720 (6.4 MB) | 900x540 (3.6 MB) |
| 12 fps | 2400x1440 (14 MB) | 1800x1080 (7.5 MB) | 1200x720 (3.4 MB) | 900x540 (1.9 MB) | |
| Older formats | 25 fps | WMV (MPEG-4, 34 MB) | AVI (MPEG-4, 34 MB) | ||
| MP4 video | 25 fps HQ english | 2400x1440 (65 MB) | 1800x1080 (37 MB) | ||
| MP4 video | 25 fps HQ polish | 2400x1440 (65 MB) | 1800x1080 (37 MB) | ||
| MP4 video | 25 fps HQ no captions | 2400x1440 (65 MB) | 1800x1080 (37 MB) | ||
| MP4 video | 50 fps Full HD | english (74 MB) | polish (74 MB) | no captions (74 MB) |
Note: HTML5 video tag can be directly embeded into the html web page source, for eg. with the <iframe>.
Comparison of simulation of three main star forming episodes in the spiral arms to the currently observed Cepheids variable. Oldest stars (red) are 400 million years old, and the youngest (blue) are 30 million years old. Top view on the Milky Way — left simulation, right observations. (Jan Skowron / OGLE).
| Different sizes: | 2400x1440, | 1800x1080, | 1200x720, | 900x540 |
| Polish version: | 2400x1440, | 1800x1080, | 1200x720, | 900x540 |
Top view on the 2400 Milky Way Cepheids discovered to date. (Jan Skowron / OGLE).
| Different sizes: | 2400x1440, | 1800x1080, | 1200x720, | 900x540 |
