| Autor: |
Saha, Abhijit, Vivas, K., Olszewski, E., Olsen, Knut |
| Rok vydání: |
2019 |
| Předmět: |
|
| DOI: |
10.5281/zenodo.2595400 |
| Popis: |
Minimum light colors of RR Lyrae stars (which are both standard color markers as well as standard candles) measured with the DECam imager on the Blanco 4m telescope at CTIO in select fields in the Galactic bulge are used to independently derive the extinction law in these visible passbands. Variations in the color-color diagrams on sub-arc-minute scales allow the construction of reddening maps that can be anchored to the RR Lyrae color scale, yielding reddening and extinction corrected color-magnitude diagrams of unprecedented clarity that reveal interesting features and characteristics of stellar populations in the bulge, including a very blue horizontal branch and surprisingly young stars with super-solar abundance. The extinction corrected RR Lyrae stars also trace the density distribution of the ancient stars, and structure in the reddening maps show remnants from the past. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
