| Autor: |
Alok C. Gupta |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Galaxies, Vol 6, Iss 1, p 1 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2075-4434 |
| DOI: |
10.3390/galaxies6010001 |
| Popis: |
We reviewed multi-wavelength blazars variability and detection of quasi-periodic oscillations on intra-day timescales. The variability timescale from a few minutes to up to less than a days is commonly known as intra-day variability. These fast variations are extremely useful to constrain the size of the emitting region, black hole mass estimation, etc. It is noticed that in general, blazars show intra-day variability in the complete electromagnetic spectrum. However, some classes of blazars either do not show or show very little intra-day variability in a specific band of the electromagnetic spectrum. Blazars show rarely quasi-periodic oscillations in time series data in optical and X-ray bands. Other properties and emission mechanisms of blazars are also briefly discussed. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
