Radio Follow-up Observations of a Weak-line Quasar Exhibiting Remarkable X-Ray Variability
SDSS J1539+3954 ( z ≈ 1.935), a radio-quiet weak-line quasar (WLQ), exhibited exceptional X-ray variability in 2019–2020, with its X-ray flux increasing by over 20 times from 2013 to 2019 and subsequently dropping by at least a factor of 9 in 2020. Motivated by the empirical correlations between X-...
Збережено в:
| Автори: | , , , , , , , , |
|---|---|
| Формат: | Artigo |
| Мова: | Inglês |
| Опубліковано: |
IOP Publishing
2025-01-01
|
| Серія: | The Astrophysical Journal |
| Предмети: | |
| Онлайн доступ: | https://doi.org/10.3847/1538-4357/ae1957 |
| Теги: |
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|