تقرير
Tracking the spectral properties across the different epochs in ESO 511-G030
| العنوان: | Tracking the spectral properties across the different epochs in ESO 511-G030 |
|---|---|
| المؤلفون: | Middei, R., Petrucci, P. -O., Bianchi, S., Ursini, F., Matzeu, G. A., Vagnetti, F., Tortosa, A., Marinucci, A., Matt, G., Piconcelli, E., De Rosa, A., De Marco, B., Reeves, J., Perri, M., Guainazzi, M., Cappi, M., Done, C. |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies |
| الوصف: | The Type I active galactic nucleus (AGN) ESO 511-G030, a formerly bright and soft-excess dominated source, has been observed in 2019 in the context of a multi-wavelength monitoring campaign. However, in these novel exposures, the source was found in a $\sim$10 times lower flux state, without any trace of the soft-excess. Interestingly, the X-ray weakening corresponds to a comparable fading of the UV suggesting a strong link between these components. The UV/X-ray spectral energy distribution (SED) of ESO 511-G030 shows remarkable variability. We tested both phenomenological and physically motivated models on the data finding that the overall emission spectrum of ESO 511-G030 in this extremely low flux state is the superposition of a power-law-like continuum ($\Gamma\sim$1.7) and two reflection components emerging from hot and cold matter. has Both the primary continuum and relativistic reflection are produced in the inner regions. The prominent variability of ESO 511-G030 and the lack of a soft-excess can be explained by the dramatic change in the observed accretion rate, which dropped from an L/L$_{\rm Edd}$ of 2\% in 2007 to 0.2\% in 2019. The X-ray photon index also became harder during the low flux 2019 observations, perhaps as a result of a photon starved X-ray corona. Comment: 18 pages, 14 figures, accepted for publication in A&A |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2302.03705 |
| رقم الأكسشن: | edsarx.2302.03705 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |