Large-amplitude Rapid X-Ray Variability in the Narrow-line Seyfert 1 Galaxy PG 1404+226
نویسندگان
چکیده
منابع مشابه
X - ray variability of the Narrow Line Seyfert 1 Galaxy PKS 0558 − 504
We present results from several XMM-Newton observations of the radio loud Narrow-line Seyfert 1 galaxy (NLS1) PKS 0558-504. We find evidence for strong and persistent X-ray variability, both on short and long timescales. On short time scales of > ∼ 2 hours the source varies smoothly by 15−20%; long term variations by a factor > ∼ 2 could not be resolved in the relatively short exposures: we fin...
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We present a systematic analysis of the X-ray spectral properties of a sample of 22 “narrow-line” Seyfert 1 galaxies for which data are available from the ASCA public archive. Many of these sources, which were selected on the basis of their relatively narrow Hβ line width (FWHM ≤2000 km/s), show significant spectral complexity in the X-ray band. Their measured hard power-law continua have photo...
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We report on the XMM-Newton timing properties of the most X-ray variable, radioquiet, Narrow-Line Seyfert 1 galaxy IRAS 13224–3809. IRAS 13224–3809 continues to display the extremely variable behavior that was previously observed with ROSAT and ASCA; however, no giant, rapid flaring events are observed. We detect variations by a factor as high as ∼8 during the 64 ks observation, and the variabi...
متن کاملHow the X-ray spectrum of a Narrow-Line Seyfert 1 galaxy may be reflection dominated
A model for the inner regions of accretion flows is presented where, due to disc instabilities, cold and dense material is clumped into deep sheets or rings. Surrounding these density enhancements is hot, tenuous gas where coronal dissipation processes occur. We expect this situation to be most relevant when the accretion rate is close to Eddington and the disc is radiation-pressure dominated, ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2018
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aad193