The changing source of X-ray reflection in the radio-intermediate Seyfert 1 galaxy III Zw 2

Gonzalez, A. G.; Waddell, Sophia G. H.; Gallo, L. C.

doi:10.1093/mnras/stx3146

Cited by 7 publications

(4 citation statements)

References 57 publications

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“…However, the reflection fraction in the blurred reflector model is below unity (R ≈ 0.22), which is consistent with anisotropic emission away from the accretion disc (e.g. Gonzalez et al 2018). This could be beamed emission that arises in the base of a jet (e.g.…”

Section: The Broadband X-ray Spectrum and Variabilitysupporting

confidence: 67%

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Exploring the spectral variability of the Seyfert 1.5 galaxy Markarian 530 with Suzaku

Ehler

Gonzalez

Gallo

2018

Monthly Notices of the Royal Astronomical Society

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A 2012 Suzaku observation of the Seyfert 1.5 galaxy Markarian 530 was analysed and found to exhibit two distinct modes of variability, which were found to be independent from one another. Firstly, the spectrum undergoes a smooth transition from a soft to a hard spectrum. Secondly, the spectrum displays more rapid variability seemingly confined to a very narrow energy band (∼ 1 − 3 keV). Three physical models (blurred reflection, partial covering, and soft Comptonisation) were explored to characterise the average spectrum of the observation as well as the spectral state change. All three models were found to fit the average spectrum and the spectral changes equally well. The more rapid variability appears as two cycles of a sinusoidal function, but we cannot attribute this to periodic variability. The Fe Kα band exhibits a narrow 6.4 keV emission line consistent with an origin from the distant torus. In addition, features blueward of the neutral iron line are consistent with emission from He-like and H-like iron that could be originating from the highly ionised layer of the torus, but a broad Gaussian profile at ∼ 6.7 keV also fits the spectrum well.

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Section: The Broadband X-ray Spectrum and Variabilitysupporting

confidence: 67%

“…temperature, density), or could be attributed to changes in velocity if the source is indeed moving away from the disc (e.g. Gonzalez et al 2018), which would also result in changes in the reflection fraction.…”

Section: The Broadband X-ray Spectrum and Variabilitymentioning

confidence: 99%

Exploring the spectral variability of the Seyfert 1.5 galaxy Markarian 530 with Suzaku

Ehler

Gonzalez

Gallo

2018

Monthly Notices of the Royal Astronomical Society

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“…III Zw 002, also named Mrk 1501 and PG 0007+106, is a Seyfert 1 AGN classified as a radio-intermediate source at z = 0.089. Studies over the years have reported strong variability in III Zw 002 from high energies (γ-ray and X-ray), to radio (Brunthaler et al 2000(Brunthaler et al , 2005Liao et al 2016;Gonzalez et al 2018). These works have provided information regarding the central engine and jet activities on the subparsec scale for this source.…”

Section: Introductionmentioning

confidence: 92%

First Observation of a Double-peaked O i Emission in the Near-infrared Spectrum of an Active Galaxy

Santos

Rodríguez-Ardila

Panda

et al. 2023

ApJL

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Double-peaked profiles associated with the broad-line region (BLR) of active galactic nuclei (AGNs) are regarded as the clearest evidence of the presence of an accretion disk. They are most commonly detected by means of optical spectroscopy in the Balmer lines and in the Mg ii λ2798 ultraviolet line. Here, we report the first unambiguous detection of a double-peak broad emission line associated with the O i λ11297 emission line in the near-infrared (NIR) in the local Seyfert 1 galaxy III Zw 002. Additionally, we detect simultaneously in the spectrum the double-peak emission in the Paα line and very likely in the He i λ10830. This is the first time that several broad double-peaked NIR emission lines have been detected simultaneously. The double-peaked profiles are fit using a disk-based model, with an additional Gaussian component attributed to nondisk clouds, which represents the classical BLR. Our results obtained from the fits reveal important parameters, such as disk inclination and geometry. From the double-peaked profile fits, we suggest that the BLR in III Zw 002 has a disk-like geometry, as it extends up to the outer edge of the BLR.

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“…The seed photons of the warm Comptionization were assumed to come from the inner disk emission (i.e., T dbb was linked to T 0 of comt). We adopted the plasma temperature of the Comptonized disk to constrain the low-energy cutoff for the power-law component, and the high-energy cutoff was set to 300 keV (Gonzalez et al 2018;Buhariwalla et al 2020). We modeled the Galactic neutral absorption with the hot model (de Plaa et al 2004;Steenbrugge et al 2005).…”

Section: Spectral Analysismentioning

confidence: 99%

On the Connection between the Repeated X-Ray Quasiperiodic Oscillation and Warm Absorber in the Active Galaxy RE J1034+396

Zhou 周,

Mao 毛,

Fang 方

et al. 2024

ApJ

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We conduct an in-depth spectral analysis of ∼1 Ms XMM-Newton data of the narrow line Seyfert 1 galaxy RE J1034+396. The long exposure ensures high spectral quality and provides us with a detailed look at the intrinsic absorption and emission features toward this target. Two warm-absorber (WA) components with different ionization states ( log ( ξ / erg cm s − 1 ) ∼ 4 and log ( ξ / erg cm s − 1 ) ∼ 2.5 – 3 ) are required to explain the intrinsic absorption features in the Reflection Grating Spectrometer spectra. The estimated outflow velocities are around −1400 km s−1 and −(100–300) km s−1 for the high- and low-ionization WA components, respectively. Both absorbers are located beyond the broad-line region and cannot significantly affect the host environment. We analyze the warm absorbers in different flux states. We also examine the 2007 May observation in the low and high phases of quasiperiodic oscillation (QPO). In contrast to previous analyses showing a negative correlation between the high-ionization WA and the QPO phase, we have found no such variation in this WA component. We discover a broad emission bump in the spectral range of ∼12–18 Å, covering the primary features of the high-ionization WA. This emission bump shows a dramatic change in different source states, and its intensity may positively correlate with the QPO phase. The absence of this emission bump in previous work may contribute to the suggested WA–QPO connection.

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The changing source of X-ray reflection in the radio-intermediate Seyfert 1 galaxy III Zw 2

Cited by 7 publications

References 57 publications

Exploring the spectral variability of the Seyfert 1.5 galaxy Markarian 530 with Suzaku

Exploring the spectral variability of the Seyfert 1.5 galaxy Markarian 530 with Suzaku

First Observation of a Double-peaked O i Emission in the Near-infrared Spectrum of an Active Galaxy

On the Connection between the Repeated X-Ray Quasiperiodic Oscillation and Warm Absorber in the Active Galaxy RE J1034+396

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