Wavelength-resolved reverberation mapping of quasar CTS C30.10: Dissecting Mg II and Fe II emission regions

Prince, Raj; Czerny, B.; Trzcionkowski, Piotr; Bronikowski, Mateusz; Figaredo, Catalina Sobrino; Panda, Swayamtrupta; Martínez-Aldama, Mary Loli; Hryniewicz, Krzysztof; Jaiswal, Vikram Kumar; Śniegowska, Marzena; Naddaf, Mohammad-Hassan; Bilicki, Maciej; Haas, Martín; Sarna, M. J.; Karas, Vladimír; Olejak, Aleksandra; Przyłuski, Robert; Rałowski, Mateusz; Udalski, A.; Sefako, R.; Genade, Anja; Worters, Hannah L.

doi:10.1051/0004-6361/202243194

Cited by 12 publications

(7 citation statements)

References 114 publications

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“…This prediction is made by using the time when the calculated downstream flow (black solid line; left panel in Figure 4) matches the observed velocity offset of Mg II (orange solid line): t ≈ 27 yr. Based on this time, the predicted radius of the Mg II line is 0.131 pc (blue arrow; right panel). This closely agrees with the mean of the estimates from various RL relations: R MgII = 0.117 ± 0.005 pc (see Figure 3; Vestergaard & Osmer 2009;Trakhtenbrot & Netzer 2012;Czerny et al 2019;Zajacek et al 2020;Prince et al 2022).…”

Section: Post-shock Outflowsupporting

confidence: 89%

A Broad-line Quasar with Unexplained Extreme Velocity Offsets: Post-shock Outflow?

Rusakov

Steinhardt

Schramm

et al. 2023

ApJ

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The quasar SDSS 0956 + 5128 exhibits three distinct velocity components with large offsets in emission: the systemic velocity of [O ii], [O iii], and [Ne iii] narrow lines have redshift z = 0.7142; the broad Mg ii line is shifted by −1200 km s−1 with respect to the narrow lines; the broad Hα and Hβ lines are at −4100 km s−1. We present new Hubble Space Telescope spectra of Lyα and C iv emission lines and high-resolution images of the quasar. The offsets of these lines are consistent with the velocity component of the Balmer emission, and the photometry in optical and near-infrared wavelengths does not show any signs of recent mergers in the host galaxy or irregularities in the location of the quasar. The data do not confirm predictions of the previous most likely hypotheses involving a special orientation and morphology of the quasar disk, such as in the recoiling black hole scenario, neither it is consistent with accretion disk winds. Instead, based on the cumulative evidence, we propose a new scenario, in which the broad-line region is in the state of outflow caused by a strong shock wave, with a supernova as a possible event for producing the shock ejecta.

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Section: Post-shock Outflowsupporting

confidence: 89%

A Broad-line Quasar with Unexplained Extreme Velocity Offsets: Post-shock Outflow?

Rusakov

Steinhardt

Schramm

et al. 2023

ApJ

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“…Here we combine the sample of RM quasars with significant (>2σ) detections from the SDSS RM program (163 sources; Shen et al 2016Shen et al , 2023Homayouni et al 2020), OzDES RM program (25 sources;Yu et al 2023), and 6 sources from other RM campaigns (Metzroth et al 2006;Lira et al 2018;Czerny et al 2019;Prince et al 2022Prince et al , 2023. Altogether we collected 194 measurements, which is one of the largest samples of RM MgII AGN up to today.…”

Section: He0413 and Uv Mgii And Feii R−l Relationsmentioning

confidence: 99%

“…We also revisit the UV FeII R−L relation, which was first presented in Prince et al (2022) for 2 measurements only and in Prince et al (2023) for 4 measurements, given the updated time delay for HE0413−4031 presented in Sect. 4.3.…”

Section: He0413 and Uv Mgii And Feii R−l Relationsmentioning

confidence: 99%

UV FeII emission model of HE 0413−4031 and its relation to broad-line time delays

Zajaček,

Panda,

Pandey

et al. 2024

A&A

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FeII emission is a well-known contributor to the UV spectra of active galactic nuclei and the modeling of this part may affect the results obtained for the Mg II $ emission, which is one of the lines used for black hole mass measurements and cosmological applications. We tested different FeII emission models when modeling the UV emission of the intermediate-redshift quasar HE 0413-4031 to see how the use of a specific template affects the Mg II $ line properties and the measurement of the Mg II $ and UV Fe II time delays with respect to the continuum. We used the 11-year monitoring of the selected quasar HE 0413-4031 with the South African Large Telescope (SALT), and we supplemented this monitoring with the near-IR spectrum taken with the SOAR telescope, which gave access to the Hbeta $ and OIII 4959,5007$ emission lines at the rest frame and allowed for a precise measurement of the redshift. A new redshift determination ($z=1.39117 0.00017$) using OIII 4959,5007$ gave a very different value than the previous determination based only on the UV FeII pseudocontinuum ($z=1.3764$). It favors a different decomposition of the spectrum into MgII and UV FeII emissions. The line characteristics and the time delay of the MgII emission $ days) are not significantly affected. However, in comparison with the previous analysis, the rest-frame UV FeII time delay ($251^ km/s $ that is only slightly smaller than the MgII line FWHM. Hence the FeII-emitting material is more distant than the MgII-emitting gas in HE 0413-4031 by $ 0.023$ pc (4700 AU). The inferred velocity shift of both MgII and UV FeII lines with respect to the systemic redshift is now rather low, below 300 km $. In addition, we constructed an updated MgII radius-luminosity ($R-L$) relation from 194 sources, which is more than double the previous sample. The MgII $R-L$ relation is flatter than the UV FeII, optical FeII, and Hbeta $R-L$ relations. While the new decomposition of the spectrum is satisfactory, we see a need to create better FeII templates using the newest version of the code CLOUDY

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“…Nearby, faint sources require very dense monitoring, while bright distant quasars require long monitoring of several years to measure the delay of the broad emission lines (e.g. Lira et al 2018;Czerny et al 2019;Zajaček et al 2020Zajaček et al , 2021Prince et al 2022). The time delay for the continuum has not been measured so far for distant quasars and can be done best with dedicated telescopes.…”

Section: Future Prospectsmentioning

confidence: 99%

Accretion disks, quasars and cosmology: meandering towards understanding

Czerny

Cao

Jaiswal

et al. 2023

Astrophys Space Sci

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As Setti and Woltjer noted back in 1973, one can use quasars to construct the Hubble diagram; however, the actual application of the idea was not that straightforward. It took years to implement the proposition successfully. Most ways to employ quasars for cosmology now require an advanced understanding of their structure, step by step. We briefly review this progress, with unavoidable personal biases, and concentrate on bright unobscured sources. We will mention the problem of the gas flow character close to the innermost stable circular orbit near the black hole, as discussed five decades ago. This problem later led to the development of the slim disk scenario and is recently revived in the context of Magnetically Arrested Disks (MAD) and Standard and Normal Evolution (SANE) models. We also discuss the hot or warm corona issue, which is still under debate and complicates the analysis of X-ray reflection. We present the scenario of the formation of the low ionization part of the Broad Line Region as a failed wind powered by radiation pressure acting on dust (Failed Radiatively Driven Dusty Outflow – FRADO). Next, we examine the cosmological constraints currently achievable with quasars, primarily concentrating on light echo methods (continuum time delays and spectral-line time delays to the continuum) that are (or should be) incorporating the progress mentioned above. Finally, we briefly discuss prospects in this lively subject area.

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Wavelength-resolved reverberation mapping of quasar CTS C30.10: Dissecting Mg II and Fe II emission regions

Cited by 12 publications

References 114 publications

A Broad-line Quasar with Unexplained Extreme Velocity Offsets: Post-shock Outflow?

A Broad-line Quasar with Unexplained Extreme Velocity Offsets: Post-shock Outflow?

UV FeII emission model of HE 0413−4031 and its relation to broad-line time delays

Accretion disks, quasars and cosmology: meandering towards understanding

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Wavelength-resolved reverberation mapping of quasar CTS C30.10: Dissecting Mg II and Fe II emission regions

Cited by 12 publications

References 114 publications

A Broad-line Quasar with Unexplained Extreme Velocity Offsets: Post-shock Outflow?

A Broad-line Quasar with Unexplained Extreme Velocity Offsets: Post-shock Outflow?

UV FeII emission model of HE 0413−4031 and its relation to broad-line time delays

Accretion disks, quasars and cosmology: meandering towards understanding

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Resources

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Wavelength-resolved reverberation mapping of quasar CTS C30.10: Dissecting Mg II and Fe II emission regions