A Systematic Analysis of Stellar Populations in the Host Galaxies of SDSS Type I QSOs

Jin, Jia; Zhu, Yongchun; Meng, Xia; Lei, Fulin; Wu, Hong

doi:10.3847/1538-4357/aad4f7

Cited by 6 publications

(5 citation statements)

References 96 publications

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“…In a word, this work shows that as the merging process advanced from PM-, M-, LM-to E-type, the objects tend to present higher L IR , more concentrated starformation and warmer IR-color. All these properties support the evolutionary sequence in the (U-)LIRGs of many former works (Sanders et al 1988;Barnes & Hernquist 1992;Bryant & Scoville 1999;Hopkins et al 2008;Jin et al 2018).…”

Section: Merging Sequencesupporting

confidence: 74%

“…And the ULIRGs are associated with the interaction (Zou et al 1991;Sanders et al 1988;Wu et al 1998a,b) as well as active galaxy nuclear (AGN) activities (Wu et al 1998a,b). Theoretical and observational works support an evolution scenario where two gas-rich spiral galaxies merge first and drive material from galaxies disk toward the merger center, triggering star-formation activity before dust-enshrouded AGN in the circumnuclear region (Sanders et al 1988;Barnes & Hernquist 1992;Hopkins et al 2008;Jin et al 2018).…”

Section: Introductionmentioning

confidence: 93%

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An $Hα$ Imaging Survey of the all (Ultra-)Luminous Infrared Galaxies at $Dec. \ge -30^{\circ}$ in the GOALS Sample

Jin,

Zhu,

et al. 2019

Preprint

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This paper presents the result of Hα imaging for luminous infrared galaxies (LIRGs) and ultraluminous infrared galaxies (ULIRGs). It is a complete subsample of Great Observatories All-sky LIRG Survery (GOALS) with Dec. ≥ −30 • , and consists 148 galaxies with log(L IR /L ) ≥ 11.0. All the Hα images were carried out using the 2.16-m telescope at the Xinglong Station of the National Astronomy Observatories, Chinese Academy of Sciences (NAOC), during the year from 2006 to 2009. We obtained pure Hα luminosity for each galaxy and corrected the luminosity for [N II] emission, filter transmission and extinction. We also classified these galaxies based on their morphology and interaction. We found that the distribution of star-forming regions in these galaxies is related to this classification. As the merging process advanced, these galaxies tend to have a more compact distribution of star-forming region, higher L IR and warmer IR-color (f 60 /f 100 ). These results imply that the degree of dynamical disturbance plays an important role in determining the distribution of star-forming region.

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Section: Merging Sequencesupporting

confidence: 74%

Section: Introductionmentioning

confidence: 93%

An $Hα$ Imaging Survey of the all (Ultra-)Luminous Infrared Galaxies at $Dec. \ge -30^{\circ}$ in the GOALS Sample

Jin,

Zhu,

et al. 2019

Preprint

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“…We compare our results with those reported by Cid Fernandes et al (2004) and Jin et al (2018) for other types of AGN host galaxies. The methods they used also follow a description of stellar populations plus a powerlaw component, similar to us.…”

Section: Statistics Of Stellar Populations In Cl-agns Hostsupporting

confidence: 52%

“…The spectra were observed by the 1.5m ESO telescope at La Silla (Chile) with a wavelength range from 3470 to 5450 Å and a spatial sampling of 0.83 per pixel. In Jin et al (2018), there are in total 82 Type 1 QSOs with SDSS spectra. Figure 11 and Figure 12 (the same result as Figure 11, but in the form of histograms) summarize the results of comparisons.…”

Section: Statistics Of Stellar Populations In Cl-agns Hostmentioning

confidence: 99%

A Systematic Analysis of Stellar Populations in the Host Galaxies of Changing-look AGNs

Jin,

Wu,

Feng

2021

Preprint

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Changing-look" active galactic nuclei (CL-AGNs) are a newly-discovered class of AGNs that show the appearance (or disappearance) of broad emission lines within a short time scale (months to years) and are often associated with the dramatic change of their continuum emissions. They provide us an unprecedented chance to directly investigate the host galaxy properties with minimal contamination from the luminous central engine during the "turn-off" state, which is difficult for normal luminous AGNs. In this work, for the first time, we systematically characterize the stellar populations and star formation histories (SFHs) of host galaxies for 26 turn-off CL-AGNs using the stellar population synthesis code STARLIGHT. We find that the stellar populations of CL-AGNs are similar to that of normal AGNs, excepts that the intermediate stellar populations contribute more fraction. We estimate their stellar velocity dispersions (σ ) and black hole masses (M BH,vir ) and find that CL-AGNs also follow the overall M BH − σ relationship. We also confirm the previous claim that CL-AGNs tend to be biased towards lower Eddington ratio, and their extreme variabilities are more likely due to the intrinsic changes of accretion rates. In addition, CL-AGNs with recent star formations (SF) tend to have higher Eddington ratio. Compared with previous studies, our analysis suggests that there may be a correlation between the CL-AGN host galaxy properties and their CL phenomena.

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“…In contrast, some other works show that AGNs may also compress gas, hence triggering star formation (Silk & Norman 2009;Gaibler et al 2012;Ishibashi & Fabian 2012;Kalfountzou et al 2012;Nayakshin & Zubovas 2012;Silk 2013;Kalfountzou et al 2014;Querejeta et al 2016;Maiolino et al 2017;Schutte & Reines 2022). To explore the possible connection between AGNs and host galaxies, therefore, it is important to study the stellar populations and SFHs of AGN-host galaxies (e.g., Cid Fernandes et al 2004;Jin et al 2018;Mallmann et al 2018;Cai et al 2020Cai et al , 2021Jin et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Stellar Populations of AGN-host Dwarf Galaxies Selected with Different Methods

Li,

Zhao 赵,

Bai

2024

Res. Astron. Astrophys.

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In this paper we investigate the stellar populations and star formation histories of 235 active galactic nuclei (AGN)-host dwarf galaxies, consisting of four samples identified separately with different methods (i.e., radio, X-ray, mid-IR and variability), utilizing the synthesis code STARLIGHT and spectra from the Sloan Digital Sky Survey (SDSS) Data Release 8. Our results show that the variability sample is the oldest, while the mid-IR sample is the youngest, for which the luminosity at 4020 Å is dominated (>50%) by the young population (t<108 yr). The light-weighted mean stellar age of the whole sample is in general about 0.7 dex younger than the optical sample studie in Cai et al. We compare the population results between fitting models with and without a power-law (PL) component and find that the neglect of a PL component would lead to an under- and over-estimation by 0.2 and 0.1 dex for the light- and mass-weighted mean stellar age, respectively, for our sample of dwarf galaxies, which has a mean fractional contribution of ∼16% from the AGN. In addition, we obtain further evidence for a possible suppression of star formation in the host galaxy by the central AGN. We also find that there exists an anti-correlation between the extinction-corrected O[III] luminosity and light-weighted mean stellar age, confirming our previous finding that there is a physical connection between AGN and star-forming activies in AGN-host dwarfs.

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A Systematic Analysis of Stellar Populations in the Host Galaxies of SDSS Type I QSOs

Cited by 6 publications

References 96 publications

An $Hα$ Imaging Survey of the all (Ultra-)Luminous Infrared Galaxies at $Dec. \ge -30^{\circ}$ in the GOALS Sample

An $Hα$ Imaging Survey of the all (Ultra-)Luminous Infrared Galaxies at $Dec. \ge -30^{\circ}$ in the GOALS Sample

A Systematic Analysis of Stellar Populations in the Host Galaxies of Changing-look AGNs

Stellar Populations of AGN-host Dwarf Galaxies Selected with Different Methods

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