Academic Journal
Reverberation mapping of two luminous quasars:the broad-line region structure and black hole mass
| Τίτλος: | Reverberation mapping of two luminous quasars:the broad-line region structure and black hole mass |
|---|---|
| Συγγραφείς: | Li, SS, Yang, S, Yang, ZX, Chen, YJ, Songsheng, YY, Liu, HZ, Du, P, Luo, B, Yu, Z, Hu, C, Jiang, BW, Bao, DW, Guo, WJ, Zhang, ZX, Li, YR, Xiao, M, Lu, KX, Ho, LC, Bai, JM, Bian, WH, Aceituno, J, Minezaki, T, Horne, K, Kokubo, M, Wang, JM |
| Πηγή: | Li , SS , Yang , S , Yang , ZX , Chen , YJ , Songsheng , YY , Liu , HZ , Du , P , Luo , B , Yu , Z , Hu , C , Jiang , BW , Bao , DW , Guo , WJ , Zhang , ZX , Li , YR , Xiao , M , Lu , KX , Ho , LC , Bai , JM , Bian , WH , Aceituno , J , Minezaki , T , Horne , K , Kokubo , M & Wang , JM .... |
| Έτος έκδοσης: | 2021 |
| Θεματικοί όροι: | Supermassive black holes, Quasars, Reverberation mapping |
| Περιγραφή: | We report the results of a multiyear spectroscopic and photometric monitoring campaign of two luminous quasars, PG 0923+201 and PG 1001+291, both located at the high-luminosity end of the broad-line region (BLR) size-luminosity relation with optical luminosities above 10(45) erg s(-1). PG 0923+201 is monitored for the first time, while PG 1001+291 was previously monitored but our campaign has a much longer temporal baseline. We detect time lags of variations of the broad H beta, H gamma, and Fe ii lines with respect to those of the 5100 angstrom continuum. The velocity-resolved delay map of H beta in PG 0923+201 indicates a complicated structure with a mix of Keplerian disk-like motion and outflow, and the map of H beta in PG 1001+291 shows a signature of Keplerian disk-like motion. Assuming a virial factor of f (BLR) = 1 and FWHM line widths, we measure the black hole mass to be 118(-16)(+11)x10(7)M(circle dot) for PG 0923+201 and 3.33(-0.54)(+0.62) x 10(7)M(circle dot) for PG 1001+291. Their respective accretion rates are estimated to be 0.21(-0.07)(+0.06) x L(Edd)c(-2) and 679(-227)(+259) x L-Edd c(-2), indicating that PG 0923+201 is a sub-Eddington accretor and PG 1001+291 is a super-Eddington accretor. While the H beta time lag of PG 0923+201 agrees with the size-luminosity relation, the time lag of PG 1001+291 shows a significant deviation, confirming that in high-luminosity active galactic nuclei (AGNs), the BLR size depends on both luminosity and Eddington ratio. Black hole mass estimates from single-AGN spectra will be overestimated at high luminosities and redshifts if this effect is not taken into account. |
| Τύπος εγγράφου: | article in journal/newspaper |
| Περιγραφή αρχείου: | application/pdf |
| Γλώσσα: | English |
| DOI: | 10.3847/1538-4357/ac116e |
| Διαθεσιμότητα: | https://research-portal.st-andrews.ac.uk/en/publications/97f4b1bb-9ad6-4eb7-b48f-579032915d53 https://doi.org/10.3847/1538-4357/ac116e https://research-repository.st-andrews.ac.uk/bitstream/10023/26144/1/Li_2021_Reverbration_mapping_of_two_ApJ_AAM.pdf https://arxiv.org/abs/2106.05655 |
| Rights: | info:eu-repo/semantics/openAccess |
| Αριθμός Καταχώρησης: | edsbas.5A663AF6 |
| Βάση Δεδομένων: | BASE |
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