تقرير
What does Civ{\lambda}1549 tell us about the physical driver of the Eigenvector Quasar Sequence?
| العنوان: | What does Civ{\lambda}1549 tell us about the physical driver of the Eigenvector Quasar Sequence? |
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| المؤلفون: | Sulentic, J. W., del Olmo, A., Marziani, P., Martínez-Carballo, M. A., D'Onofrio, M., Dultzin, D., Perea, J., Martínez-Aldama, M. L., Negrete, C. A., Stirpe, G. M., Zamfir, S. |
| سنة النشر: | 2017 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | Broad emission lines in quasars enable us to "resolve" structure and kinematics of the broad line emitting region (BLR) thought to in- volve an accretion disk feeding a supermassive black hole. Interpretation of broad line measures within the 4DE1 formalism simplifies the apparent confusion among such data by contrasting and unifying properties of so-called high and low accreting Population A and B sources. H{\beta} serves as an estimator of black hole mass, Eddington ratio and source rest frame, the latter a valuable input for Civ{\lambda}1549 studies which allow us to isolate the blueshifted wind component. Optical and HST-UV spectra yield H{\beta} and Civ{\lambda}1549 spectra for low-luminosity sources while VLT-ISAAC and FORS and TNG-LRS provide spectra for high Luminosity sources. New high S/N data for Civ in high-luminosity quasars are presented here for comparison with the other previously published data. Comparison of H{\beta} and Civ{\lambda}1549 profile widths/shifts indicates that much of the emission from the two lines arise in regions with different structure and kinematics. Covering a wide range of luminosity and redshift shows evidence for a correlation between Civ{\lambda}1549 blueshift and source Eddington ratio, with a weaker trend with source luminosity (similar amplitude outflows are seen over 4 of the 5 dex luminosity range in our combined samples). At low luminosity (z < 0.7) only Population A sources show evidence for a significant outflow while at high luminosity the outflow signature begins to appear in Population B quasars as well. Comment: 18 pages, 11 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/201630309 |
| URL الوصول: | http://arxiv.org/abs/1708.03187 |
| رقم الأكسشن: | edsarx.1708.03187 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/201630309 |
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