The quasar main sequence and its potential for cosmology
| Main Authors: | Marziani, Paola, del Olmo, Ascensión, Dultzin, Deborah, de Diego Onsurbe, José Antonio, Negrete, C. Alenka, Sulentic, J. W., Bon, E, Bon, N., Martinez-Aldama, M.-L., Stirpe, G. M., D'Onofrio, M., Perea, J. |
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| Format: | info Proceeding Journal |
| Bahasa: | eng |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3515790 |
Daftar Isi:
- The main sequence offers a method for the systematization of quasar spectral proper- ties. Extreme FeII emitters (or Extreme Population A,xA) are believed to be sources accreting matter at very high rates. Along the quasar main sequence, they are eas- ily identifiable in large spectroscopic surveys over a broad redshift range. The very high accretion rate makes it possible that massive black holes hosted in xA quasars radiate at a stable, extreme luminosity-to-mass ratio. After reviewing basic trends associated with the main sequence, we show that the analysis of of optical and UV xA quasar spectra supports the possibility of identifying a virial broadening esti- mators from low-ionization line widths, and provide evidence of the the conceptual validity of redshift-independent luminosities based on virial broadening for a known luminosity-to-mass ratio.
- Slides on the contributed talk presented on Oct. 8, 2019 at the IAU Symp. No 356 held in Addis Ababa.