Hints on the Broad Line Region Structure of Quasars at High and Low Luminosities
Quasars show a considerable spectroscopic diversity. However, the variety of quasar spectra at low redshifts is non-random: a principal component analysis applied to large samples customarily identifies two main eigenvectors. In this contribution we show that the range of quasar optical spectral pro...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2011-09-01
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| Series: | Open Astronomy |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/astro-2017-0322 |
| _version_ | 1818578525026779136 |
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| author | Marziani Paola Sulentic Jack W. Zamfir Sebastian Negrete C. A. Dultzin Deborah |
| author_facet | Marziani Paola Sulentic Jack W. Zamfir Sebastian Negrete C. A. Dultzin Deborah |
| author_sort | Marziani Paola |
| collection | DOAJ |
| description | Quasars show a considerable spectroscopic diversity. However, the variety of quasar spectra at low redshifts is non-random: a principal component analysis applied to large samples customarily identifies two main eigenvectors. In this contribution we show that the range of quasar optical spectral properties observed at low-z and associated with the first eigenvector is preserved up to z ≈ 2 in a sample of high luminosity quasars. We also describe two major luminosity effects. |
| first_indexed | 2024-12-16T06:47:11Z |
| format | Article |
| id | doaj.art-14f2cd5a9a8449e0b5b3d265686484a2 |
| institution | Directory Open Access Journal |
| issn | 2543-6376 |
| language | English |
| last_indexed | 2024-12-16T06:47:11Z |
| publishDate | 2011-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Astronomy |
| spelling | doaj.art-14f2cd5a9a8449e0b5b3d265686484a22022-12-21T22:40:31ZengDe GruyterOpen Astronomy2543-63762011-09-0120347247510.1515/astro-2017-0322astro-2017-0322Hints on the Broad Line Region Structure of Quasars at High and Low LuminositiesMarziani Paola0Sulentic Jack W.1Zamfir Sebastian2Negrete C. A.3Dultzin Deborah4INAF, Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, Padova, I-35122, ItalyIAA-CSIC, Glorieta de Astronomia, 18008 Granada, SpainDept. of Physics & Astronomy, University of Wisconsin, 1848 Maria Dr., Stevens Point, WI 54481-1957, United States of AmericaInstituto de Astronomía UNAM, Ciudad Universitaria, Apt. Postal 70-264, México, DF, MexicoInstituto de Astronomía UNAM, Ciudad Universitaria, Apt. Postal 70-264, México, DF, MexicoQuasars show a considerable spectroscopic diversity. However, the variety of quasar spectra at low redshifts is non-random: a principal component analysis applied to large samples customarily identifies two main eigenvectors. In this contribution we show that the range of quasar optical spectral properties observed at low-z and associated with the first eigenvector is preserved up to z ≈ 2 in a sample of high luminosity quasars. We also describe two major luminosity effects.https://doi.org/10.1515/astro-2017-0322quasarsgeneral quasarsemission lines |
| spellingShingle | Marziani Paola Sulentic Jack W. Zamfir Sebastian Negrete C. A. Dultzin Deborah Hints on the Broad Line Region Structure of Quasars at High and Low Luminosities Open Astronomy quasars general quasars emission lines |
| title | Hints on the Broad Line Region Structure of Quasars at High and Low Luminosities |
| title_full | Hints on the Broad Line Region Structure of Quasars at High and Low Luminosities |
| title_fullStr | Hints on the Broad Line Region Structure of Quasars at High and Low Luminosities |
| title_full_unstemmed | Hints on the Broad Line Region Structure of Quasars at High and Low Luminosities |
| title_short | Hints on the Broad Line Region Structure of Quasars at High and Low Luminosities |
| title_sort | hints on the broad line region structure of quasars at high and low luminosities |
| topic | quasars general quasars emission lines |
| url | https://doi.org/10.1515/astro-2017-0322 |
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