Our Search for an H-R Diagram of Quasars
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2008
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| _version_ | 1876451919571976192 |
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| author | Sebastian Zamfir |
| author_facet | Sebastian Zamfir |
| contents | Our Search for an H-R Diagram of Quasars Sebastian Zamfir Jack W. Sulentic Paola Marziani Deborah Dultzin Física, Astronomía y Matemáticas Galaxies: active quasars: general quasars: emission lines The 4D Eigenvector 1 parameter space was introduced seven years ago as an attempt at multiwavelengthspectroscopic representation of quasars. It appears to be the most effective diagnostic space for unifying the diversity of broad line AGN. This progress report shows that the diagnostic power of 4DE1 is confirmed using optical spectra from the SDSS, UV spectra from HST and X-ray spectra from XMM-Newton. Our introduction of the population A-B concept continues to provide useful insights into quasar diversity. Largely radio-quiet, high accreting, low BH mass Population A sources (FWHM Hβ ≤ 4000 km sֿ¹) show strong FeII emission, a soft X-ray excess and a CIV profile blueshift. Low accreting large BH mass Population B quasars (FWHM Hβ > 4000 km sֿ¹) include most radio-loud AGN and show weak FeII emission and little evidence for a softX-ray excess or a CIV blueshift. 2008 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57103221 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.32 |
| format | Artículo científico |
| id | redalyc_57103221 |
| institution | Redalyc |
| language | en |
| publishDate | 2008 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Our Search for an H-R Diagram of Quasars Sebastian Zamfir Física, Astronomía y Matemáticas Galaxies: active quasars: general quasars: emission lines Our Search for an H-R Diagram of Quasars Sebastian Zamfir Jack W. Sulentic Paola Marziani Deborah Dultzin Física, Astronomía y Matemáticas Galaxies: active quasars: general quasars: emission lines The 4D Eigenvector 1 parameter space was introduced seven years ago as an attempt at multiwavelengthspectroscopic representation of quasars. It appears to be the most effective diagnostic space for unifying the diversity of broad line AGN. This progress report shows that the diagnostic power of 4DE1 is confirmed using optical spectra from the SDSS, UV spectra from HST and X-ray spectra from XMM-Newton. Our introduction of the population A-B concept continues to provide useful insights into quasar diversity. Largely radio-quiet, high accreting, low BH mass Population A sources (FWHM Hβ ≤ 4000 km sֿ¹) show strong FeII emission, a soft X-ray excess and a CIV profile blueshift. Low accreting large BH mass Population B quasars (FWHM Hβ > 4000 km sֿ¹) include most radio-loud AGN and show weak FeII emission and little evidence for a softX-ray excess or a CIV blueshift. 2008 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57103221 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.32 |
| title | Our Search for an H-R Diagram of Quasars |
| topic | Física, Astronomía y Matemáticas Galaxies: active quasars: general quasars: emission lines |
| url | https://www.redalyc.org/articulo.oa?id=57103221 |