On the Role of the Environments and Star Formation for Quasar Activity
We investigate the host galaxy and environment properties of a sample of 400 low z (<0.5) quasars that were imaged in the SDSS Stripe82. We can detect and study the properties of the host galaxy for more than 75% of the data sample. We discover that quasar are mainly hosted in luminous galaxi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2017-11-01
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| Series: | Frontiers in Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/article/10.3389/fspas.2017.00044/full |
| _version_ | 1818939091973046272 |
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| author | Daniela Bettoni Renato Falomo Jari K. Kotilainen Jari K. Kotilainen Kalle Karhunen |
| author_facet | Daniela Bettoni Renato Falomo Jari K. Kotilainen Jari K. Kotilainen Kalle Karhunen |
| author_sort | Daniela Bettoni |
| collection | DOAJ |
| description | We investigate the host galaxy and environment properties of a sample of 400 low z (<0.5) quasars that were imaged in the SDSS Stripe82. We can detect and study the properties of the host galaxy for more than 75% of the data sample. We discover that quasar are mainly hosted in luminous galaxies of absolute magnitude M* − 3 < M(R) < M*1 and that in the quasar environments the galaxy number density is comparable to that of inactive galaxies of similar luminosities. For these quasars we undertake also a study in u,g,r,i, and z SDSS bands and again we discover that the mean colors of the quasar host galaxy it is not very different with respect to the values of the sample of inactive galaxies. For a subsample of low z sources the imaging study is complemented by spectroscopy of quasar hosts and of close companion galaxies. This study suggests that the supply and cause of the nuclear activity depends only weakly on the local environment of quasars. Contrary to past suggestions, for low redshift quasar there is a very modest connection between recent star formation and the nuclear activity. |
| first_indexed | 2024-12-20T06:18:15Z |
| format | Article |
| id | doaj.art-3937b62a440a4e87bdce687edb894497 |
| institution | Directory Open Access Journal |
| issn | 2296-987X |
| language | English |
| last_indexed | 2024-12-20T06:18:15Z |
| publishDate | 2017-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Astronomy and Space Sciences |
| spelling | doaj.art-3937b62a440a4e87bdce687edb8944972022-12-21T19:50:29ZengFrontiers Media S.A.Frontiers in Astronomy and Space Sciences2296-987X2017-11-01410.3389/fspas.2017.00044305286On the Role of the Environments and Star Formation for Quasar ActivityDaniela Bettoni0Renato Falomo1Jari K. Kotilainen2Jari K. Kotilainen3Kalle Karhunen4INAF - Osservatorio Astronomico di Padova, Padua, ItalyINAF - Osservatorio Astronomico di Padova, Padua, ItalyFinnish Centre for Astronomy with ESO (FINCA), University of Turku, Turku, FinlandTuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku, FinlandTuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku, FinlandWe investigate the host galaxy and environment properties of a sample of 400 low z (<0.5) quasars that were imaged in the SDSS Stripe82. We can detect and study the properties of the host galaxy for more than 75% of the data sample. We discover that quasar are mainly hosted in luminous galaxies of absolute magnitude M* − 3 < M(R) < M*1 and that in the quasar environments the galaxy number density is comparable to that of inactive galaxies of similar luminosities. For these quasars we undertake also a study in u,g,r,i, and z SDSS bands and again we discover that the mean colors of the quasar host galaxy it is not very different with respect to the values of the sample of inactive galaxies. For a subsample of low z sources the imaging study is complemented by spectroscopy of quasar hosts and of close companion galaxies. This study suggests that the supply and cause of the nuclear activity depends only weakly on the local environment of quasars. Contrary to past suggestions, for low redshift quasar there is a very modest connection between recent star formation and the nuclear activity.http://journal.frontiersin.org/article/10.3389/fspas.2017.00044/fullgalaxies activegalaxies evolutiongalaxies nucleiquasars generalquasars environment |
| spellingShingle | Daniela Bettoni Renato Falomo Jari K. Kotilainen Jari K. Kotilainen Kalle Karhunen On the Role of the Environments and Star Formation for Quasar Activity Frontiers in Astronomy and Space Sciences galaxies active galaxies evolution galaxies nuclei quasars general quasars environment |
| title | On the Role of the Environments and Star Formation for Quasar Activity |
| title_full | On the Role of the Environments and Star Formation for Quasar Activity |
| title_fullStr | On the Role of the Environments and Star Formation for Quasar Activity |
| title_full_unstemmed | On the Role of the Environments and Star Formation for Quasar Activity |
| title_short | On the Role of the Environments and Star Formation for Quasar Activity |
| title_sort | on the role of the environments and star formation for quasar activity |
| topic | galaxies active galaxies evolution galaxies nuclei quasars general quasars environment |
| url | http://journal.frontiersin.org/article/10.3389/fspas.2017.00044/full |
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