M. L. Mart'inez-Aldama, S. Panda, B. Czerny, M. Zajavcek
{"title":"Quasars from LSST as dark energy tracers: first steps","authors":"M. L. Mart'inez-Aldama, S. Panda, B. Czerny, M. Zajavcek","doi":"10.22323/1.362.0010","DOIUrl":null,"url":null,"abstract":"In the near future, new surveys promise a significant increase in the number of quasars (QSO) at large redshifts. This will help to constrain the dark energy models using quasars. The Large Synoptic Survey Telescope (LSST) will cover over 10 million QSO in six photometric bands during its 10-year run. QSO will be monitored and subsequently analyzed using the photometric reverberation mapping (RM) technique. In low-redshift quasars, the combination of reverberation-mapped and spectroscopic results have provided important progress. However, there are still some facts which have to be taken into account for future results. It has been found that super-Eddington sources show time delays shorter than the expected from the well-known Radius-Luminosity ($R\\mathrm{_{H\\beta}}-L_{5100}$) relation. Using a sample of 117 H$\\beta$ reverberation-mapped AGN with $0.02<z<0.9$, we propose a correction by the accretion rate effect recovering the classical $R\\mathrm{_{H\\beta}}-L_{5100}$ relation. We determined the cosmological constants, which are in agreement with $\\Lambda$-Cold Dark Matter model within 2$\\sigma$ confidence level, which is still not suitable for testing possible departures from the standard model. Upcoming LSST data will decrease the uncertainties in the dark energy determination using reverberation-mapped sources, particularly at high redshifts. We show the first steps in the modeling of the expected light curves for H$\\beta$ and MgII.","PeriodicalId":265862,"journal":{"name":"Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII — PoS(MULTIF2019)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII — PoS(MULTIF2019)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22323/1.362.0010","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
In the near future, new surveys promise a significant increase in the number of quasars (QSO) at large redshifts. This will help to constrain the dark energy models using quasars. The Large Synoptic Survey Telescope (LSST) will cover over 10 million QSO in six photometric bands during its 10-year run. QSO will be monitored and subsequently analyzed using the photometric reverberation mapping (RM) technique. In low-redshift quasars, the combination of reverberation-mapped and spectroscopic results have provided important progress. However, there are still some facts which have to be taken into account for future results. It has been found that super-Eddington sources show time delays shorter than the expected from the well-known Radius-Luminosity ($R\mathrm{_{H\beta}}-L_{5100}$) relation. Using a sample of 117 H$\beta$ reverberation-mapped AGN with $0.02
在不久的将来，新的调查承诺在大红移中类星体(QSO)的数量将显著增加。这将有助于约束使用类星体的暗能量模型。大型天气巡天望远镜(LSST)将在其10年的运行中覆盖6个光度波段的超过1000万个QSO。QSO将被监测并随后使用光度混响映射(RM)技术进行分析。在低红移类星体中，混响映射和光谱结果的结合提供了重要的进展。然而，仍有一些事实必须考虑到未来的结果。已经发现，超级爱丁顿源显示的时间延迟比众所周知的半径-光度($R\mathrm{_{H\beta}}-L_{5100}$)关系所预期的要短。利用117 H $\beta$混响映射的AGN样本与$0.02
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