“Hassan Fathivavsari”

Tel: 021-2310 5033
Email:

IPM Positions |
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PostDoctoral Associate, School of Astronomy
(2016 - 2018 ) |
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non IPM Affiliations |
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Visiting researcher, Institut d Astrophysique de Paris (IAP) | ||
Research Interests |
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Observational cosmology - Quasar absorption line systems - Galaxy evolution. | ||
Research Activities |
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Strong damped Ly-alpha absorption (DLA) systems located at the same redshift as their background quasars, can act as a natural coronagraph and block the strong Ly-alpha emission from the quasar broad emission line region. This would then allow us to detect Ly-alpha emission of the quasar host galaxy as a narrow Ly-alpha emission at the bottom of the DLA trough. It is then possible to study the feeding and feedback mechanisms of the AGN by tracing the Ly-alpha emission from the innermost region of the quasar to the outermost region of its halo. | ||
Present Research Project at IPM |
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Using coronagraphic DLAs to reveal quasar host galaxies | ||
Related Papers |
1. | Hassan . Fathivavsari Constraining the Metallicities of Damped Ly[Math Processing Error] Systems Using Extinction Curves Astrophysical Journal 908 (2021), [abstract] Code: IPM/A-2020/36 |
2. | Hassan . Fathivavsari Using Machine Learning to Find Ghostly Damped Lyα Systems in SDSS DR14 Astrophysical Journal 901 (2020), [abstract] Code: IPM/A-2020/21 |
3. | Hassan . Fathivavsari Deep Learning Prediction of Quasars Broad Lyα Emission Line ApJ 898 (2020), [abstract] Code: IPM/A-2020/17 |
4. | Hassan . Fathivavsari Ghostly Damped Lyα Systems: Tracers of Gas Flows in the Close Vicinity of Quasars ? ApJ 888 (2020), [abstract] Code: IPM/A-2019/43 |
5. | P. Noterdaeme, S. Balashev, J.-K. Krogager, R. Srianand, H. Fathivavsari, P. Petitjean and C. Ledoux Proximate Molecular Quasar Absorbers: Excess of damped H2 systems at zabs zQSO in SDSS DR14 Astronomy & Astrophysics 627 (2019), [abstract] Code: IPM/A-2019/48 |
6. | Siwei . Zou, Patrick . Petitjean, Pasquier . Noterdaeme, Cédric . Ledoux, Jens-Kristian . Krogager, Hassan . Fathivavsari, Raghunathan . Srianand and Sebastian . López Near Infrared spectroscopic observations of high redshift C i absorbers Astronomy & Astrophysics 616 (2018), [abstract] Code: IPM/A-2018/41 |
7. | Narges. Jamialahmadi, Thorsten . Ratzka, Olja . Panic, Hassan . Fathivavsari, Roy . Van Boekel, Sebastien . Flement, Thomas . Hening, Walter . Jaffe and Gijs . Mulders Constraining the gap size in the disk around HD 100546 in the mid-infrared Astrophysical Journal 865 (2018), [abstract] Code: IPM/A-2018/09 |
8. | H. Fathivavsari, P. Petitjean, N. Jamialahmadi, H. G Khosroshahi , H. Rahmani, H. Finley, P. Noterdaeme, I. Pâris and R. Srianand Eclipsing damped Lyα systems in the Sloan Digital Sky Survey Data Release 12 MNRAS (2018), [abstract] Code: IPM/A-2018/01 |
9. | H. Fathivavsari, P. Petitjean, S. Zou, P. Noterdaeme, C. Ledoux, T. Krühler and R. Srianand A ghostly damped Ly α system revealed by metal absorption lines MNRAS 466 (2017), [abstract] Code: IPM/A-2017/32 |
10. | N. Jamialahmadi, B. Lopez, Ph. Berio, A. Matter, S. Flament, H. Fathivavsari, T. Ratzka, M. L. Sitko, A. Spang and R. W. Russell On the inner disc structure of MWC480: evidence for asymmetries? MNRAS 473 (2017), [abstract] Code: IPM/A-2017/31 |
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