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Hum Chand, Suvendu Rakshit, Priyanka Jalan, Vineet Ojha, Raghunathan Srianand, Mariappan Vivek, Sapna Mishra, Amitesh Omar, Parveen Kumar, Ravi Joshi, Gopal-Krishna & Rathna Kumar

Probing the central engine and environment of AGN using ARIES 1.3-m and 3.6-m telescopes

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Mots-clés : AGN, astronomie, astrophysique, extragalactique, photométrie, spectrocopie

Abstract

We discuss three long term observational programmes to probe the central engine and environment of active galactic nuclei (AGN) using the recently installed ARIES 1.3-m and 3.6-m telescopes. The first programme is on the photometric reverberation mapping of low luminosity AGN by mainly using the ARIES 1.3-m telescope. The major impact of this programme other than to estimate the black hole mass will be to extend the broad line region (BLR) radius-luminosity (RBLR-LAGN) relation to the unexplored low luminosity regime, and to constrain the AGN broad line region geometry. The second programme is to use long slit spectroscopy on the ARIES 3.6-m telescope to discover new high redshift quasar pairs with angular separation less than ~ 1-arcmin. Here, the background QSOs sight-line will be used to probe the environment of the foreground QSOs at kpc-Mpc scales. The major impact of this programme will be on the discovery of new pairs which have been missed in the SDSS survey due to fiber collision below 1-arcmin separation, and use them to understand about any excess overdensity around the QSO, any anisotropic emission of QSOs, and/or any episodic activity of QSOs. The third programme is related to spectral variability studies of the C IV broad absorption line (BAL) QSOs, based on low resolution spectroscopy using the ARIES 3.6-m telescope. Here, those most interesting cases will be monitored, where the BAL flow emerges afresh or disappears completely in the C IV trough of BAL QSOs sample as seen in SDSS multi-epoch observations. Continuous monitoring of such a sample will be important for our understanding of the nature and origin of the flow, along with their stability and dynamical evolution.

Keywords : AGN, astronomy, astrophysics, extragalactic, photometry, spectroscopy

Pour citer cet article

Hum Chand, Suvendu Rakshit, Priyanka Jalan, Vineet Ojha, Raghunathan Srianand, Mariappan Vivek, Sapna Mishra, Amitesh Omar, Parveen Kumar, Ravi Joshi, Gopal-Krishna & Rathna Kumar, «Probing the central engine and environment of AGN using ARIES 1.3-m and 3.6-m telescopes», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 87 - Année 2018, Actes de colloques, First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India, 291 - 298 URL : https://popups.uliege.be:443/0037-9565/index.php?id=7727.

A propos de : Hum Chand

Aryabhatta Research Institute of observational sciencES (ARIES ), Nainital 263002, India, hum@aries.res.in

A propos de : Suvendu Rakshit

Indian Institute of Astrophysics II Block, Koramangala, Bangalore 560 034, India

A propos de : Priyanka Jalan

Aryabhatta Research Institute of observational sciencES (ARIES ), Nainital 263002, India

A propos de : Vineet Ojha

Aryabhatta Research Institute of observational sciencES (ARIES ), Nainital 263002, India

A propos de : Raghunathan Srianand

Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Pune 411007, India

A propos de : Mariappan Vivek

Department of Physics and Astronomy, University of Utah, 115 S. 1400 E., UT 84112, US

A propos de : Sapna Mishra

Aryabhatta Research Institute of observational sciencES (ARIES ), Nainital 263002, India

A propos de : Amitesh Omar

Aryabhatta Research Institute of observational sciencES (ARIES ), Nainital 263002, India

A propos de : Parveen Kumar

Aryabhatta Research Institute of observational sciencES (ARIES ), Nainital 263002, India

A propos de : Ravi Joshi

Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Pune 411007, India

A propos de :  Gopal-Krishna

Centre for Excellence in Basic Sciences, University of Mumbai campus (Kalina) 400098, India

A propos de : Rathna Kumar

Aryabhatta Research Institute of observational sciencES (ARIES ), Nainital 263002, India