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Title: Probing the central engine and environment of AGN using ARIES 1.3-m and 3.6-m telescopes
Authors: Chand, H
Rakshit, S
Jalan, P
Ojha, V
Srianand, R
Vivek, M
Mishra, S
Omar, A
Kumar, P
Joshi, R
Gopal Krishna
Kumar, R
Keywords: Astronomy;Astrophysics;Spectroscopy;Photometry;Extragalactic;AGN
Issue Date: Apr-2018
Publisher: Bulletin de la Societe Royale des Sciences de Liege
Citation: Bulletin de la Societe Royale des Sciences de Liege, Vol. 87, pp. 291-298
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.
Description: Open Access
ISSN: 0037-9565
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Appears in Collections:IIAP Publications

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