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Shivangi Pandey, Suvendu Rakshit, Priyanka Jalan & Krishan Chand

Spectroscopic and Photometric Study of the Low-luminous AGN NGC 4395

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)
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Abstract

The study of intermediate mass black holes (IMBHs) and estimating the black hole mass could potentially elucidate the origin of supermassive black hole (SMBH) seeds present at high redshifts and how they co-evolve with their host galaxy. The difficulty in detecting these IMBHs and the requirement of high spatial resolution to measure BHs mass makes this task challenging. In this work, we have performed photometric and spectroscopic analyses of an extremely low luminosity Seyfert 1 galaxy NGC4395. Our observations revealed strong emission lines in the spectra, and we observed a fractional variability in the V-band of 12%. Utilizing the broad-line region (BLR) size-luminosity relation for active galactic nuclei (AGNs), we estimated the size of the BLR to be 74±14 light minutes, based on a continuum luminosity of 1038 erg s−1 at 5100 Å. Additionally, the gas clouds are found to be revolving with a velocity dispersion of 384 km s−1 around the central engine, leading to a black hole mass estimation of ∼3.87−1.1+1.1 ×105 M.

Keywords : active galaxies, NGC4395, intermediate-mass black holes, spectroscopy

To cite this article

Shivangi Pandey, Suvendu Rakshit, Priyanka Jalan & Krishan Chand, «Spectroscopic and Photometric Study of the Low-luminous AGN NGC 4395», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 797-810 URL : https://popups.uliege.be/0037-9565/index.php?id=11883.

About: Shivangi Pandey

Aryabhatta Research Institute of Observational Sciences, Nainital–263001, Uttarakhand, India. Corresponding author: Shivangipandey@aries.res.in

About: Suvendu Rakshit

Aryabhatta Research Institute of Observational Sciences, Nainital–263001, Uttarakhand, India

About: Priyanka Jalan

Aryabhatta Research Institute of Observational Sciences, Nainital–263001, Uttarakhand, India and Center for Theoretical Physics of the Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland

About: Krishan Chand

Aryabhatta Research Institute of Observational Sciences, Nainital–263001, Uttarakhand, India