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http://hdl.handle.net/2248/6864
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DC Field | Value | Language |
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dc.contributor.author | Rakshit, S | - |
dc.contributor.author | Stalin, C. S | - |
dc.date.accessioned | 2020-11-11T01:34:10Z | - |
dc.date.available | 2020-11-11T01:34:10Z | - |
dc.date.issued | 2017-05 | - |
dc.identifier.citation | The Astrophysical Journal, Vol. 842, No. 2, 96 | en_US |
dc.identifier.issn | 0004-637X | - |
dc.identifier.uri | http://prints.iiap.res.in/handle/2248/6864 | - |
dc.description | Restricted Access https://doi.org/10.3847/1538-4357/aa72f4 © The American Astronomical Society | en_US |
dc.description.abstract | We studied the optical variability ( OV ) of a large sample of narrow-line Seyfert 1 ( NLSy1 ) and broad-line Seyfert 1 ( BLSy1 ) galaxies with z < 0.8 to investigate any differences in their OV properties. Using archival optical V -band light curves from the Catalina Real Time Transient Survey that span 5 – 9 years and modeling them using damped random walk, we estimated the amplitude of variability. We found that NLSy1 galaxies as a class show lower amplitude of variability than their broad-line counterparts. In the sample of both NLSy1 and BLSy1 galaxies, radio-loud sources are found to have higher variability amplitude than radio-quiet sources. Considering only sources that are detected in the X-ray band, NLSy1 galaxies are less optically variable than BLSy1 galaxies. The amplitude of variability in the sample of both NLSy1 and BLSy1 galaxies is found to be anti-correlated with Fe II strength but correlated with the width of the H β line. The well-known anti-correlation of variability – luminosity and the variability – Eddington ratio is present in our data. Among the radio-loud sample, variability amplitude is found to be correlated with radio-loudness and radio-power, suggesting that jets also play an important role in the OV in radio-loud objects, in addition to the Eddington ratio, which is the main driving factor of OV in radio-quiet sources. | en_US |
dc.language.iso | en | en_US |
dc.publisher | IOP Publishing | en_US |
dc.subject | Galaxies: active | en_US |
dc.subject | Galaxies: Seyfert | en_US |
dc.subject | Techniques: photometric | en_US |
dc.title | Optical variability of narrow-line and broad-line Seyfert 1 galaxies | en_US |
dc.type | Article | en_US |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Optical Variability of Narrow-line and Broad-line Seyfert 1 Galaxies.pdf | 1.54 MB | Adobe PDF | View/Open |
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