dc.contributor.author |
Mandal, A. K |
|
dc.contributor.author |
Rakshit, S |
|
dc.contributor.author |
Stalin, C. S |
|
dc.contributor.author |
Wylezalek, D |
|
dc.contributor.author |
Patig, M. K |
|
dc.contributor.author |
Sagar, R |
|
dc.contributor.author |
Mathew, B |
|
dc.contributor.author |
Muneer, S |
|
dc.contributor.author |
Pal, I |
|
dc.date.accessioned |
2021-02-14T06:02:18Z |
|
dc.date.available |
2021-02-14T06:02:18Z |
|
dc.date.issued |
2021-03 |
|
dc.identifier.citation |
Monthly Notices of the Royal Astronomical Society, Vol. 501, No. 3, pp. 3905–3915 |
en_US |
dc.identifier.issn |
1365-2966 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/7625 |
|
dc.description |
Restricted Access © The Royal Astronomical Society https://doi.org/10.1093/mnras/staa3828 |
en_US |
dc.description.abstract |
We report results of the dust reverberation mapping (DRM) on the Seyfert 1 galaxy Z229–15 at z = 0.0273. Quasi-simultaneous
photometric observations for a total of 48 epochs were acquired during the period 2017 July to 2018 December in B, V, J, H and
Ks bands. The calculated spectral index (α) between B and V bands for each epoch was used to correct for the accretion disc (AD)
component present in the infrared light curves. The observed α ranges between −0.99 and 1.03. Using cross-correlation function
analysis we found significant time delays between the optical V and the AD corrected J, H and Ks light curves. The lags in the
rest frame of the source are 12.52+10.00
−9.55 d (between V and J), 15.63+5.05
−5.11 d (between V and H) and 20.36+5.82
−5.68 d (between V and
Ks). Given the large error bars, these lags are consistent with each other. However, considering the lag between V and Ks bands to
represent the inner edge of the dust torus, the torus in Z229–15 lies at a distance of 0.017 pc from the central ionizing continuum.
This is smaller than that expected from the radius luminosity (R−L) relationship known from DRM. Using a constant α = 0.1 to
account for the AD component, as is normally done in DRM, the deduced radius (0.025 pc) lies close to the expected R−L relation.
However, usage of constant α in DRM is disfavoured as the α of the ionizing continuum changes with the flux of the source |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Oxford University Press on behalf of the Royal Astronomical Society |
en_US |
dc.subject |
galaxies: active |
en_US |
dc.subject |
galaxies: individual: Z229-15 |
en_US |
dc.subject |
galaxies: Seyfert |
en_US |
dc.title |
Dust reverberation mapping of Z229–15 |
en_US |
dc.type |
Article |
en_US |