![](/images/graphics-bg.png)
Long-Term Optical and Spectral Variability of FSRQ 3C454.3
Joint Authors
Yuan, Yu-Hai
Chen, Ze-Xuan
He, Yong-Xuan
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-12-02
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
3C454.3 is a widely studied and monitored flat spectrum radio quasar.
We use the observations from the Small and Moderate Aperture Research Telescope System (SMARTS) to analyze the long-term optical and spectral variabilities of 3C454.3 at B, V, R, J, and K (BVRJK) bands.
Based on the relation: Fν∝ν-α, we calculate the multiband spectral indices (α) and analyze the relations between α and Fν, where Fν is the flux density at ν band (ν=B, V, R, J, K).
Main results are as follows.
(1) The largest variations at BVRJK bands are ΔB = 3.37±0.08 mag, with the timescale ΔTB≈ 1015 days, at B band; ΔV = 3.31±0.07 mag, with the timescale ΔTV≈ 1014 days, at V band; ΔR = 3.62±0.12 mag, with the timescale ΔTR≈ 679 days, at R band; ΔJ = 4.08±0.01 mag, with the timescale ΔTJ≈ 763 days, at J band; and ΔK = 5.03±0.03 mag, with the timescale ΔTK≈ 2715 days, at K band.
(2) We analyze the long-term BVRJK lightcurves and obtain the quasiperiodicities: P1=86.92±2.21 days, P2=204±8.1 days, and P3=1.24±0.19 years.
(3) Multiband lightcurves show time delays: τVB = 0.15±0.12 days, τRB = 0.37±0.28 days, τJB = 0.58±0.40 days, and τKB = 1.02±0.47 days.
(4) The relations between α and Fν show strong correlations, which are typical RWB behaviors; when the source turns to be brighter, the spectral indices turn to be redder.
American Psychological Association (APA)
Yuan, Yu-Hai& Chen, Ze-Xuan& He, Yong-Xuan. 2018. Long-Term Optical and Spectral Variability of FSRQ 3C454.3. Advances in Astronomy،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1114218
Modern Language Association (MLA)
Yuan, Yu-Hai…[et al.]. Long-Term Optical and Spectral Variability of FSRQ 3C454.3. Advances in Astronomy No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1114218
American Medical Association (AMA)
Yuan, Yu-Hai& Chen, Ze-Xuan& He, Yong-Xuan. Long-Term Optical and Spectral Variability of FSRQ 3C454.3. Advances in Astronomy. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1114218
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1114218