دورية أكاديمية
Host galaxy magnitude of OJ 287 from its colours at minimum light.
العنوان: | Host galaxy magnitude of OJ 287 from its colours at minimum light. |
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المؤلفون: | Valtonen, Mauri J, Dey, Lankeswar, Zola, S, Ciprini, S, Kidger, M, Pursimo, T, Gopakumar, A, Matsumoto, K, Sadakane, K, Caton, D B, Nilsson, K, Komossa, S, Bagaglia, M, Baransky, A, Boumis, P, Boyd, D, Castro-Tirado, A J, Debski, B, Drozdz, M, Escartin Pérez, A |
المصدر: | Monthly Notices of the Royal Astronomical Society; Aug2022, Vol. 514 Issue 2, p3017-3023, 7p |
مصطلحات موضوعية: | GALACTIC magnitudes, ACTIVE galactic nuclei, GALACTIC bulges, ACTIVE galaxies, COLOR |
مستخلص: | OJ 287 is a BL Lacertae type quasar in which the active galactic nucleus (AGN) outshines the host galaxy by an order of magnitude. The only exception to this may be at minimum light when the AGN activity is so low that the host galaxy may make quite a considerable contribution to the photometric intensity of the source. Such a dip or a fade in the intensity of OJ 287 occurred in 2017 November, when its brightness was about 1.75 mag lower than the recent mean level. We compare the observations of this fade with similar fades in OJ 287 observed earlier in 1989, 1999, and 2010. It appears that there is a relatively strong reddening of the B − V colours of OJ 287 when its V -band brightness drops below magnitude 17. Similar changes are also seen in V − R , V − I , and R − I colours during these deep fades. These data support the conclusion that the total magnitude of the host galaxy is V = 18.0 ± 0.3, corresponding to M |
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قاعدة البيانات: | Complementary Index |
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