COLOR BEHAVIOR OF BL LACERTAE OBJECT OJ 287 DURING AN OPTICAL OUTBURST

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/141/2/65· OSTI ID:21583227

Yan, Dai; Zonghong, Zhu ^[1]; Jianghua, Wu; Xu, Zhou

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1. Department of Astronomy, Beijing Normal University, Beijing 100875 (China)

This paper studies the color behavior of the BL Lac object OJ 287 during an optical outburst. Upon revisiting the data from the OJ 94 monitoring project, and from an analysis of the data obtained with the 60/90 cm Schmidt Telescope of NAOC, we found a bluer-when-brighter chromatism in this object. The amplitude of variation tends to decrease with frequency. These results are consistent with the shock-in-jet model. We ran some simulations and confirmed that both amplitude difference and time delay between variations at different wavelengths can result in the bluer-when-brighter phenomenon. Our observations confirmed that OJ 287 underwent a double-peaked outburst about 12 years after 1996, which provides further evidence for the binary black hole model in this object.

• OSTI ID: 21583227
• Journal Information: Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 2 Vol. 141; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
AMPLITUDES
BL LACERTAE OBJECTS
BLACK HOLES
COLOR
COSMIC RADIO SOURCES
GALAXIES
MATHEMATICAL MODELS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHOTOMETRY
PHYSICAL PROPERTIES
SIMULATION
TELESCOPES
TIME DELAY