A Numerical Simulation of the Brightness Variations of OJ 287

Sundelius, B.; Wahde, Mattias; Lehto, H. J.; Valtonen, M. J.

doi:10.1086/304331

Cited by 116 publications

(178 citation statements)

References 8 publications

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“…The causes for these irregular changes are unknown. Such patterns of abrupt changes is very similar to that seen in OJ287, which has long been suspected to host an SMBHB system (e.g., Sundelius et al 1997;Valtonen et al 2008). …”

Section: Properties Of Long-term Variationssupporting

confidence: 74%

Spectroscopic Indication of a Centi-Parsec Supermassive Black Hole Binary in the Galactic Center of Ngc 5548

Wang

et al. 2016

ApJ

111

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As a natural consequence of cosmological hierarchical structure formation, sub-parsec supermassive black hole binaries (SMBHBs) should be common in galaxies but thus far have eluded spectroscopic identification. Based on four decades of optical spectroscopic monitoring, we report that the nucleus of NGC5548, a nearby Seyfert galaxy long suspected to have experienced a major merger about 1 billion yr ago, exhibits long-term variability with a period of ∼14 yr in the optical continuum and broad Hβ emission line. Remarkably, the double-peaked profile of Hβ shows systematic velocity changes with a similar period. These pieces of observations plausibly indicate that an SMBHB resides in the center of NGC5548. The complex, secular variations in the line profiles can be explained by orbital motion of a binary with equal mass and a semimajor axis of ∼22 light-days (corresponding to ∼18 milli-parsec). At a distance of 75Mpc, NGC5548 is one of the nearest sub-parsec SMBHB candidates that offers an ideal laboratory for gravitational wave detection.

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Section: Properties Of Long-term Variationssupporting

confidence: 74%

Spectroscopic Indication of a Centi-Parsec Supermassive Black Hole Binary in the Galactic Center of Ngc 5548

Wang

et al. 2016

ApJ

111

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“…In the binary black hole model of Lehto & Valtonen (1996) and Sundelius et al (1997) there are two main sources of optical outbursts. The first kind arises when the secondary black hole impacts on the accretion disk of the primary, and extracts a hot gas cloud (Ivanov et al 1998).…”

Section: Historical 1900 and 1913 Outbursts From The Point Of View Ofmentioning

confidence: 99%

“…The latter types of events have been used as markers of orbit evolution in binary black hole models and have thus been widely discussed. For example, in the model of Sundelius et al (1997), the 1913 outburst is classified in the category of slow tidally induced outbursts, while Valtonen (2007) regards it as a 1983-category sharp outburst, arising from the impact of the secondary black hole on the accretion disk of the primary black hole (Lehto & Valtonen 1996).…”

Section: Introductionmentioning

confidence: 99%

The historical 1900 and 1913 outbursts of the binary blazar candidate OJ287

Hudec

Bašta

Pihajoki

et al. 2013

A&A

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“…It has been modeled both as a binary black hole (Sundelius et al 1997;Valtonen & Lehto 1997) and as a precessing disk (Katz 1997a). As for other candidates, Hagen-Thorn et al (1997) suggest 15 yr for 3C 120, but on the basis of only 20 yr of data, while Lik et al (1997) rely on nearly 90 yr of brightness measurements in proposing a 23.1 yr period for Mrk 421.…”

Section: Some Galactic Extremamentioning

confidence: 99%

Astrophysics in 1997

Trimble¹,

McFadden²

1998

PUBL ASTRON SOC PAC

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ABSTRACT. Martian marvels, a gamma-ray burster with a redshift, Galileo converses with Ganymede, a record galactic redshift of 4.92, and much else. Fiscal 1997 was definitely an exciting year for astronomers. We have tried hard to hit all the obvious highlights, but also to report more gradual progress on traditional problems of understanding planets, stars, galaxies, and the universe. Though the year was saddened by the loss of many valued colleagues, we nevertheless indulge in occasional soupçons of frivolity.

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A Numerical Simulation of the Brightness Variations of OJ 287

Cited by 116 publications

References 8 publications

Spectroscopic Indication of a Centi-Parsec Supermassive Black Hole Binary in the Galactic Center of Ngc 5548

Spectroscopic Indication of a Centi-Parsec Supermassive Black Hole Binary in the Galactic Center of Ngc 5548

The historical 1900 and 1913 outbursts of the binary blazar candidate OJ287

Astrophysics in 1997

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