The bizarre spectrum of SS 433

Margon, B.; Ford, H.; Katz, J. I.; Kwitter, K. B.; Ulrich, R. K.; Stone, R. P. S.; Klemola, A. R.

doi:10.1086/182958

Cited by 123 publications

(48 citation statements)

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“…The detection by Margon et al (1979) of large, periodic Doppler drifts in the optical lines of SS433 resulted in the proposition of a kinematic model (Fabian & Rees 1979;Milgrom 1979) consisting of two precessing jets of collimated matter with velocity of 0.26c. High angular radio imaging as a function of time showed the presence of outflowing radio jets and fully confirmed the kinematic model (Spencer 1979;Gilmore & Seaquist 1980;Gilmore et al 1981;Hjellming & Johnston 1981).…”

Section: Jets In Astrophysicsmentioning

confidence: 99%

Sources of Relativistic Jets in the Galaxy

Mirabel

Rodrı́guez²

1999

Annu. Rev. Astron. Astrophys.

848

768

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Black holes of stellar mass and neutron stars in binary systems are first detected as hard X-ray sources using high-energy space telescopes. Relativistic jets in some of these compact sources are found by means of multiwavelength observations with ground-based telescopes. The X-ray emission probes the inner accretion disk and immediate surroundings of the compact object, whereas the synchrotron emission from the jets is observed in the radio and infrared bands, and in the future could be detected at even shorter wavelengths. Black-hole Xray binaries with relativistic jets mimic, on a much smaller scale, many of the phenomena seen in quasars and are thus called microquasars. Because of their proximity, their study opens the way for a better understanding of the relativistic jets seen elsewhere in the Universe. From the observation of two-sided moving jets it is inferred that the ejecta in microquasars move with relativistic speeds similar to those believed to be present in quasars. The simultaneous multiwavelength approach to microquasars reveals in short timescales the close connection between instabilities in the accretion disk seen in the X-rays, and the ejection of relativistic clouds of plasma observed as synchrotron emission at longer wavelengths. Besides contributing to a deeper comprehension of accretion disks and jets, microquasars may serve in the future to determine the distances of jet sources using constraints from special relativity, and the spin of black holes using general relativity.

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Section: Jets In Astrophysicsmentioning

confidence: 99%

Sources of Relativistic Jets in the Galaxy

Mirabel

Rodrı́guez²

1999

Annu. Rev. Astron. Astrophys.

848

768

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“…It is recognized as a supercritically accreting microquasar with a precessing accretion disk and mildly relativistic (v ≈ 0.26 c) jets. Since its discovery in 1978 (Clark & Murdin 1978;Margon et al 1979), this unique X-ray binary has been deeply investigated in optical, radio, and X-rays (see reviews by Margon 1984;Cherepashchuk 1988Cherepashchuk , 2002, for more detail and references).…”

Section: Introductionmentioning

confidence: 99%

INTEGRAL observations of SS433: Results of a coordinated campaign

Черепащук¹,

Sunyaev

Fabrika

et al. 2005

A&A

136

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Abstract. Results of simultaneous INTEGRAL and optical observations of the galactic microquasar SS433 in May 2003and INTEGRAL /RXTE observations in March 2004 are presented. Persistent precessional variability with a maximum to minimum uneclipsed hard X-ray flux ratio of ∼4 is discovered. The 18-60 keV X-ray eclipse is found to be in phase with optical and near infrared eclipses. The orbital eclipse observed by INTEGRAL in May 2003 is at least two times deeper and apparently wider than in the soft X-ray band. The broadband 2-100 keV X-ray spectrum simultaneously detected by RXTE/INTEGRAL in March 2004 can be explained by bremsstrahlung emission from optically thin thermal plasma with kT ∼ 30 keV. Optical spectroscopy with the 6-m SAO BTA telescope confirmed the optical companion to be an A5-A7 supergiant. For the first time, spectorscopic indications of a strong heating effect in the optical star atmosphere are found. The measurements of absorption lines which are presumably formed on the non-illuminated side of the supergiant yield its radial velocity semi-amplitude K v = 132 ± 9 km s −1 . The analysis of the observed hard X-ray light curve and the eclipse duration, combined with the spectroscopically determined optical star radial velocity corrected for the strong heating effect, allows us to model SS433 as a massive X-ray binary. Assuming that the hard X-ray source in SS433 is eclipsed by the donor star that exactly fills its Roche lobe, the masses of the optical and compact components in SS433 are suggested to be M v ≈ 30 M and M x ≈ 9 M , respectively. This provides further evidence that SS433 is a massive binary system with supercritical accretion onto a black hole.

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“…Follow-up observations at the AAT by Clark and Murdin (1978) found a strong emission line spectrum, with several lines they could not identify. Margon (1979) made further observations at the Lick Observatory, finding the unidentified lines to shift in wavelength from night to night. Over the following months it emerged that SS433 is a truly remarkable object, with a pair of jets travelling at relativistic speeds and precessing about a common axis with a 164 day period (Fabian and Rees 1979).…”

Section: Ulxs and Intermediate Mass Black Holesmentioning

confidence: 94%

Searching for Black Holes in Space

Pounds

2013

Space Sci Rev

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Although General Relativity had provided the physical basis of black holes, evidence for their existence had to await the Space Era when X-ray observations first directed the attention of astronomers to the unusual binary stars Cygnus X-1 and A0620-00. Subsequently, a number of faint Ariel 5 and Uhuru X-ray sources, mainly at high Galactic latitude, were found to lie close to bright Seyfert galaxies, suggesting the nuclear activity in AGN might also be driven by accretion in the strong gravity of a black hole. Detection of rapid X-ray variability with EXOSAT later confirmed that the accreting object in AGN was almost certainly a supermassive black hole.

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The bizarre spectrum of SS 433

Cited by 123 publications

References 0 publications

Sources of Relativistic Jets in the Galaxy

Sources of Relativistic Jets in the Galaxy

INTEGRAL observations of SS433: Results of a coordinated campaign

Searching for Black Holes in Space

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