2004A&A...425.1061G


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.26CEST12:53:39

2004A&A...425.1061G - Astronomy and Astrophysics, volume 425, 1061-1068 (2004/10-3)

Long term variability of Cygnus X-1. III. Radio-X-ray correlations.

GLEISSNER T., WILMS J., POOLEY G.G., NOWAK M.A., POTTSCHMIDT K., MARKOFF S., HEINZ S., KLEIN-WOLT M., FENDER R.P. and STAUBERT R.

Abstract (from CDS):

Long time scale radio-X-ray correlations in black holes during the hard state have been found in many sources and there seems to emerge a universal underlying relationship which quantitatively describes this behavior. Although it would appear only natural to detect short term emission patterns in the X-ray and - with a certain time lag - in the radio, there has been little evidence for this up to now. The most prominent source for radio-X-ray correlations on short time scales (minutes) so far remains GRS 1915+105 where a single mass ejection could be detected successively in X-ray, IR, and radio wavebands. We analyze a database of more than 4 years of simultaneous radio-X-ray data for Cygnus X-1 from the Ryle Telescope and RXTE PCA/HEXTE. We confirm the existence of a radio-X-ray correlation on long time scales, especially at hard energies. We show that apparent correlations on short time scales in the lightcurves of Cygnus X-1 are most likely the coincidental outcome of white noise statistics. Interpreting this result as a breakdown of radio-X-ray correlations on shorter time scales, this sets a limit to the speed of the jet.

Abstract Copyright:

Journal keyword(s): black hole physics - stars: individual: Cyg X-1 - stars: individual: GRS 1915+105 - X-rays: binaries - X-rays: general

Status at CDS:  

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1749 0
2 Granat 1915+105 LXB 19 15 11.54938 +10 56 44.7585           ~ 2271 0
3 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3904 0

    Equat.    Gal    SGal    Ecl

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2020.05.26-12:53:39

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