Open AccessQuenched millimetre emission from Cygnus X‐1 in a soft X‐ray state
Author(s) -
Tigelaar S. P.,
Fender R. P.,
Tilanus R. P. J.,
Gallo E.,
Pooley G. G.
Publication year - 2004
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2004.07992.x
Subject(s) - physics , astrophysics , millimeter , black hole (networking) , quenching (fluorescence) , astronomy , optics , fluorescence , computer network , routing protocol , routing (electronic design automation) , computer science , link state routing protocol
We present millimetre wavelength observations of the black hole candidate X‐ray binary Cygnus X‐1 that indicate a suppression, or quenching, of the emission as the source switches to a softer X‐ray state. Combining the data with those for another black hole candidate, XTE J1118+480, we demonstrate that the millimetre emission shows the same coupling to X‐rays as the radio emission, although with a much stronger sensitivity to spectral shape. We therefore confirm the association of the millimetre emission with the jets in low–hard state black hole candidate X‐ray binaries.