Mon. Not. R. Astron. Soc., 409, L114-L118 (2010/November-3)
Optical/IR counterpart to the resolved X-ray jet source CXO J172337.5-373442 and its distance.
MOOKERJEA B., PARISI P., BHATTACHARYYA S., MASETTI N., KRUHLER T. and GREINER J.
Abstract (from CDS):
We present results of observations in the optical to mid-infrared wavelengths of the X-ray source CXO J172337.5-373442, which was serendipitously discovered in the Chandra images and was found to have a fully resolved X-ray jet. The observations include a combination of photometry and spectroscopy in the optical using ground-based telescopes and mid-infrared photometry using Spitzer. We detect the optical/IR counterpart of CXO J172337.5-373442 and identify it to be a G9 V star located at a distance of 334±60 pc. Comparable values of the hydrogen column densities determined independently from the optical/IR observations and X-ray observations indicate that the optical source is associated with the X-ray source. Since the X-ray luminosity cannot be explained in terms of emission from a single G9 V star, it is likely that CXO J172337.5-373442 is an accreting compact object in a binary system. Thus, CXO J172337.5-373442 is the nearest known resolved X-ray jet from a binary system, which is not a symbiotic star. Based on the existing X-ray data, the nature of the compact object cannot be confirmed. However, the low luminosity of the X-ray point source, 7.1x1030L☉, combined with estimates of the age of the jet and a lack of detection of bright outburst, suggests that the X-ray jet was launched during extreme quiescence of the object. The measured low X-ray luminosity of the jet suggests the likelihood of such jets being more ubiquitous than our current understanding.
© 2010 The Authors. Journal compilation © 2010 RAS
techniques: photometric - techniques: spectroscopic - infrared: stars - X-rays: binaries - X-rays: individual: CXO J172337.5-373442
In introd. RH Cygni is a misprint for CH Cygni
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