What Really Is the Relativistic Radio-Jet Distance of the Galactic Microquasar GRO J1655-40?

Details What Really Is the Relativistic Radio-Jet Distance of the Galactic Microquasar GRO J1655-40? What Really Is the Relativistic Radio-Jet Distance of the Galactic Microquasar GRO J1655-40?

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..364..597f&link_type=abstract

The Future of Photometric, Spectrophotometric and Polarimetric Standardization, ASP Conference Series, Vol. 364, Proceedings of

Astronomy and Astrophysics

Astronomy

Scientific paper

GRO J1655-40 is a galactic microquasar, i.e. a short-period binary with relativistic radio-jets and where the companion is a black-hole. A little after its discovery in 1994 by BATSE, a distance of 3.2±0.2 kpc has been estimated, and at which the radio jets appeared superluminal. However, recently, tet{Foellmi-etal-2006b} used new VLT-UVES and published photometric data to show that GRO J1655-40 must be closer than 1.7 kpc and that the accuracy of the main distance estimators for this source can be questioned. It is the purpose of this article to show that while the upper limit to the distance is rather firm, the lower limit is not, strengthening the possibility that this microquasar is much closer to us.

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