On the distance of GRO J1655-40

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dc.contributor.authorFoellmi, C.
dc.contributor.authorDepagne, E.
dc.contributor.authorDall, T. H.
dc.contributor.authorMirabel, I. F.
dc.date.accessioned2025-01-21T01:05:54Z
dc.date.available2025-01-21T01:05:54Z
dc.date.issued2006
dc.description.abstractAims. We challenge the accepted distance of 3.2 kpc of GRO J1655-40. We present VLT-UVES spectroscopic observations to estimate the absorption toward the source, and determine a maximum distance of GRO J1655-40.
dc.description.abstractMethods. We show that the accepted value of 3.2 kpc is taken for granted by many authors. We retrieved in the ESO archive UVES spectra taken in April 2004 when GRO J1655-40 was in quiescence to determine the spectral type of the secondary star. For the first time we build a flux-calibrated mean (UVES) spectrum of GRO J1655-40 and compare its observed flux to that of five nearby stars of similar spectral types. We strengthen our results with the traditional pair method, using published photometric data of the comparison stars.
dc.description.abstractResults. We show that the distance of 3.2 kpc is questionable. We determine a spectral type F6IV for the secondary star. We demonstrate in details that the distance of GRO J1655-40 must be smaller than 1.7 kpc.
dc.description.abstractConclusions. The runaway black hole GRO J1655-40 could be associated with the open cluster NGC 6242 which is located at 1.0 +/- 0.1 kpc from the Sun. At D <= 1.7 kpc the jets are not a superluminal, and GRO J1655-40 becomes one of the closest known black holes to the Sun.
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361:20054686
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361:20054686
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96043
dc.identifier.wosidWOS:000240495300029
dc.issue.numero1
dc.language.isoen
dc.pagina.final255
dc.pagina.inicio249
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectstars : binaries : eclipsing
dc.subjectstars : distances
dc.subjectdust, extinction
dc.subjectISM : supernova remnants
dc.subjectstars : individual : GRO J1655-40
dc.titleOn the distance of GRO J1655-40
dc.typeartículo
dc.volumen457
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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