The distances to Galactic low-mass X-ray binaries: consequences for black hole luminosities and kicks

We investigated the reported distances of Galactic black hole (BH) and neutron star low-mass X-ray binaries (LMXBs). Comparing the distances derived for the neutron stars Cyg X-2 and XTE J2123-058 using the observed Eddington limited photospheric radius expansion bursts with the distances derived using the observed radius and effective temperature of the companion star, we find that the latter are smaller by approximately a factor of 1.5-2. The latter method is often employed to determine the distance to BH LMXBs. A possible explanation for this discrepancy is that the stellar absorption lines in fast rotating companion stars are different from those in the slowly rotating template stars as was found before for early-type stars. This could lead to a systematic mis-classification of the spectral type of the companion star, which in turn would yield a systematic error in the distance. Further, we derive a distance of 4.0 +2.0 -1.2 ) kpc for V404 Cyg, using parameters available in the literature. The interstellar extinction seems to have been overestimated for XTE J1550-564 and possibly for two other BH sources (H 1705-25 and GS 2000+25) as well. As a result of this, the distance to XTE J1550-564 may have been underestimated by as much as a factor three. We find that, using the new distances for XTE J1550-564 and V404 Cyg, the maximum outburst luminosity for at least five, but perhaps even seven, of the 15 BH soft X-ray transients exceed the Eddington luminosity for a 10-M ○. BH - showing that these systems would be classified as ultra-luminous X-ray sources had we observed them in other Galaxies. This renders support for the idea that many ultra-luminous X-ray sources are stellar-mass rather than intermediate-mass BHs. We find that the rms-value of the distance to the Galactic plane for BHs is consistent with that of neutron star LMXBs. This suggests that BHs could also receive a kick-velocity during their formation, although this has to be investigated in more detail. We find that the Galactic neutron star and BH l- and b-distributions are consistent with being the same. The neutron star and BH distribution is asymmetric in l with an excess of systems between -30° < l < 0° over systems with 0° < l < 30°.

[1]  J. Casares,et al.  Optical studies of V404 Cyg, the X-Ray transient GS 2023 + 338 – III. The secondary star and accretion disc , 1993 .

[2]  Thomas J. Maccarone,et al.  Do X-ray binary spectral state transition luminosities vary? , 2003, astro-ph/0308036.

[3]  R. Wijnands,et al.  Discovery of Twin Kilohertz Quasi-periodic Oscillations in the High Galactic LatitudeX-Ray Transient XTE J2123–058 , 1999, astro-ph/9901161.

[4]  W. E. Harris,et al.  Photospheric radius expansion X-ray bursts as standard candles , 2002, astro-ph/0212028.

[5]  Michael R. Garcia,et al.  On the Mass of the Black Hole in GS 2000+25 , 1996 .

[6]  C. Kouveliotou,et al.  Discovery of a Kilohertz Quasi-periodic Oscillation in 2S 0918–549 , 2001 .

[7]  Caltech,et al.  VLT spectroscopy of XTE J2123−058 during quiescence: the masses of the two components , 2001, astro-ph/0106525.

[8]  William H. Press,et al.  Numerical recipes in FORTRAN (2nd ed.): the art of scientific computing , 1992 .

[9]  P. A. Charles,et al.  The Halo Black Hole X-Ray Transient XTE J1118+480 , 2001, astro-ph/0104032.

[10]  Erik Kuulkers,et al.  The Mass of the Neutron Star in Cygnus X-2 (V1341 Cygni) , 1997 .

[11]  J. E. Grindlay,et al.  HARD X-RAY EMISSION FROM LOW-MASS X-RAY BINARIES , 2000 .

[12]  T. Shahbaz,et al.  The mass of the black hole in $A0620-00$ , 1994 .

[13]  A. Udalski.  The Optical Gravitational Lensing Experiment: Is Interstellar Extinction toward the Galactic Center Anomalous? , 2002, astro-ph/0210367.

[14]  C. A. Haswell,et al.  The Evolving Accretion Disc in the Black Hole X-ray Transient XTE J1859+226 ⋆ , 2002 .

[15]  E.P.J. van den Heuvel,et al.  A catalogue of low-mass X-ray binaries , 2001 .

[16]  G. Sonneborn,et al.  Some effects of rotation on the spectra of upper-main-sequence stars. , 1977 .

[17]  Roma,et al.  Broadband Observations of the New X-Ray Burster SAX J1747.0–2853 during the 1998 March Outburst , 2000, astro-ph/0009013.

[18]  C. Heiles,et al.  H I, galaxy counts, and reddening: Variation in the gas-to-dust ratio, the extinction at high galactic latitudes, and a new method for determining galactic reddening , 1978 .

[19]  James Liebert,et al.  M dwarf spectra from 0.6 to 1.5 micron - A spectral sequence, model atmosphere fitting, and the temperature scale , 1993 .

[20]  Vassiliki Kalogera,et al.  The Maximum Mass of a Neutron Star , 1996, astro-ph/9608059.

[21]  Diane Roussel-Dupre,et al.  Discovery of a bright X-ray nova, GS 2000+25 , 1989 .

[22]  William H. Press,et al.  Numerical Recipes in FORTRAN - The Art of Scientific Computing, 2nd Edition , 1987 .

[23]  Caltech,et al.  The Optical Light Curves of XTE J2123-058. III. The Mass of the Binary Components and the Structure of the Quiescent Accretion Disk , 2002, astro-ph/0211154.

[24]  E. T. Harlaftis,et al.  The rotational broadening and the mass of the donor star of GRS 1915+105 , 2004 .

[25]  J. Tomsick,et al.  X-Ray Observations of XTE J1550-564 During the Decay of the 2000 Outburst - I. Chandra and RXTE Energy Spectra , 2001, astro-ph/0105394.

[26]  Richard E. Griffiths,et al.  Nova Ophiuchi 1977: an X-Ray Nova. , 1978 .

[27]  R. Panek,et al.  ULTRAVIOLET OBSERVATIONS OF THE TRANSIENT X-RAY SOURCES A0535+26 AND A0620-00. , 1983 .

[28]  R. M. Hjellming,et al.  Episodic ejection of relativistic jets by the X-ray transient GRO J1655 - 40 , 1995, Nature.

[29]  S. Cranmer,et al.  Model atmospheres for rotating B stars , 1991 .

[30]  T. Kii,et al.  A very long X-ray burst with a precursor from XB 1715-321 , 1984 .

[31]  W. Lewin,et al.  UvA-DARE ( Digital Academic Repository ) X-ray bursts at extreme mass accretion rates from GX 17 + 2 , 2002 .

[32]  James M. Cordes,et al.  Pulsar distances and the galactic distribution of free electrons , 1993 .

[33]  L. Bildsten,et al.  Coronal X-Ray Emission from the Stellar Companions to Transiently Accreting Black Holes , 1999, astro-ph/9912304.

[34]  V. Dhawan,et al.  Radio and X-ray observations during the outburst decay of the black hole candidate XTE J1908+094 , 2004, astro-ph/0403578.

[35]  D. Crampton,et al.  GX 339-4 - Black hole or neutron star X-ray binary , 1987 .

[36]  N. E. White,et al.  The Galactic Distribution of Black Hole Candidates in Low-Mass X-Ray Binary Systems , 1996 .

[37]  William H. Press,et al.  Book-Review - Numerical Recipes in Pascal - the Art of Scientific Computing , 1989 .

[38]  Ping Zhao,et al.  Dynamical Evidence for a Black Hole in the Microquasar XTE J1550–564 , 2001, astro-ph/0112101.

[39]  The Distance and Interstellar Sight Line to GX 339–4 , 2004, astro-ph/0402408.

[40]  N. Panagia,et al.  The Hubble Space Telescope observations of X-ray nova Muscae 1991 and its spectral evolution , 1992 .

[41]  Nicholas E. White,et al.  The Galactic Distribution of Low-Mass X-Ray Binaries , 1995 .

[42]  O. Struve,et al.  On the rotation of the stars , 1929 .

[43]  J. Paradijs.  Average properties of X-ray burst sources , 1978, Nature.

[44]  J. Bailey.  The distances of cataclysmic variables , 1981 .

[45]  Ucsd,et al.  Discovery of Millisecond Variability in the Neutron Star X-Ray Transient SAX J1750.8–2900 , 2002, astro-ph/0204409.

[46]  Mitchell C. Begelman,et al.  Super-Eddington Fluxes from Thin Accretion Disks? , 2002, astro-ph/0203030.

[47]  J. Orosz,et al.  Optical Observations of GRO J1655–40 in Quiescence. I. A Precise Mass for the Black Hole Primary , 1996, astro-ph/9610211.

[48]  H. J. van der Woerd,et al.  X-ray spectroscopy of the ultrasoft transient 4U 1543 - 47 , 1989 .

[49]  Bohdan Paczynski,et al.  Evolutionary Processes in Close Binary Systems , 1971 .

[50]  S. Vrtilek,et al.  The Einstein objective grating spectrometer survey of galactic binary X-ray sources , 1991 .

[51]  A. R. King,et al.  The evolutionary status of the black hole candidate V404 Cygni , 1993 .

[52]  Moscow,et al.  Super-Eddington outburst of V4641 Sgr , 2002, astro-ph/0204132.

[53]  R. Sunyaev,et al.  The Milky Way in X-rays for an outside observer , 2001, astro-ph/0109239.

[54]  George H. Herbig,et al.  The Diffuse Interstellar Bands , 1995 .

[55]  L. Bildsten,et al.  Nearly Coherent Oscillations in Type I X-Ray Bursts from KS 1731–260 , 2000, astro-ph/0003229.

[56]  A. Filippenko,et al.  THE MASS RATIO AND THE DISK IMAGE OF THE X-RAY NOVA GS 2000+25 , 1996 .

[57]  E. L. Robinson,et al.  Spectroscopy of $A0620-00$: the mass of the black hole and an image of its accretion disc , 1994 .

[58]  R. Wade,et al.  The Radial Velocity Curve and Peculiar TiO Distribution of the Red Secondary Star in Z Chamaeleontis , 1988 .

[59]  M. Garcia,et al.  The X-Ray Spectra of Black Hole X-Ray Novae in Quiescence as Measured by Chandra , 2001, astro-ph/0111134.

[60]  E.P.J. van den Heuvel,et al.  Black holes in binaries and galactic nuclei , 2001 .

[61]  L. Bildsten,et al.  Rotational Evolution during Type I X-Ray Bursts , 2000, astro-ph/0004347.

[62]  R. P. Kraft,et al.  STUDIES OF STELLAR ROTATION. V. THE DEPENDENCE OF ROTATION ON AGE AMONG SOLAR-TYPE STARS. , 1967 .

[63]  D. Steeghs,et al.  A Doppler Map and Mass-ratio Constraint for the Black-Hole X-ray Nova Ophiuchi 1977 , 1997, astro-ph/9707242.

[64]  D. Schlegel,et al.  Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds , 1998 .

[65]  E. Fomalont,et al.  High-Resolution Parallax Measurements of Scorpius X-1 , 1999 .

[66]  William H. Press,et al.  Numerical recipes in Fortran 77 : the art of scientificcomputing. , 1992 .

[67]  Tim Naylor,et al.  The mass of the black hole in V404 Cygni , 1994 .

[68]  C. A. Haswell,et al.  The X-Ray Transient XTE J1118+480: Multiwavelength Observations of a Low-State Minioutburst , 2000 .

[69]  L. Cominsky,et al.  Repeatable, multiple-peaked structure in Type I X-ray bursts , 1980 .

[70]  J. Zand,et al.  X-Ray Bursts from the Accreting Millisecond Pulsar XTE J1814–338 , 2003, astro-ph/0308353.

[71]  L. Natalucci,et al.  BeppoSAX Wide Field Cameras observations of six type I X-ray bursters , 2002 .

[72]  J. Orosz,et al.  Dynamical Evidence for a Black Hole in X-Ray Nova Ophiuchi 1977 , 1996 .

[73]  I. Mirabel,et al.  A superluminal source in the Galaxy , 1994, Nature.

[74]  A. Parmar,et al.  The bursting behavior of the transient X-ray burst source EXO 0748-676 - A dependence between the X-ray burst properties and the strength of the persistent emission , 1986 .

[75]  Leicester,et al.  The violent past of Cygnus X-2 , 2000, astro-ph/0003441.

[76]  Dawn M. Gelino,et al.  Infrared Observations of Nova Muscae 1991: Black Hole Mass Determination from Ellipsoidal Variations , 2001, astro-ph/0105064.

[77]  D. Chakrabarty,et al.  Discovery of a 270 Hertz X-Ray Burst Oscillation in the X-Ray Dipper 4U 1916–053 , 2000, astro-ph/0010072.

[78]  M. B. Davies,et al.  Ultraluminous X-Ray Sources in External Galaxies , 2001 .

[79]  A. Cox,et al.  Allen's astrophysical quantities , 2000 .

[80]  L. Cominsky,et al.  X-ray observations of the burst source MXB 1728 - 34 , 1984 .

[81]  L. Natalucci,et al.  The first outburst of sax j1808.4-3658 revisited , 2001, astro-ph/0104285.

[82]  P. Martini,et al.  THE MASS OF THE BLACK HOLE IN THE LOW-INCLINATION LMXB TRANSIENT SYSTEM GRO J0422 + 32 (= NOVA PERSEI 1992) , 1997 .

[83]  S. Howell,et al.  Optical identification of the X-ray source GS 2023+338 as V404 Cygni , 1991 .

[84]  S. J. Tingay,et al.  Relativistic motion in a nearby bright X-ray source , 1995, Nature.

[85]  A. R. King,et al.  Resolved Jets and Long-Period Black Hole X-Ray Novae , 2003, astro-ph/0302230.

[86]  A TiO study of the black hole binary GRO J0422+32 in a very low state , 2000, astro-ph/0004235.

[87]  Ping Zhao,et al.  A Black Hole Greater Than 6 M☉ in the X-Ray Nova XTE J1118+480* , 2001 .

[88]  Giuseppina Fabbiano,et al.  X Rays From Normal Galaxies , 1989 .

[89]  J. Orosz,et al.  Orbital Parameters for the Soft X-Ray Transient 4U 1543–47: Evidence for a Black Hole , 1997, astro-ph/9712018.

[90]  J. Grindlay,et al.  Luminosity Differences Between Black Holes and Neutron Stars , 1996 .

[91]  R. Carlberg,et al.  Galactic Chaos and the Circular Velocity at the Sun , 1987 .

[92]  J. Tomsick,et al.  Broad-band X-Ray Spectra of the Black Hole Candidate GRO J1655-40 , 1998, astro-ph/9809098.

[93]  A. Fabian,et al.  Observation of type IX-ray bursts from Cir X-1 , 1986 .

[94]  S. Howell,et al.  Periodic Photometric Variability of the Black Hole Binary V404 Cygni , 1992 .

[95]  J. Greiner,et al.  An unusually massive stellar black hole in the Galaxy , 2001, Nature.

[96]  T. Harrison,et al.  GRO J0422+32: The Lowest Mass Black Hole? , 2003, astro-ph/0308490.

[97]  J. Orosz,et al.  X-Ray Nova XTE J1550–564: RXTE Spectral Observations , 1999, astro-ph/9903395.

[98]  R. Wijnands,et al.  The Burst Behavior of the Eclipsing Low-Mass X-Ray Binary MXB 1659–298 , 2001, astro-ph/0109193.

[99]  R. P. Fender,et al.  MERLIN observations of relativistic ejections from GRS 1915+105 , 1998, astro-ph/9812150.

[100]  Jerome A. Orosz,et al.  The optical light curves of Cygnus X-2 (V1341 Cyg) and the mass of its neutron star , 1999 .

[101]  D. Chakrabarty,et al.  Millisecond Oscillations and Photospheric Radius Expansion in Thermonuclear X-Ray Bursts , 2001, astro-ph/0105042.

[102]  J. Orosz,et al.  Improved Parameters for the Black Hole Binary System X-Ray Nova MUSCAE 1991 , 1996 .

[103]  F. Verbunt.  X-ray sources in globular clusters , 1984, astro-ph/0111439.

[104]  G. Rieke,et al.  The interstellar extinction law from 1 to 13 microns. , 1985 .

[105]  D. Gelino,et al.  The Low Quiescent X-Ray Luminosity of the Neutron Star Transient XTE J2123–058 , 2004, astro-ph/0404287.

[106]  J. Casares,et al.  A 6.5-day periodicity in the recurrent nova V404 Cygni implying the presence of a black hole , 1992, Nature.

[107]  Thomas G. Barnes,et al.  Stellar Angular Diameters and Visual Surface Brightness — I LATE SPECTRAL TYPES , 1976 .

[108]  Alan P. Smale,et al.  A Type I Burst with Radius Expansion Observed from Cygnus X-2 with the Rossi X-Ray Timing Explorer , 1998 .

[109]  L. Pietronero,et al.  On the maximum mass of a neutron star , 1974 .

[110]  J. Tomsick,et al.  XTE J2123–058: A New Neutron Star X-Ray Transient , 1999, astro-ph/9903360.

[111]  G. Lodato,et al.  Memorie della Società Astronomica Italiana , 2005 .

[112]  W. Brandt,et al.  ASCA Observations of the Iron K Complex of Circinus X-1 Near Zero Phase , 1996, astro-ph/9607018.

[113]  The mass of x-ray Nova Scorpii 1994 GRO J1655-40 , 1999, astro-ph/9901334.

[114]  Charles D. Bailyn,et al.  A Black Hole in the Superluminal Source SAX J1819.3–2525 (V4641 Sgr) , 2000, astro-ph/0103045.

[115]  C. Kouveliotou,et al.  Formation and Evolution of Neutron Stars and Black Holes in Binary Systems , 2001 .

[116]  R. Narayan,et al.  Advection-Dominated Accretion and the Spectral States of Black Hole X-Ray Binaries: Application to Nova Muscae 1991 , 1997 .

[117]  Marat Gilfanov,et al.  Low-mass X-ray binaries as a stellar mass indicator for the host galaxy , 2004 .

[118]  D. Schlegel,et al.  Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds , 1997, astro-ph/9710327.

[119]  A. V. Filippenko,et al.  A Black Hole in the X-Ray Nova Velorum 1993 , 1999 .