J/AJ/157/176ivo://CDS.VizieR/J/AJ/157/176doi:10.26093/cds/vizier.51570176CDSBinder B.A.Behr P.Povich M.S.2021-11-03T07:20:14Z2019-08-06T12:23:02ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmilky-way-galaxyx-ray-sourcesob-starsstellar-spectral-typesstellar-distanceWe present a stacking analysis of 2.61 Ms of archival Chandra observations of stellar wind bow shocks. We place an upper limit on the X-ray luminosity of infrared-detected bow shocks of <2x10^29^ erg/s, a more stringent constraint than has been found in previous archival studies and dedicated observing campaigns of nearby bow shocks. We compare the X-ray luminosities and L_X_/L_bol_ ratios of bow shock driving stars to those of other OB stars within the Chandra field of view. Driving stars are, on average, of later spectral type than the field-of-view OB stars, and we do not observe any unambiguously high L_X_/L_bol_ ratios indicative of magnetic stars in our sample. We additionally assess the feasibility of detecting X-rays from stellar wind bow shocks with the proposed Lynx X-ray Observatory. If the X-ray flux originating from the bow shocks is just below our Chandra detection limit, the nearest bow shock in our sample (at ~0.4 kpc with an absorbing column of ~10^21^/cm^2^) should be observable with Lynx in exposure times on the order of ~100 ks.2019AJ....157..176Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/157/176CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/578/A45 : E-BOSS. II. Catalogue second release (Peri+, 2015)J/ApJS/227/18 : Candidate stellar bowshock nebulae from MIR (Kobulnicky+, 2016)J/AJ/154/201 : IR properties of stellar bowshock nebulae (Kobulnicky+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/157/176https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/157/176http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/157/176https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/157/176https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/157/176http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/157/176GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/157/176/table1 (Chandra observations containing stellar bow shocks)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/157/176/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/157/176/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/157/176/table1?GETtext/xml+votable180.050000true281.6029167-2.97611110.005555555555555556Cone search capability for table J/AJ/157/176/table2 (Bow shocks in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/157/176/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/157/176/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/157/176/table2?GETtext/xml+votable180.050000true275.095-16.1427780.005555555555555556Cone search capability for table J/AJ/157/176/table3 (*X-ray detected OB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/157/176/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/157/176/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/157/176/table3?GETtext/xml+votable180.050000true79.07541734.3123060.0055555555555555566/1293 14358 14671 14693 14712 28814 28825 28828 28875 28897 28900 29101 29113 29116 29118 29162 29523 29529 30219 30244 30256 30258-30259 30262 30269 30315 30318 30330 30604 30619 30622 30645 30688 30818 37333 37335 37343 37930 38016 38026 41681 41684 41780 41814 42171-42172 42174 42213 42215 42225 42379 42393 42396 42435 42439 42441 42460 42462 43020https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/157/176?format=asciiX-raydefaultJ/AJ/157/176/table1Chandra observations containing stellar bow shocksrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[748/20120] Chandra observation identifiermeta.id;obs.param;obsintDateObservation datetime.epoch;obsnullableACIS[IS] ACIS detectormeta.notecharRAJ2000Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (1)pos.eq.dec;meta.mainExpT[1.3/149.4] Effective exposure timekstime.duration;obs.exposurefloatNbow[1/3] Number of bow shocks contained within 5' of the nominal aim pointmeta.numberintJ/AJ/157/176/table2Bow shocks in the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameBow shock namemeta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainR0[1.5/40.6] Standoff radius R_0_arcsecphys.angSize;srcfloatPA[5/355] Position angledegpos.posAngintExpT[1.3/325.9] X-ray exposure timekstime.duration;obs.exposurefloatOAA[0.1/4.9] Off-axis angle (G1)arcmininstr.offsetfloatJ/AJ/157/176/table3*X-ray detected OB starsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainCtpStellar counterpart(s)meta.id;meta.maincharSpTypeSpectral type(s) from SIMBADsrc.spTypecharl_Dist[<] Limit flag on Distmeta.code.errorcharDist[0.41/11.7]? Distance (1)kpcpos.distance;pos.heliocentricfloatnullablee_Dist[0.01/4.9]? Uncertainty in Distkpcstat.errorfloatnullableCts[5/3004] Net counts, 0.5-7 keVctphot.count;em.X-rayintExpT[2.4/140.5] Exposure timekstime.duration;obs.exposurefloatOAA[0.1/5] Off-axis angle (G1)arcmininstr.offsetfloatlogLX[29.6/33.2]? Log X-ray luminosity (in erg/s)log(1e-07W)phys.luminosity;em.X-rayfloatnullableDriv[Y/N] Driving star?meta.codecharNoteNote (2)meta.notechar