J/ApJ/784/154ivo://CDS.VizieR/J/ApJ/784/154doi:10.26093/cds/vizier.17840154CDSBrownsberger S.Romani R.W.2017-10-16T08:55:53Z2017-06-19T15:26:50ZCDS support team

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

cds-question@unistra.frpulsarsgamma-ray-astronomyvisible-astronomyh-alpha-photometrystellar-distanceextinctionWe report on a survey for H{alpha} bow shock emission around nearby {gamma}-detected energetic pulsars. This survey adds three Balmer-dominated neutron star bow shocks to the six previously confirmed examples. In addition to the shock around Fermi pulsar PSR J1741-2054, we now report H{alpha} structures around two additional {gamma}-ray pulsars, PSR J2030+4415 and PSR J1509-5850. These are the first known examples of H{alpha} nebulae with pre-ionization halos. With new measurements, we show that a simple analytic model can account for the angular size and flux of the bow shocks' apices. The latter, in particular, provides a new pulsar probe and indicates large moments of inertia and smaller distances than previously assumed in several cases. In particular, we show that the re-measured PSR J0437-4715 shock flux implies I=(1.7+/-0.2)x10^45^/(f_H I_sin i)g cm^2^. We also derive a distance d~0.72 kpc for the {gamma}-ray only pulsar PSR J2030+4415 and revised distances for PSRs J1959+2048 (1.4 kpc) and J2555+6535 (~1 kpc), smaller than the conventional DM-estimated values. Finally, we report upper limits for 94 additional LAT pulsars. An estimate of the survey sensitivity indicates that for a warm neutral medium filling factor {phi}_WNM_~0.3 there should be a total of approximately nine H{alpha} bow shocks in our LAT-targeted survey; given that seven such objects are now known, a much larger {phi}_WNM_ seems problematic.2014ApJ...784..154Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/784/154CatalogResearchIsServedByTAP VizieR generic servicerelated-toVII/189 : Catalog of Pulsars (Taylor+ 1995)J/MNRAS/273/411 : Multifrequency fluxes of 280 pulsars (Lorimer+ 1995)J/MNRAS/405/2243 : GMOS/WIYN spectroscopic catalogue (Trichas+, 2010)J/MNRAS/424/2832 : Pulsars in {gamma}-ray sources (Lee+, 2012)J/ApJS/208/17 : 2nd Fermi LAT cat. of gamma-ray pulsars (2PC) (Abdo+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/784/154https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/784/154http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/784/154https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/784/154https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/784/154http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/784/154GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadioGamma-rayOpticaldefaultJ/ApJ/784/154/table2Pulsars with Flux Upper LimitsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNamePulsar namemeta.id;meta.maincharExpW012 exposure timestime.duration;obs.exposureintTel[GSW] Telescope/camera flag (1)meta.code.errorcharfobs5Measured H{alpha} flux limit at fixed scale (2)1e-05cm**-2.s**-1phot.flux.density;em.gamma.hardfloatDistDistancekpcpos.distance;pos.heliocentricfloatCode[DGKOP] Distance type code (3)meta.codecharAREstimated R band extinctionmagphys.absorption;em.opt.RfloatpVelAdopted perpendicular velocitykm/sphys.velocfloatSpinSpindown power (dE_34_/dt)phys.energyfloatfmod5Expected flux for the WNM model1e-05cm**-2.s**-1phot.flux.density;em.gamma.hardfloatl_Ratio[>] Limit flag on Ratiometa.code.error;arith.ratiocharRatioRatio of observed limit to model flux at the model angular scales (4)phot.flux;arith.ratiofloatThetamodModel angular scalearcsecinstr.scale;meta.modelledfloatl_ThetaI[<>] Limit flag on ThetaImeta.code.errorcharThetaI? Ionization angular scalearcsecinstr.scale;phys.atmol.ionizationfloatnullablenWNMModel local WNM density at the pulsar Z (5)cm**-3phys.densityfloatPhiModel local WNM fill factor at the pulsar Z (5)stat.fit.paramfloatFlg[0/1]? Detectability flag (6)meta.codefloatnullable