J/ApJ/885/105ivo://CDS.VizieR/J/ApJ/885/105doi:10.26093/cds/vizier.18850105CDSRangelov B.Montmerle T.Federman S.R.Boisse P.Gabici S.2025-03-03T20:11:02Z2025-01-22T12:53:32ZCDS support team

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

cds-question@unistra.frx-ray-sourcesinfrared-photometryradio-sourceso-starsactive-galactic-nucleiWe present results of our Chandra/ACIS observations of the field centered on the fast, runaway O star AE Aur and its bow shock. Previous XMM-Newton observations revealed an X-ray "blob" near the IR arc tracing the bow shock, possibly a nonthermal source consistent with models of Inverse Compton scattering of dust IR photons by electrons accelerated at the shock. The new, subarcsecond-resolution Chandra data, while confirming the presence of the XMM-Newton source, clearly indicate that the latter is neither extended nor coincident with the IR arc and strongly suggest it is a background active galactic nucleus. Motivated by results published for the bow shock of BD+43{deg}3654, we extended our study to the radio domain by analyzing archival EVLA data. We find no radio emission from the AE Aur bow shock either. The corresponding upper limits for the absorbed (unabsorbed) X-ray flux of 5.9(7.8)x10^-15^erg/cm^2^/s (3{sigma}) and, in the radio range of 2mJy (1.4GHz) and 0.4mJy (5.0GHz), are used to put constraints on model predictions for particle acceleration within the bow shock. In the "classical" framework of diffusive shock acceleration, we find that the predicted X-ray and radio emission by the bow shock is at least two orders of magnitude below the current upper limits, consistent with the systematic nondetections of up to 60 stellar bow shocks. The only exception so far remains that of BD+43{deg}3654, which is probably the result of its very large mass-loss rate among runaway O stars.2019ApJ...885..105Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/885/105CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)B/xmm : XMM-Newton Obs. Log (XMM-Newton Science Operation Center, 2012-)B/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017)B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-)I/284 : The USNO-B1.0 Catalog (Monet+ 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/328 : AllWISE Data Release (Cutri+ 2013)J/A+A/331/949 : Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)J/ApJS/117/361 : PNe in NRAO VLA Sky Survey (Condon+ 1998)J/ApJS/169/401 : ChaMP X-ray point source catalog (Kim+, 2007)J/A+A/493/339 : XMM-Newton serendipitous Survey. V. (Watson+, 2009)J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)J/A+A/578/A45 : E-BOSS. II. Catalogue second release (Peri+, 2015)J/ApJ/827/96 : WISE census of YSOs in Canis Major (Fischer+, 2016)J/A+A/594/A116 : HI4PI spectra and column density maps (HI4PI team+, 2016)J/A+A/612/A3 : HESS Galactic supernova remnants (Hess+, 2018)J/AJ/157/176 : X-ray emission from Gal. stellar bow shocks (Binder+, 2019)J/AN/341/645 : AE Aur and iota Ori runaway stars RV curves (Heyne+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/885/105https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/885/105http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/885/105https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/885/105https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/885/105http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/885/105GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/885/105/table2 (X-ray sources (ObsID 19445))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/885/105/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/885/105/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/885/105/table2?GETtext/xml+votable180.050000true78.8714274534.295597450.005555555555555556Cone search capability for table J/ApJ/885/105/table3 (Selected radio sources in the C- and L-band archival EVLA fields centered on AE Aur)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/885/105/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/885/105/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/885/105/table3?GETtext/xml+votable180.050000true78.941240834.22941060.0055555555555555566/12931.0071625620485927e-24 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/885/105?format=asciiX-rayInfraredRadiodefaultJ/ApJ/885/105/table2X-ray sources (ObsID 19445)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCAX[1/114] CAX Sequential running identifiermeta.id;meta.mainintRAJ2000[78.87/79.3] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[34.15/34.5] Declination (J2000)degpos.eq.dec;meta.mainNet[4/3397]? Background subtracted net counts, ObsID 19445 onlyphot.count;em.X-ray;src.netfloatnullableFx[4.6e-16/2.4e-12]? X-ray flux in the 0.5-7keV band, erg/s/cm2mW.m**-2phot.flux;em.X-raydoublenullablee_Fx[4.7e-16/7.8e-14]? Uncertainty in FxmW.m**-2stat.error;phot.flux;em.X-raydoublenullableImag[5.8/17.42]? USNO-B1 I band magnitudemagphot.mag;em.opt.IfloatnullableJmag[5.3/16.1]? 2MASS J band magnitudemagphot.mag;em.IR.JfloatnullableW1mag[5.3/15.2]? WISE W1 band magnitudemagphot.mag;em.IR.3-4umfloatnullableClassMachine-learning based Class ("AGN", 3 occurrences; or "STAR", 5 occurrences)src.class.starGalaxycharProb[71/92]? Classification confidence%stat.probability;src.class.starGalaxyintnullableFlagSource Flags (1)meta.codecharJ/ApJ/885/105/table3Selected radio sources in the C- and L-band archival EVLA fields centered on AE AurRAJ2000[78.94/79.2] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[34.2/34.4] Declination (J2000)degpos.eq.dec;meta.mainLflux[1.47/13.1] L-band (tuned at 1.52GHz) flux (1)mJyphot.flux.density;em.radio.1500-3000MHzfloatCflux[0.8/1.6]? C-band (tuned at 5.5GHz) flux (2)mJyphot.flux.density;em.radio.3-6GHzfloatnullablealpha[-1.63/-0.36]? Spectral index {alpha} from L to C frequencyspect.indexfloatnullableFlagSource flag (3)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEVSEVLA source sequential running identifier (<[RMF2019] EVS-N> in Simbad)meta.id;meta.maincharIdentIdentificationmeta.id.crosschar