J/ApJ/799/163ivo://CDS.VizieR/J/ApJ/799/163doi:10.26093/cds/vizier.17990163CDSMiller B.P.Gallo E.Wright J.T.Pearson E.G.2017-10-12T13:00:13Z2015-07-16T09:12:40ZCDS support team

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

cds-question@unistra.frmultiple-starsx-ray-sourcessolar-system-planetsWe investigate whether magnetic interaction between close-in giant planets and their host stars produce observable statistical enhancements in stellar coronal or chromospheric activity. New Chandra observations of 12 nearby (d<60pc) planet-hosting solar analogs are combined with archival Chandra, XMM-Newton, and ROSAT coverage of 11 similar stars to construct a sample inoculated against inherent stellar class and planet-detection biases. Survival analysis and Bayesian regression methods (incorporating both measurements errors and X-ray upper limits; 13/23 stars have secure detections) are used to test whether "hot Jupiter" hosts are systematically more X-ray luminous than comparable stars with more distant or smaller planets. No significant correlations are present between common proxies for interaction strength (M_P_/a^2^ or 1/a) versus coronal activity (L_X_ or L_X_/L_bol_). In contrast, a sample of 198 FGK main-sequence stars does show a significant (~99% confidence) increase in X-ray luminosity with M_P_/a^2^. While selection biases are incontrovertibly present within the main-sequence sample, we demonstrate that the effect is primarily driven by a handful of extreme hot-Jupiter systems with M_P_/a^2^>450M_Jup_AU^-2^, which here are all X-ray luminous but to a degree commensurate with their Ca II H and K activity, in contrast to presented magnetic star-planet interaction scenarios that predict enhancements relatively larger in L_X_. We discuss these results in the context of cumulative tidal spin-up of stars hosting close-in gas giants (potentially followed by planetary infall and destruction). We also test our main-sequence sample for correlations between planetary properties and UV luminosity or Ca II H and K emission, and find no significant dependence.2015ApJ...799..163Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/799/163CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)J/A+A/567/A128 : X-ray sources in WASP-18 field (Pillitteri+, 2014)J/A+A/552/A119 : Planet-star and moon-planet interaction (Saur+, 2013)J/ApJ/766/9 : GALEX observations of exoplanet host stars (Shkolnik, 2013)J/A+A/540/A82 : CaIIHK emission in stars with close planets (Krejcova+, 2012)J/PASP/123/412 : Exoplanet Orbit Database (Wright+, 2011)J/MNRAS/411/L46 : Exoplanet magnetic fields (Vidotto+, 2011)J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)J/ApJS/182/97 : Radial velocities of multi-planet systems (Wittenmyer+, 2009)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/A+A/475/359 : Predicting radio fluxes of exoplanets (Griessmeier+, 2007)J/ApJ/646/523 : Exoplanet systems with stellar companions (Raghavan+, 2006)J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)J/ApJS/152/261 : Chromospheric Ca II emission in nearby stars (Wright+, 2004)J/A+A/333/231 : O-M stars model atmospheres (Bessell+ 1998)http://exoplanets.org/ : Exoplanet Orbit Database home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/799/163https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/799/163http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/799/163https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/799/163https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/799/163http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/799/163GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/799/163/table1 (Sample properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/799/163/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/799/163/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/799/163/table1?GETtext/xml+votable180.050000true1.5798981-49.07519110.0055555555555555566/311 431 679 725 748 1544 1597 2110 2152 2374 2416 2472 2497 3979 4528 4881 5009 5309 5522 5718 6760 6791 6831 7240 7746 8357 8843 9403 9483 9662 9843 11589 12146 12465 12502 12644 12899 12983 13808 14412 14419 14525 14548 14682 15174 16652 16707 16823 17266 17341 17496 17587 17641 17954 18614 18747 18821 18835 19619 19912 20145 20557 20582 20746 21326 21838 21906 22036 22252 22590 22654 22837 22878 23013 23030 23201 23414 23646 23681 24019 24178 24831 24924 25939 26183 26242 26575 26790 26901 26978 26997 27018 27088 27616 27750 27975 28400 28571 28763 28767 29291 29513 29541 30015 30378 30526 31374 32509 32561 32848 32930 33042 33182 33243 33430 33456 33510 33630 33717 33813 33923 33974 34446 34905 35079 35362 35392 35415 35442 35532 35907 35954 35968 36506 36697 37018 37573 37954 37955 38162 38238 38414 38461 38545 38728 38807 38998 39257 39364 39646 40066 40101 40442 40692 40985 41058 41167 41432 41446 41607 41724 42221 42248 42281 42318 42333 42386 42510 42760 42934 43012 43228 43374 43677 43813 43818 43911 44243 44398 44740 45364 45717 45865 46111 46215 46297 46306 46800 46967 47550 47590 47930 48105 48402 48519 48530 48545 48652https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/799/163?format=asciiX-raydefaultJ/ApJ/799/163/table1Sample propertiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of host star (1)meta.id;meta.maincharm_NameComponent ID of the primary planet (1)meta.code.multipcharTeff[4640/6387] Effective stellar temperatureKphys.temperature.effectiveintLbol[32.7/34.4] Log bolometric luminosity; erg/slog(1e-07W)phys.luminosityfloatR'HK[-5.2/-4.42]? R'HK activity indexphot.flux;arith.ratiofloatnullableRMS[0.7/62]? RMS velocitym/sstat.stdev;phys.velocfloatnullableMsini[0.01/19] Minimum planet mass in Jupiter units(1.898187x10+27kg)phys.massfloata[0.03/6.8] Semi-major axis of planetary orbitAUphys.size.smajAxisfloatPeriod[2.2/5894] Planetary orbital perioddtime.periodfloatK[0.7/1813] Radial velocity semi-amplitudem/sphys.veloc;src.orbitalfloatMp/a2The Mp/a^2^ ratio(1.898187x10+27kg)/AU2stat.fit.paramfloat1/a[0.1/33] Inverse separationAU**-1stat.fit.paramfloatLx[26/29.6] Log X-ray luminosity; erg/slog(1e-07W)phys.luminosity;em.X-rayfloate_Lx[0/0.4] Uncertainty on Lxlog(1e-07W)stat.errorfloatLx/LbLog X-ray to bolometric luminosity ratiophys.luminosity;arith.ratiofloatX[0/1] X-ray detection; 1=det and 0=limitmeta.codeintObsObservatory for Lx (2)meta.id;instr.obstycharS[0/2] in solar analog sample (1=yes) (3)meta.codeintChSimbad column added by the CDSmeta.codeintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/799/163/table2Chandra (archival and new) observations of solar analogsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharObsID[10825/13669] Chandra observation identifiermeta.id;obs.param;obsintf_ObsID[a] observations from Chandra Archive (1)meta.codecharHJDHeliocentric Julian Date at the beginning of the observationdtime.epochdoublephi[0/1] Radial-velocity orbital phase {phi} relative to our line of sighttime.phasefloatExp[4.9/14.9] Effective exposure timekstime.expofloatl_CtsLimit flag on Ctsmeta.code.errorcharCts[2.9/42.8] Net counts within a 2" aperture (2)ctphot.count;em.X-rayfloatf_Cts[b] (1)meta.codecharl_RateLimit flag on Ratemeta.code.errorcharRate[0.2/3.6] Net counts per ksct/ksphot.count;em.X-rayfloatl_FluxLimit flag on Fluxmeta.code.error;phot.fluxcharFlux[0.8/14.2] Unabsorbed 0.2-2keV flux for a mekal model with logT=7aW.m**-2phot.flux;em.X-rayfloatDist[15/58] Distance calculated from Hipparcos parallaxpcpos.distance;pos.heliocentricfloatl_LxLimit flag on Lxmeta.code.errorcharLx[26/27.7] Log of 0.2-2keV X-ray luminosity in erg/slog(1e-07W)phys.luminosity;em.X-rayfloate_Lx[0.1/0.4]? Lx uncertaintylog(1e-07W)stat.errorfloatnullableVmag[5.3/8.5] Apparent V-band magnitudemagphot.mag;em.opt.VfloatLbol[33.5/33.9] Bolometric luminositylog(1e-07W)phys.luminosityfloatl_Lx/LbLimit flag on Lx/Lbmeta.code.error;phys.abundcharLx/Lb[-8/-5.9] Log X-ray to bolometric luminosity ratiophys.luminosity;arith.ratiofloat