J/AJ/158/169ivo://CDS.VizieR/J/AJ/158/169doi:10.26093/cds/vizier.51580169CDSSmith B.J.Wagstaff P.Struck C.Soria R.Dunn B.Swartz D.,Giroux M.L.2019-12-03T06:25:11Z2019-12-03T07:05:28ZCDS support team

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

cds-question@unistra.frgalaxiesx-ray-sourcesinterstellar-mediumUsing archival data from the Chandra X-ray telescope, we have measured the spatial extent of the hot interstellar gas in a sample of 49 nearby interacting galaxy pairs, mergers, and merger remnants. For systems with SFR>1 M_{sun}_/yr, the volume and mass of hot gas are strongly and linearly correlated with the star formation rate (SFR). This supports the idea that stellar/supernovae feedback dominates the production of hot gas in these galaxies. We compared the mass of X-ray-emitting hot gas M_X_(gas) with the molecular and atomic hydrogen interstellar gas masses in these galaxies (M_H2_ and M_HI_, respectively), using published carbon monoxide and 21 cm H I measurements. Systems with higher SFRs have larger M_X_(gas)/(M_H2_ + M_HI_) ratios on average, in agreement with recent numerical simulations of star formation and feedback in merging galaxies. The M_X_(gas)/(M_H2_ + M_HI_) ratio also increases with dust temperature on average. The ratio M_X_(gas)/SFR is anticorrelated with the Infrared Astronomical Satellite 60-100 {mu}m flux ratio and with the Spitzer 3.6-24 {mu}m color. These trends may be due to variations in the spatial density of young stars, the stellar age, the ratio of young to old stars, the initial mass function, and/or the efficiency of stellar feedback. Galaxies with low SFR (<1 M_{sun}_/yr) and high K band luminosities may have an excess of hot gas relative to the relation for higher SFR galaxies, while galaxies with low K band luminosities (and therefore low stellar masses) may have a deficiency in hot gas, but our sample is not large enough for strong statistical significance.2019AJ....158..169Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/169CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/57 : The Chandra Source Catalog (CSC), Release 2.0 (Evans+, 2019)J/MNRAS/361/34 : HIPASS catalogue. III. (Doyle+, 2005)J/MNRAS/394/1857 : H_2_/HI ratio in galaxies (Obreschkow+, 2009)J/AJ/143/98 : Spectroscopy of star-forming regions in NGC 4194J/AJ/143/144 : ULX candidates in nearby Arp galaxies (Smith+, 2012)J/MNRAS/426/2601 : CO lines in luminous IR galaxies (Papadopoulos+, 2012)J/ApJ/829/78 : Dust properties of major-merger galaxy pairsJ/MNRAS/464/3882 : Mergers and galaxy-galaxy interactions (Weston+, 2017)J/AJ/155/81 : Diffuse X-ray-emitting gas in major mergers (Smith+, 2018)J/ApJ/855/49 : ALMA astrochemical obs. of the merger NGC 3256J/A+A/627/A107 : CO observations of major merger pairs at z=0https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/169https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/169http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/169https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/158/169https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/158/169http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/158/169GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/158/169/galaxies (Basic data (table 1) , global molecular and atomic gas mass (table 2) in the galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/158/169/galaxies?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/158/169/galaxies?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/158/169/galaxies?GETtext/xml+votable180.050000true177.1932542-27.37908060.005555555555555556Cone search capability for table J/AJ/158/169/table3 (Final ellipses used for volume calculations at 0.3-1.0 keV surface brightness of 3x10^-9^ photons/s/cm^2^/arcsec^2^)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/158/169/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/158/169/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/158/169/table3?GETtext/xml+votable180.050000true177.19185833-27.380308330.005555555555555556Cone search capability for table J/AJ/158/169/table4 (Outer (2{sigma}) ellipses for galaxies with high-S/N observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/158/169/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/158/169/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/158/169/table4?GETtext/xml+votable180.050000true314.61064167-42.6494750.0055555555555555566/226 4181 4993 5241 5523 5799 5989 6034 6042 6046 6098 7552 8492 8673 10210 10515 10752 11029 11101 11180 11206 16755 17183 17252 17286 18212 18714 18753 18809 19678 20875 22721 22826 22828 23215 24735 24920 25344 26028 27643 28147 31081 31158 38139 40321 44947 46079 46130 47078https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/158/169?format=asciiX-raydefaultJ/AJ/158/169/galaxiesBasic data (table 1) , global molecular and atomic gas mass (table 2) in the galaxiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharprimarymoreindicates data in Tables 3-4 for this galaxymeta.ref.urlcharStage[1/7] Merger stage (1)meta.code;src.morphintDist[9.8/184] DistanceMpcpos.distance;pos.heliocentricfloatlogLFIR[8.4/12.19] Log far-infrared luminosity from IRASlog(solLum)phys.luminosity;em.IRfloatlogLK[9.06/12.36] Log near-infrared K_s_ band luminosity from 2MASSlog(solLum)phys.luminosity;em.IR.KfloatSFR[0.03/450.05] Star formation ratesolMass/yrphys.SFRfloatl_logLX(gas)[<] Limit flag on logLX(gas)meta.code.errorcharlogLX(gas)[38.76/42.08] Thermal luminosity (in erg/s)log(1e-07W)phys.luminosity;em.X-rayfloatAGNGalaxy classification in the NASA Extragalactic Database (NED) (2)src.classcharlogM(H2)1[7.39/10.56]? Molecular gas mass (1)log(solMass)phys.massfloatnullablelogM(H2)2[7.79/10.17]? Molecular gas mass (2)log(solMass)phys.massfloatnullableCORef[1/15]? Reference for the original CO measurement (3)meta.codeintnullablelog(SFE)1[-9.88/-7.19]? Log star formation efficiency (1)log(yr**-1)stat.paramfloatnullablelog(SFE)2[-9.88/-6.67]? Log star formation efficiency (2)log(yr**-1)stat.paramfloatnullablelogM(H1)[8.79/10.64]? Log global H I masslog(solMass)phys.massfloatnullableHIRef[16/26]? Reference for the H I data (4)meta.codeintnullablelogMhot[6.85/9.75]? Log mass of the hot X-ray-emitting gaslog(solMass)phys.massfloatnullablelog(Mhot/Mcold)1[-2.52/-0.67]? Log hot-to-cold gas mass ratio (1)phys.mass;arith.ratiofloatnullablelog(Mhot/Mcold)2[-2.52/-0.41]? Log hot-to-cold gas mass ratio (2)phys.mass;arith.ratiofloatnullable_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/AJ/158/169/table3Final ellipses used for volume calculations at 0.3-1.0 keV surface brightness of 3x10^-9^ photons/s/cm^2^/arcsec^2^recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharONameOther name of galaxy (only in Table 3) (1)meta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainRmaj1[8.95/143.52] Major axis radiusarcsecphys.angSizefloatRmin1[4.4/112.32] Minor axis radiusarcsecphys.angSize;srcfloatRmaj2[2.48/60] Major axis radiuskpcphys.sizefloatRmin2[0.85/49.64] Minor axis radiuskpcphys.angSize;srcfloatPA[0/357] Position angle (2)degpos.posAngintNa[1/13]? Number of annuli used in the radial profile (only in Table 3)meta.numberintnullableCounts[27/55121] Point-source subtracted, background subtracted 0.3-1.0 keV counts in the final ellipsectphot.count;em.X-rayinte_Counts[7/292] Uncertainty in Countsctstat.error;phot.countintJ/AJ/158/169/table4Outer (2{sigma}) ellipses for galaxies with high-S/N observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGalaxy namemeta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainRmaj1[8.95/143.52] Major axis radiusarcsecphys.angSizefloatRmin1[4.4/112.32] Minor axis radiusarcsecphys.angSize;srcfloatRmaj2[2.48/60] Major axis radiuskpcphys.sizefloatRmin2[0.85/49.64] Minor axis radiuskpcphys.angSize;srcfloatPA[0/357] Position angle (2)degpos.posAngintCounts[27/55121] Point-source subtracted, background subtracted 0.3-1.0 keV counts in the final ellipsectphot.count;em.X-rayinte_Counts[7/292] Uncertainty in Countsctstat.error;phot.countintl_SB[=<] Limit flag on SB (only in Table 4)meta.code.errorcharSB[2.4/116]? 0.3-1.0keV surface brightness (only in Table 4)1e-10ph.s**-1.cm**-2.arcsec**-2phot.mag.sbfloatnullable