J/AJ/143/98ivo://CDS.VizieR/J/AJ/143/98doi:10.26093/cds/vizier.51430098CDSWeistrop D.Nelson C.H.Angione R.Bachilla R.Hancock M.Kaiser M.E.2017-07-06T06:25:43Z2013-09-04T08:16:14ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyinterstellar-reddeningredshiftedchemical-abundancesWe report the results of long-slit spectroscopy at position angles 68{deg}, 131{deg}, and 164{deg} for the minor-merger NGC 4194, a luminous infrared starburst galaxy. The mass within 1.2kpc of the dynamical center is estimated to be 4.8*109 to 1.7*1010 M{sun}, depending on the assumed inclination to the plane of the sky. The star formation rate (SFR) in the areas sampled is 8 M{sun}/yr. The metallicity, log(O/H)+12, ranges from ~8.8 to >9.0 in regions of significant star formation, suggesting that the metallicity has been enhanced by the current star formation. The star-forming regions range in age from 5 to 9Myr, with the youngest ages occurring in the regions of high SFR. Electron temperatures and the location of the spectra in emission line diagnostic diagrams suggest the presence of shock waves, presumably due to the presence of supernovae, winds from massive stars, and/or collisions of clouds due to the merger. The presence of massive stars and supernovae is consistent with the ages determined for the star-forming regions. The ages of the continua produced by the stellar population are estimated to range from 10Myr to 5Gyr. Much of the stellar population represented in the continua was probably formed before the merger and represents the progenitor galaxies.2012AJ....143...98Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/98CatalogResearchIsServedByTAP VizieR generic servicerelated-toVII/239 : History and Accurate Positions for the NGC/IC Objects (Corwin, 2004)J/ApJ/701/1398 : SFR for starburst galaxies (Sargsyan+, 2009)J/ApJ/682/1020 : X-ray sources in NGC 4194 and NGC 7541 (Kaaret+, 2008)J/AJ/127/1360 : Star-forming knots in NGC 4194 center (Weistrop+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/98https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/98http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/98https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/143/98https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/143/98http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/143/98GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/143/98/table3Redshift, reddening, and relative fluxes for individual spectrazRedshiftsrc.redshiftdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPAPosition Angle of slitdegobs.paramintDistDistance of the spectrum from the center of the slitarcsecobs.paramfloatPSimbad column added by the CDSmeta.ref.urlintnullableE(B-V)? Reddening calculated for the extracted spectra (see Section 4.1 for more details)magphot.color.excessfloatnullableF3727[1.77/10.56]? Flux of [OII]{lambda}3727 (1)spect.line.intensity;arith.ratiofloatnullableu_F3727Uncertainty flag on F3727 (2)meta.code.errorcharF4959[0.19/0.96]? Flux of [OIII]{lambda}4959 (1)spect.line.intensity;arith.ratiofloatnullableu_F4959Uncertainty flag on F4959 (2)meta.code.errorcharF5007[0.61/1.79]? Flux of [OIII]{lambda}5007 (1)spect.line.intensity;arith.ratiofloatnullableu_F5007Uncertainty flag on F5007 (2)meta.code.errorcharF5755[0.03/0.06]? Flux of [NII]{lambda}5755 (1)spect.line.intensity;arith.ratiofloatnullableu_F5755Uncertainty flag on F5755 (2)meta.code.errorcharF6300[0.05/0.38]? Flux of [OI]{lambda}6300 (1)spect.line.intensity;arith.ratiofloatnullableu_F6300Uncertainty flag on F6300meta.code.errorcharF6548[0.27/0.96]? Flux of [NII]{lambda}6548 (1)spect.line.intensity;arith.ratiofloatnullableu_F6548Uncertainty flag on F6548meta.code.errorcharHa? H{alpha} flux (1)spect.line.intensity;arith.ratiofloatnullableF6583[0.94/2.04]? Flux of [NII]{lambda}6583 (1)spect.line.intensity;arith.ratiofloatnullableu_F6583Uncertainty flag on F6583meta.code.errorcharF6716[0.31/1.01]? Flux of [SII]{lambda}6716 (1)spect.line.intensity;arith.ratiofloatnullableu_F6716Uncertainty flag on F6716meta.code.errorcharF6731[0.27/0.78]? Flux of [SII]{lambda}6731 (1)spect.line.intensity;arith.ratiofloatnullableu_F6731Uncertainty flag on F6731meta.code.errorcharHb? H{beta} flux (in erg/s/cm2/{AA})cW.m**-2.nm**-1phot.fluxdoublenullableu_HbUncertainty flag on Hbmeta.code.errorcharSlitSlit heightpixinstr.setupintJ/AJ/143/98/table4Physical parameters derived from individual spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPAPosition Angle of slitdegobs.paramintDistDistance of the spectrum from the center of the slitarcsecobs.paramfloatObsDisplay the observed fluxes for this pointmeta.ref.urlcharSFR[0/1.48] Star formation rate from H{alpha} emission line SFR(H{alpha}) (see more details in Section 4.2)solMass/yrphys.SFRfloatAb(O)1? Oxygen abundance (12+log(O/H)) using method of Kewley & Dopita (2002ApJS..142...35K) (see Section 4.3 for more details)phys.abundfloatnullableAb(O)2? Oxygen abundance (12+log(O/H)) using R23 method of Zaritsky et al.(1994ApJ...420...87Z) (see Section 4.3 for more details)phys.abundfloatnullableAb(O)3? Oxygen abundance (12+log(O/H)) using R23 method of McGaugh (1991ApJ...380..140M) (see Section 4.3 for more details)phys.abundfloatnullableAge1[5.3/8.2] Age of the gas in the star-forming regions (1)Myrtime.agefloatNe[0.7/8.2]? Electron density n_e_100cm**-3phys.density;phys.electronfloatnullableb_Ne? Lower value of the electron density range (see Section 4.5 for more details)100cm**-3phys.density;stat.minfloatnullableB_Ne? Upper value of the electron density range (see Section 4.5 for more details)100cm**-3phys.density;stat.maxfloatnullableTe? Electron temperature (in degree Celsius) (see Section 4.6 for more details)10000degCphys.temperature.electron;phys.electronfloatnullableb_Te? Lower value of the electron temperature range (see Section 4.6 for more details)10000degCphys.temperature.electron;stat.minfloatnullableB_Te? Upper value of the electron temperature range (see Section 4.6 for more details)10000degCphys.temperature.electron;stat.maxfloatnullableModelStarburst99 Star Formation Model (2)phys.SFR;meta.modelledcharAge2Ages derived from the continum (see Section 5 for more details)Myrtime.agedouble