Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.rights.license© ESO 2020-
dc.contributor.authorPereira Santaella, M.-
dc.contributor.authorColina, L.-
dc.contributor.authorGarcía Burillo, S.-
dc.contributor.authorGonzález Alfonso, E.-
dc.contributor.authorAlonso Herrero, A.-
dc.contributor.authorArribas, S.-
dc.contributor.authorCazzoli, S.-
dc.contributor.authorPiqueras López, J.-
dc.contributor.authorRigopoulou, D.-
dc.contributor.authorUsero, A.-
dc.contributor.otherUnidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737-
dc.identifier.citationAstronomy and Astrophysics 643: A89(2020)es
dc.description.abstractWe used high-spatial resolution (70 pc; 03) CO multi-transition (J = 1–0, 2–1, 4–3, and 6–5) ALMA data to study the physical conditions and kinematics of the cold molecular outflow in the local luminous infrared galaxy (LIRG) ESO 320-G030 (d = 48 Mpc, LIR/L⊙ = 1011.3). ESO 320-G030 is a double-barred isolated spiral, but its compact and obscured nuclear starburst (SFR ∼ 15 M⊙ yr−1; AV ∼ 40 mag) resembles those of ultra-luminous infrared galaxies (LIR/L⊙ > 1012). In the outflow, the CO(1–0)/CO(2–1) ratio is enhanced with respect to the rest of the galaxy and the CO(4–3) transition is undetected. This indicates that the outflowing molecular gas is less excited than the molecular gas in the nuclear starburst (i.e., outflow launching site) and in the galaxy disk. Non-local thermodynamic equilibrium radiative transfer modeling reveals that the properties of the molecular clouds in the outflow differ from those of the nuclear and disk clouds: The kinetic temperature is lower (Tkin ∼ 9 K) in the outflow, and the outflowing clouds have lower column densities. Assuming a 10−4 CO abundance, the large internal velocity gradients, 60−45+250 km s−1 pc−1, imply that the outflowing molecular clouds are not bound by self-gravity. All this suggests that the life-cycle (formation, collapse, dissipation) of the galaxy disk molecular clouds might differ from that of the outflowing molecular clouds which might not be able to form stars. The low kinetic temperature of the molecular outflow remains constant at radial distances between 0.3 and 1.7 kpc. This indicates that the heating by the hotter ionized outflow phase is not efficient and may favor the survival of the molecular gas phase in the outflow. The spatially resolved velocity structure of the outflow shows a 0.8 km s−1 pc−1 velocity gradient between 190 pc and 560 pc and then a constant maximum outflow velocity of about 700–800 km s−1 up to 1.7 kpc. This could be compatible with a pure gravitational evolution of the outflow, which would require coupled variations of the mass outflow rate and the outflow launching velocity distribution. Alternatively, a combination of ram pressure acceleration and cloud evaporation could explain the observed kinematics and the total size of the cold molecular phase of the
dc.description.sponsorshipWe thank the referee for their comments and suggestions. We thank M. Villar-Martin for useful comments and careful reading of the manuscript. MPS acknowledges support from the Comunidad de Madrid through the Atraccion de Talento Investigador Grant 2018-T1/TIC-11035, PID2019-105423GA-I00 (MCIU/AEI/FEDER,UE), and STFC through Grants ST/N000919/1 and ST/N002717/1. L. C. acknowledge financial support by the Spanish MICINN under Grant ESP2017-83197. A. A.-H., S. G.-B., and A. U. acknowledge support through Grant PGC2018-094671-B-I00 (MCIU/AEI/FEDER,UE). E. GA is a Research Associate at the Harvard-Smithsonian Center for Astrophysics, and thanks the Spanish Ministerio de Economia y Competitividad for support under project ESP2017-86582-C4-1-R. J. P.-L. acknowledge financial support by the Spanish MICINN under Grant AYA2017-85170-R. M. P. S., A. A.-H., L. C., J. P.-L. and S. A. work was done under project No. MDM-2017-0737 Unidad de Excelencia "Maria de Maeztu"- Centro de Astrobiologia (INTA-CSIC). DR acknowledges support from ST/S000488/1 and the University of Oxford Fell Fund. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2016.1.00263.S, ADS/JAO.ALMA#2013.1.00271.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan) and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. ; With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737).es
dc.publisherEDP Scienceses
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105423GA-I00-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-094671-B-I00/ES/EVOLUCION DE GALAXIAS Y SUS AGUJEROS NEGROS CON ALTA RESOLUCION ESPACIAL: FEEDBACK, EL TORO Y FORMACION ESTELAR/-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-83197-P-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2017-85170-R/ES/PARTICIPACION DEL CENTRO DE ASTROBIOLOGIA (CAB, CSIC/INTA) EN EL DESARROLLO DEL INSTRUMENTO HARMONI PARA EL EXTREMELY LARGE TELESCOPE (ELT): FASE DE DISEÑO FINAL (FDR)/-
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-86582-C4-1-R/ES/CONTRIBUCION ESPAÑOLA A LAS MISIONES ESPACIALES CRIOGENICAS SPICA Y ATHENA, POST-OPERACIONES DE HERSCHEL Y EXPLOTACION CIENTIFICA MULTIFRECUENCIA/-
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationales
dc.subjectGalaxies: ISMes
dc.subjectGalaxies: nucleies
dc.subjectInfrared: galaxieses
dc.subjectISM: moleculeses
dc.titleExcitation and acceleration of molecular outflows in LIRGs: The extended ESO 320-G030 outflow on 200-pc scaleses
dc.contributor.orcidUsero, A. [0000-0003-1242-505X]-
dc.contributor.orcidPereira Santaella, M. [0000-0002-4005-9619]-
dc.contributor.funderComunidad de Madrid-
dc.contributor.funderAgencia Estatal de Investigación (AEI)-
dc.description.peerreviewedPeer reviewes
Appears in Collections:(CAB) Artículos

Files in This Item:
File Description SizeFormat 
aa38838-20.pdf2,13 MBAdobe PDFThumbnail

This item is licensed under a Creative Commons License Creative Commons