J/A+A/605/A57ivo://CDS.VizieR/J/A+A/605/A57doi:10.26093/cds/vizier.36050057CDSFontani F.Ceccarelli C.Favre C.Caselli P. Neri R.Sims I.R.,Kahane C.Alves F.Balucani N.Bianchi E.Caux E.Jaber Al-Edhari A.,Lopez-Sepulcre A.Pineda J.Bachiller R.BIzzocchi L.Bottinelli S.,Chacon-Tanarro A.Choudhury R.Codella C.Coutens A.Dulieu F.Feng S.,Rimola A.Hily-Blant P.Holdship J.Jimenez-Serra I.Laas J.,Lefloch B.Oya Y.Podio L.Pon A.Punanova A.Quenard D.Sakai N.,Spezzano S.Taquet V.Testi L.Theule P.Ugliengo P.Vastel C.,2020-06-11T07:12:02Z2017-09-08T07:40:47ZCDS support team

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

cds-question@unistra.frinfrared-sourcesinterstellar-mediumThe interstellar delivery of carbon atoms locked into molecules might be one of the key ingredients for the emergence of life. Cyanopolyynes are carbon chains delimited at their two extremities by an atom of hydrogen and a cyano group, meaning that they could be excellent reservoirs of carbon. The simplest member, HC_3_N, is ubiquitous in the galactic interstellar medium and found also in external galaxies. Thus, understanding the growth of cyanopolyynes in regions forming stars similar to our Sun, and what affects them, is particularly relevant. In the framework of the IRAM/NOEMA Large Program SOLIS (Seeds Of Life In Space), we have obtained a map of two cyanopolyynes, HC_3_N and HC_5_N, in the protocluster OMC-2 FIR4. Because our Sun is thought to be born in a rich cluster, OMC-2 FIR4 is one of the closest and best known representatives of the environment in which the Sun may have been born. We find a HC_3_N/HC_5_N abundance ratio across the source in the range ~1-30, with the smallest values (<10) in FIR5 and in the Eastern region of FIR4. The ratios <=10 can be reproduced by chemical models only if: (1) the cosmic-ray ionisation rate z is ~4x10^-14^s^-1^; (2) the gaseous elemental ratio C/O is close to unity; and (3) oxygen and carbon are largely depleted. The large z is comparable to that measured in FIR4 by previous works and was interpreted as due to a flux of energetic (>10MeV) particles from embedded sources. We suggest that these sources could lie East of FIR4 and FIR5.2017A&A...605A..57Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/605/A57CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/556/A57 : Transitions in OMC-2 FIR 4 in the far-IR (Kama+, 2013)J/A+A/596/A26 : OMC-2 FIR 3 and FIR 4 [OI] maps (Gonzalez-Garcia+, 2016)J/A+A/605/L3 : SOLIS. I. L1157-B1 NH_2_CHO image (Codella+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/605/A57https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/605/A57http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/605/A57https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/605/A57https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/605/A57http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/605/A57GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/605/A57/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/605/A57/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/605/A57/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/605/A57/list?GETtext/xml+votable180.050000true83.86215-5.1660.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/605/A576/22805https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/605/A57?format=asciiInfrareddefaultJ/A+A/605/A57/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintRVRadial velocitym/sphys.veloc;pos.heliocentricdoublesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitsAssocDataAssociated Data web pagemeta.ref.urlchar