J/ApJ/862/L2ivo://CDS.VizieR/J/ApJ/862/L2doi:10.26093/cds/vizier.18629002CDSFavre C.Fedele D.Semenov D.Parfenov S.Codella C.Ceccarelli C.,Bergin E.A.Chapillon E.Testi L.Hersant F.Lefloch B.Fontani F.,Blake G.A.Cleeves L.I.Qi C.Schwarz K.R.Taquet V.2019-09-02T08:25:04Z2019-08-29T13:17:37ZCDS support team

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

cds-question@unistra.frmolecular-physicsinterstellar-mediumyoung-stellar-objectsradio-continuum-emissionThe formation of asteroids, comets, and planets occurs in the interior of protoplanetary disks during the early phase of star formation. Consequently, the chemical composition of the disk might shape the properties of the emerging planetary system. In this context, it is crucial to understand whether and what organic molecules are synthesized in the disk. In this Letter, we report the first detection of formic acid (HCOOH) toward the TW Hydrae protoplanetary disk. The observations of the trans-HCOOH 6_(1,6)-5(1,5)_ transition were carried out at 129GHz with Atacama Large Millimeter/Submillimeter Array (ALMA). We measured a disk-averaged gas-phase t-HCOOH column density of ~(2-4)x10^12^cm^-2^, namely as large as that of methanol. HCOOH is the first organic molecule containing two oxygen atoms detected in a protoplanetary disk, a proof that organic chemistry is very active, albeit difficult to observe, in these objects. Specifically, this simplest acid stands as the basis for synthesis of more complex carboxylic acids used by life on Earth.2018ApJ...862L...2Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/862/L2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/566/L5 : C/2012 F6 (Lemmon) & C/2013 R1 (Lovejoy) sp. (Biver+, 2014)J/A+A/605/A21 : H_2_CO production in HD 163296 (Carney+, 2017)J/A+A/606/A125 : HD163296 DCO+, DCN and N_2_D+ data cubes (Salinas+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/862/L2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/862/L2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/862/L2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/862/L2https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/862/L2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/862/L2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/862/L2/map (Summary of the t-HCOOH channel map)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/862/L2/map?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/862/L2/map?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/862/L2/map?GETtext/xml+votable180.050000true165.4661-34.704810.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJ/862/L26/38382https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/862/L2?format=asciiRadiodefaultJ/ApJ/862/L2/mapSummary of the t-HCOOH channel maprecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget namemeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDimDimension (NxxNyxNz)pixsrc.morph.scLengthcharDateUT date of observationtime.epoch;obscharb_Freq[1.29663e+11] Minimum rest frequencyHzem.freq;stat.mindoubleB_Freq[1.2968e+11] Maximum rest frequencyHzem.freq;stat.maxdoubledFreq[259523] Frequency intervalHzem.freq;src.varintSize[35575] Size of the filebytephys.size;meta.fileintFileNameName of the FITS file in subdirectory mapmeta.id;meta.fitscharDownloadDownload the FITS filemeta.ref.urlchar