J/ApJ/724/994ivo://CDS.VizieR/J/ApJ/724/994doi:10.26093/cds/vizier.17240994CDSBraakman R.Belloche A.Blake G.A.Menten K.M.2012-09-08T09:54:40Z2012-08-20T11:21:50ZCDS support team

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

cds-question@unistra.frinterstellar-mediummolecular-cloudsatomic-physicsradio-spectroscopyradio-astronomyAs part of an effort to study gas-grain chemical models in star-forming regions as they relate to molecules containing cyanide (-C{\equiv}N) groups, we present here a search for the molecules 2-cyanoethanol (OHCH_2_CH_2_CN) and methoxyacetonitrile (CH_3_OCH_2_CN) in the galactic center region SgrB2. These species are structural isomers of each other and are targeted to investigate the cross-coupling of pathways emanating from the photolysis products of methanol and ammonia with pathways involving cyano-containing molecules. Methanol and ammonia ices are two of the main repositories of the elements C, O, and N in cold clouds and understanding their link to cyanide chemistry could give important insights into prebiotic molecular evolution. Neither species was positively detected, but the upper limits we determined allow comparison to the general patterns gleaned from chemical models. Our results indicate the need for an expansion of the model networks to better deal with cyano-chemistry, in particular with respect to pathways including products of methanol photolysis. In addition to these results, the two main observational routes for detecting new interstellar molecules are discussed.2010ApJ...724..994Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/724/994CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/iram : IRAM Observation Logs 1991-2010 (IRAM 1991-2012)V/112 : Catalog of Star-Forming Regions in the Galaxy (Avedisova, 2002)J/A+A/482/179 : Interferometric study of SgrB2(N) (Belloche+, 2008)J/ApJS/158/188 : Detection of glycolaldehyde toward Sgr B2 (Widicus+, 2005)J/ApJS/155/577 : H2O masers in W49 North and Sagittarius B2 (McGrath+, 2004)J/ApJS/117/427 : Sgr B2 spectral survey (Nummelin+, 1998)J/AZh/71/37 : Thermal Methanol from 33 Clouds at 48 GHz (Slysh+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/724/994https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/724/994http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/724/994https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/724/994https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/724/994http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/724/994GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/ApJ/724/994/table6Transitions of the gauche-conformer of methoxyacetonitrile [CH_3_OCH_2_CN] observed with the IRAM 30m telescope toward Sgr B2(N)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqObserved transition number (1)meta.id;phys.atmol.transProb;phys.atmol.transitionintTransTransition (2)meta.id;phys.atmol.transitionFreqObserved frequencyMHzem.freqdoublee_FreqUncertainty in FreqkHzstat.errorintElowLower energy level in temperature units (E_l_/k_B_)Kphys.energy;phys.atmol.levelintSmu2The S{mu}^2^ coefficientD**2spect.line.intensityfloatsigmaCalculated rms noise level in T_MB_ scalemKinstr.det.noise;meta.modelledintCommAdditional comments (3)meta.noteJ/ApJ/724/994/table7Transitions of the gauche-conformer of 2-cyanoethanol [OHCH_2_CH_2_CN] observed with the IRAM 30m telescope toward Sgr B2(N)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqObserved transition number (1)meta.id;phys.atmol.transProb;phys.atmol.transitionintTransTransition (2)meta.id;phys.atmol.transitionFreqObserved frequencyMHzem.freqdoublee_FreqUncertainty in FreqkHzstat.errorintElowLower energy level in temperature units (E_l_/k_B_)Kphys.energy;phys.atmol.levelintSmu2The S{mu}^2^ coefficientD**2spect.line.intensityfloatsigmaCalculated rms noise level in T_MB_ scalemKinstr.det.noise;meta.modelledintCommAdditional comments (3)meta.note