A Survey of CH2DOH Towards Starless and Prestellar Cores in the Taurus Molecular Cloud

Abstract

Recent observations indicate that organic molecules are prevalent towards starless and prestellar cores. Deuteration of these molecules has not been well-studied during the starless phase. Published observations of singly-deuterated methanol, CH${}_2$DOH, have only been observed in a couple of well-studied, dense and evolved prestellar cores (e.g. L1544, L183). Since the formation of gas-phase methanol during this cold phase is believed to occur via desorption from the icy grain surfaces, observations of CH${}_2$DOH may be useful as a probe of the deuterium fraction in the ice mantles of dust grains. We present a systematic survey of CH${}_2$DOH towards 12 starless and prestellar cores in the B10 region of the Taurus Molecular Cloud. Nine of the twelve cores are detected with [CH${}_2$DOH]/[CH${}_3$OH] ranging from $<0.04$ to $0.23_{-0.06}^{+0.12}$ with a median value of $0.11$. Sources not detected tend to have larger virial parameters and larger methanol linewidths than detected sources. The results of this survey indicate that deuterium fractionation of organic molecules, such as methanol, during the starless phase may be more easily detectable than previously thought.

arXiv commentTo be published in MNRAS

References in corpus (47)

• Planck 2015 results. XIII. Cosmological parameters
• A computer program for fast non-LTE analysis of interstellar line spectra
• Cold Dark Clouds: The Initial Conditions for Star Formation
• Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?
• Probing the evolutionary status of starless cores through N2H+ and N2D+ observations
• Cores, filaments, and bundles: hierarchical core formation in the L1495/B213 Taurus region
• How to Calculate Molecular Column Density
• Molecular ions in L1544. II. The ionization degree
• Tracing the Mass during Low-Mass Star Formation. II. Modelling the Submillimeter Emission from Pre-Protostellar Cores
• The Taurus Spitzer Survey: New Candidate Taurus Members Selected Using Sensitive Mid-Infrared Photometry
• On the Formation of CO2 and Other Interstellar Ices
• First detection of triply-deuterated methanol
• Detection of doubly-deuterated methanol in the solar-type protostar IRAS16293-2422
• The Spatial Distribution of Complex Organic Molecules in the L1544 Pre-stellar Core
• From Filamentary Networks to Dense Cores in Molecular Clouds: Toward a New Paradigm for Star Formation
• The ALMA-PILS survey: Isotopic composition of oxygen-containing complex organic molecules toward IRAS 16293-2422B
• CO Depletion and Deuterium Fractionation in Prestellar Cores
• A Large Catalog of Accurate Distances to Molecular Clouds from PS1 Photometry
• An empirical model for protostellar collapse
• The Degree of CO Depletion in Pre-stellar Cores
• Testing grain surface chemistry : a survey of deuterated formaldehyde and methanol in low-mass Class 0 protostars
• Multilayer modeling of porous grain surface chemistry I. The GRAINOBLE model
• The ALMA-PILS survey: Inventory of complex organic molecules towards IRAS 16293-2422 A
• Multilayer formation and evaporation of deuterated ices in prestellar and protostellar cores
• A census of dense cores in the Taurus L1495 cloud from the Herschel Gould Belt Survey
• The primordial deuterium abundance of the most metal-poor damped Lyman-alpha system
• Deuterated methanol in the pre-stellar core L1544
• H-D Substitution in Interstellar Solid Methanol: A Key Route for D Enrichment
• Deuterium fractionation on interstellar grains studied with modified rate equations and a Monte Carlo approach
• Complex organic molecules in low-mass protostars on solar system scales -- I. Oxygen-bearing species
• Modeling the Physical Structure of the Low Density Pre-protostellar Core Lynds 1498
• Formaldehyde and methanol deuteration in protostars: fossiles from a past fast high density pre-collapse phase
• Observational Constraints on Submillimeter Dust Opacity
• Prevalence of Complex Organic Molecules in Starless and Prestellar Cores within the Taurus Molecular Cloud
• Reactive Desorption of CO Hydrogenation Products under Cold Pre-stellar Core Conditions
• The ALMA-PILS survey: Formaldehyde deuteration in warm gas on small scales toward IRAS 16293-2422 B
• Chemical desorption versus energy dissipation: insights from ab-initio molecular dynamics of HCO formation
• Deuterium fractionation on interstellar grains studied with the direct master equation approach
• Mapping deuterated methanol toward L1544: I. Deuterium fraction and comparison with modeling
• An Ammonia Spectral Map of the L1495-B218 Filaments in the Taurus Molecular Cloud : I. Physical Properties of Filaments and Dense cores
• Decrease of the organic deuteration during the evolution of Sun-like protostars: the case of SVS13-A
• The ALMA-PILS survey: The first detection of doubly-deuterated methyl formate (CHD2OCHO) in the ISM
• Deuterium Fractionation: the Ariadne's Thread from the Pre-collapse Phase to Meteorites and Comets today
• Interferometric observations of warm deuterated methanol in the inner regions of low-mass protostars
• Deuterated methanol on Solar System scale around the HH212 protostar
• On the stability of non-isothermal Bonnor-Ebert spheres
• L1495 Revisited: A PPMAP View of a Star-Forming Filament

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• Prestellar grain-surface origins of deuterated methanol in comet 67P/Churyumov-Gerasimenko
• Chemical survey of Class I protostars with the IRAM-30m
• Methanol deuteration in high-mass protostars
• Chemical Differentiation and Temperature Distribution on a Few au Scale around the Protostellar Source B335
• Chemical and Physical Characterization of the Isolated Protostellar Source CB68: FAUST. IV
• First detection of CHD${}_2$OH towards pre-stellar cores
• Millimetre and sub-millimetre spectroscopy of doubly deuterated acetaldehyde (CHD2CHO) and first detection towards IRAS 16293-2422
• Non-Equilibrium Abundances Treated Holistically (NEATH): the molecular composition of star-forming clouds
• 3D Radiative Transfer Modelling and Virial Analysis of Starless Cores in the B10 Region of the Taurus Molecular Cloud
• The initial magnetic criticality of prestellar cores
• Rotational spectroscopy of CH${}_3$OD with a reanalysis of CH${}_3$OD toward IRAS 16293$-$2422
• Nascent chemical complexity in prestellar core IRAS 16293E: complex organics and deuterated methanol
• Studying the chemical and kinematical structures of dense cores TMC-1C, L1544, and TMC-1 in the Taurus molecular cloud using the CCS and NH3 observations
• Gas phase Elemental abundances in Molecular cloudS (GEMS). IX. Deuterated compounds of H2S in starless cores
• Deuterium fractionation in cold dense cores in the low-mass star forming region L1688
• Hunting pre-stellar cores with APEX: overview
• Gas-phase Elemental abundances in Molecular cloudS (GEMS) XI. The evolution of HCN, HNC, and N2H+ isotopic ratios in starless cores
• Chemical complexity in star formation induced by stellar feedback: cores shock-formed by the supernova remnant W44
• Post-Outburst Chemistry in a Very Low-Luminosity Object: Peculiar High Abundance of Nitric Oxide
• Deuterium fractionation and CO depletion in Barnard 5