Search Results - "Wakelam, V."

FROM PRESTELLAR TO PROTOSTELLAR CORES. II. TIME DEPENDENCE AND DEUTERIUM FRACTIONATION by AIKAWA, Y, WAKELAM, V, HERSANT, F, GARROD, R. T, HERBST, E

“…We investigate the molecular evolution and D/H abundance ratios that develop as star formation proceeds from a dense molecular cloud core to a protostellar…”
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Modelling complex organic molecules in dense regions: Eley–Rideal and complex induced reaction by Ruaud, M, Loison, J C, Hickson, K M, Gratier, P, Hersant, F, Wakelam, V

“…Recent observations have revealed the existence of complex organic molecules (COMs) in cold dense cores and pre-stellar cores. The presence of these molecules…”
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Predictions of gas-phase methanimine (CH2NH) abundance in cold cores by Luthra, H, Wakelam, V, Sharma, M K, Chandra, S

“…ABSTRACT Since the 1930s, more than 250 molecules have been discovered in the interstellar medium. With the development of more sensitive telescopes, we keep…”
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CHEMICAL AND PHYSICAL CHARACTERIZATION OF COLLAPSING LOW-MASS PRESTELLAR DENSE CORES by Hincelin, U., Commerçon, B., Wakelam, V., Hersant, F., Guilloteau, S., Herbst, E.

“…ABSTRACT The first hydrostatic core, also called the first Larson core, is one of the first steps in low-mass star formation as predicted by theory. With…”
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Grain-surface reactions in molecular clouds: the effect of cosmic rays and quantum tunnelling by Reboussin, L., Wakelam, V., Guilloteau, S., Hersant, F.

“…Grain-surface reactions play an essential role in interstellar chemistry, since dust grain catalyzes reactions at its surface allowing for the formation of…”
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Polysulphanes on interstellar grains as a possible reservoir of interstellar sulphur by Druard, C., Wakelam, V.

“…Abstract The form of depleted sulphur in dense clouds is still unknown. Until now, only two molecules, OCS and SO2, have been detected in interstellar ices but…”
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Sulphur chemistry in the L1544 pre-stellar core by Vastel, Charlotte, Quénard, D, Le Gal, R, Wakelam, V, Andrianasolo, A, Caselli, P, Vidal, T, Ceccarelli, C, Lefloch, B, Bachiller, R

“…ABSTRACT The L1544 pre-stellar core has been observed as part of the ASAI IRAM 30 m Large Program as well as follow-up programs. These observations have…”
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SURVIVAL OF INTERSTELLAR MOLECULES TO PRESTELLAR DENSE CORE COLLAPSE AND EARLY PHASES OF DISK FORMATION by HINCELIN, U, Wakelam, V, Commercon, B, Hersant, F, Guilloteau, S

“…An outstanding question of astrobiology is the link between the chemical composition of planets, comets, and other solar system bodies and the molecules formed…”
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LEGO – II. A 3 mm molecular line study covering 100 pc of one of the most actively star-forming portions within the Milky Way disc by Barnes, A T, Kauffmann, J, Bigiel, F, Brinkmann, N, Colombo, D, Guzmán, A E, Kim, W J, Szűcs, L, Wakelam, V, Aalto, S, Albertsson, T, Evans, N J, Glover, S C O, Goldsmith, P F, Kramer, C, Menten, K, Nishimura, Y, Viti, S, Watanabe, Y, Weiss, A, Wienen, M, Wiesemeyer, H, Wyrowski, F

“…ABSTRACT The current generation of (sub)mm-telescopes has allowed molecular line emission to become a major tool for studying the physical, kinematic, and…”
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A fast neural emulator for interstellar chemistry by Ramos, A Asensio, Plaza, C Westendorp, Navarro-Almaida, D, Rivière-Marichalar, P, Wakelam, V, Fuente, A

“…ABSTRACT Astrochemical models are important tools to interpret observations of molecular and atomic species in different environments. However, these models…”
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3D modelling of HCO+ and its isotopologues in the low-mass proto-star IRAS16293−2422 by Quénard, D, Bottinelli, S, Caux, E, Wakelam, V

“…Abstract Ions and electrons play an important role in various stages of the star formation process. By following the magnetic field of their environment and…”
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A study of singly deuterated cyclopropenylidene c-C3HD in the protostar IRAS 16293–2422 by Majumdar, L., Gratier, P., Andron, I., Wakelam, V., Caux, E.

“…Abstract Cyclic-C3HD (c-C3HD) is a singly deuterated isotopologue of c-C3H2, which is one of the most abundant and widespread molecules in our Galaxy. We…”
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Influence of galactic arm scale dynamics on the molecular composition of the cold and dense ISM – II. Molecular oxygen abundance by Wakelam, V, Ruaud, M, Gratier, P, Bonnell, I A

“…ABSTRACT Molecular oxygen has been the subject of many observational searches as chemical models predicted it to be a reservoir of oxygen. Although it has been…”
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Detection of CH3SH in protostar IRAS 16293-2422 by Majumdar, Liton, Gratier, P., Vidal, Thomas, Wakelam, Valentine, Loison, Jean-Christophe, Hickson, Kevin M., Caux, Emmanuel

“…The nature of the main sulphur reservoir in star forming regions is a long standing mystery. The observed abundance of sulphur-bearing species in dense clouds…”
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Protoplanetary discs: sensitivity of the chemical composition to various model parameters by Wakelam, V, Chapillon, E, Dutrey, A, Guilloteau, S, Iqbal, W, Coutens, A, Majumdar, L

“…Protoplanetary disks are challenging objects for astrochemical models due to strong density and temperature gradients and due to the UV photons 2D propagation…”
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Detection of HOCO+ in the protostar IRAS 16293−2422 by Majumdar, L, Gratier, P, Wakelam, V, Caux, E, Willacy, K, Ressler, M E

“…Abstract The protonated form of CO2, HOCO+, is assumed to be an indirect tracer of CO2 in the millimeter/submillimeter regime since CO2 lacks a permanent…”
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Chemical modelling of water deuteration in IRAS16293-2422 by Wakelam, V., Vastel, C., Aikawa, Y., Coutens, A., Bottinelli, S., Caux, E.

“…IRAS 16293-2422 is a well-studied low-mass protostar characterized by a strong level of deuterium fractionation. In the line of sight of the protostellar…”
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Methyl isocyanate (CH3NCO): an important missing organic in current astrochemical networks by Majumdar, L, Loison, J-C, Ruaud, M, Gratier, P, Wakelam, V, Coutens, A

“…Abstract Methyl isocyanate (CH3NCO) is one of the important complex organic molecules detected on the comet 67P/Churyumov–Gerasimenko by Rosetta’s Philae…”
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SiS Formation in the Interstellar Medium through Si+SH Gas-phase Reactions by Mota, V. C., Varandas, A. J. C., Mendoza, E., Wakelam, V., Galvão, B. R. L.

“…Abstract Silicon monosulfide is an important silicon-bearing molecule detected in circumstellar envelopes and star-forming regions. Its formation and…”
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The Hot Core around the Low-Mass Protostar IRAS 16293–2422: Scoundrels Rule by Cazaux, S, Tielens, A. G. G. M, Ceccarelli, C, Castets, A, Wakelam, V, Caux, E, Parise, B, Teyssier, D

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