S. Bottinelli
A5022838797- Astrophysics and Star Formation Studies
- Molecular Spectroscopy and Structure
- Atmospheric Ozone and Climate
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Advanced Chemical Physics Studies
- Astronomy and Astrophysical Research
- Calibration and Measurement Techniques
- Astrophysical Phenomena and Observations
- Spectroscopy and Laser Applications
- Galaxies: Formation, Evolution, Phenomena
- Thermodynamic properties of mixtures
- Advanced Combustion Engine Technologies
- Advanced Computational Techniques and Applications
- SAS software applications and methods
- Spectroscopy and Chemometric Analyses
- Spacecraft and Cryogenic Technologies
- Inertial Sensor and Navigation
- Solar and Space Plasma Dynamics
- Methane Hydrates and Related Phenomena
- Mineralogy and Gemology Studies
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Photoreceptor and optogenetics research
Centre National de la Recherche Scientifique
2010-2019
Université Toulouse III - Paul Sabatier
2010-2019
Université de Toulouse
2010-2019
Roche (France)
2010-2018
Institut de Recherche en Astrophysique et Planétologie
2013-2017
Laboratoire d'Analyse et d'Architecture des Systèmes
2010-2017
Observatoire Midi-Pyrénées
2014
Leiden University
2008-2011
Centre National d'Études Spatiales
2011
Roche (Switzerland)
2010
Ices regulate much of the chemistry during star formation and account for up to 80% available oxygen carbon. In this paper, we use Spitzer c2d ice survey, complimented with data sets on ices in cloud cores high-mass protostars, determine standard abundances present a coherent picture evolution low- formation. The median composition H2O:CO:CO2:CH3OH:NH3:CH4:XCN is 100:29:29:3:5:5:0.3 100:13:13:4:5:2:0.6 toward respectively, 100:31:38:4:-:-:- cores. low-mass sample, respect H2O CH4, NH3,...
With the goal to study physical and chemical evolution of ices in solar-mass systems, a spectral survey is conducted sample 41 low luminosity YSOs using 3-38 um Spitzer ground-based spectra. The long-known 6.0 6.85 bands are detected toward all sources, with Class 0-type showing deepest ever observed. In almost sources band deeper than expected from bending mode pure solid H2O. depth shape variations remaining 5-7 absorption indicate that it consists 5 independent components, which, by...
We report the detection of complex molecules (HCOOCH3, HCOOH, and CH3CN), signposts a hot core-like region, toward low-mass Class 0 source NGC 1333 IRAS 4A. This is second protostar in which such have been searched for reported, other being 16293-2422. It therefore likely that compact (a few tens AU) regions dense warm gas, where chemistry dominated by evaporation grain mantles are found, common sources. Given chemical formation timescale much shorter than gas hot-core crossing time, it not...
(Abridged) We aim to enlarge the number of known hot corinos and carry out a first comparative study with cores. The ultimate goal is understand whether complex organic molecules form in gas phase or on grain surfaces, what possible key parameters are. observed millimeter rotational transitions HCOOH, HCOOCH3, CH3OCH3, CH3CN, C2H5CN sample low-mass protostars IRAM-30m. Using diagram method coupled information about sources' structure, we calculate abundances molecules. To interpret these...
Gas-phase complex organic molecules have been detected toward a range of high- and low-mass star-forming regions at abundances which cannot be explained by any known gas-phase chemistry. Recent laboratory experiments show that UV irradiation CH3OH-rich ices may an important mechanism for producing releasing them into the gas phase. To test this ice formation scenario, we mapped B1-b dust core nearby protostar in CH3OH using IRAM 30 m telescope to identify locations efficient non-thermal...
Complex organic molecules have been observed for decades in the interstellar medium. Some of them might be considered as small bricks macromolecules at base terrestrial life. It is hence particularly important to understand chemistry Solar-like star forming regions. In this article, we present a new observational project: SOLIS (Seeds Of Life Space). This Large Project IRAM-NOEMA interferometer, and its scope image emission several crucial sample regions different evolutionary stage...
Context. Unbiased spectral surveys are powerful tools to study the chemistry and physics of star forming regions, because they can provide a complete census molecular content observed lines probe physical structure source.
Understanding how disks dissipate is essential to studies of planet formation. However, identifying exactly dust and gas dissipates complicated due difficulty in finding objects clearly the transition losing their surrounding material. We use Spitzer IRS spectra examine 35 photometrically-selected candidate cold (disks with large inner holes). The infrared are supplemented optical determine stellar accretion properties 1.3mm photometry measure disk masses. Based on detailed SED modeling, we...
Context. Water is a primordial species in the emergence of life, and comets may have brought large fraction to Earth form oceans. To understand evolution water from first stages star formation planets comets, HDO/H2O ratio powerful diagnostic.
Context. Modern versions of the Miller-Urey experiment claim that formamide (NH2CHO) could be starting point for formation metabolic and genetic macromolecules. Intriguingly, is indeed observed in regions forming solar-type stars external galaxies.
Subarcsecond images of the rotational line emissions CCH, CS, H2CO, and CH3OH have been obtained toward low-mass protostar IRAS 04368+2557 in L1527 as one early science projects Atacama Large Millimeter/submillimeter Array. The intensity distributions CCH CS show a double-peaked structure along edge-on envelope with dip position, whereas those H2CO are centrally peaked. By analyzing position–velocity diagrams envelope, found to reside mainly where gas is infalling conservation its angular...
Aims. We investigate the chemical relations between complex organics based on their spatial distributions and excitation conditions in low-mass young stellar objects IRAS 16293-2422 "A" "B".
High resolution line spectra of star-forming regions are mines information: they provide unique clues to reconstruct the chemical, dynamical, and physical structure observed source. We present first results from <i>Herschel<i/> key project "Chemical <i>HErschel<i/> Surveys Star forming regions", CHESS. report discuss observations towards five CHESS targets, one outflow shock spot four protostars with luminosities bewteen 20 2 × 10<sup>5<sup/> : L1157-B1, IRAS 16293-2422, OMC2-FIR4, AFGL...
We present the first results of unbiased survey L1157-B1 bow shock, obtained with HIFI in framework key program Chemical <i>HErschel<i/> Survey Star forming regions (CHESS). The L1157 outflow is driven by a low-mass Class 0 protostar and considered prototype so-called chemically active outflows. bright blue-shifted shock B1 ideal laboratory for studying link between hot (~1000–2000 K) component traced H<sub>2<sub/> IR-emission cold (~10–20 swept-up material. main aim to trace warm gas...
NH3 and CH3OH are key molecules in astrochemical networks leading to the formation of more complex N- O-bearing molecules, such as CH3CN CH3OCH3. Despite a number recent studies, little is known about their abundances solid state. This particularly case for low-mass protostars, which only launch Spitzer Space Telescope has permitted high-sensitivity observations ices around these objects. In this work, we investigate ∼8–10 μm region IRS (InfraRed Spectrograph) spectra 41 young stellar...
We report the first detection of chloronium, H$_2$Cl$^+$, in interstellar medium, using HIFI instrument aboard \emph{Herschel} Space Observatory. The $2_{12}-1_{01}$ lines ortho-H$_2^{35}$Cl$^+$ and ortho-H$_2^{37}$Cl$^+$ are detected absorption towards NGC~6334I, $1_{11}-0_{00}$ transition para-H$_2^{35}$Cl$^+$ is NGC~6334I Sgr~B2(S). H$_2$Cl$^+$ column densities compared to those chemically-related species HCl. derived HCl/H$_2$Cl$^+$ density ratios, $\sim$1--10, within range predicted by...
The interstellar delivery of carbon atoms locked into molecules might be one the key ingredients for emergence life. Cyanopolyynes are chains delimited at their two extremities by an atom hydrogen and a cyano group, so that they excellent reservoirs carbon. simplest member, HC3N, is ubiquitous in galactic medium found also external galaxies. Thus, understanding growth cyanopolyynes regions forming stars similar to our Sun, what affects it, particularly relevant. In framework IRAM/NOEMA Large...
<i>Aims. <i/> We identify a prominent absorption feature at 1115 GHz, detected in first HIFI spectra towards high-mass star-forming regions, and interpret its astrophysical origin. <i>Methods. The characteristic hyperfine pattern of the H<sub>2<sub/>O<sup>+<sup/> ground-state rotational transition, lack other known low-energy transitions this frequency range, identifies as against dust continuum background allows us to derive velocity profile absorbing gas. By comparing with profiles tracers...
The outflow driven by the low-mass class 0 protostar L1157 is prototype of so-called chemically active outflows. bright bowshock B1 in southern lobe a privileged testbed magneto-hydrodynamical (MHD) shock models, for which dynamical and chemical processes are strongly interdependent. We present first results unbiased spectral survey L1157-B1 bowshock, obtained framework key program "Chemical Herschel Surveys Star Forming Regions" (CHESS). main aim to trace warm enriched gas infer excitation...
Nitrogen is the fifth most abundant element in Universe, yet gas-phase chemistry of N-bearing species remains poorly understood. hydrides are key molecules nitrogen chemistry. Their abundance ratios place strong constraints on production pathways and reaction rates nitrogen-bearing molecules. We observed class 0 protostar IRAS16293-2422 with heterodyne instrument HIFI, covering frequency range from 0.48 to 1.78~THz at high spectral resolution. The hyperfine structure amidogen radical o-NH2...
We used the Atacama Large (sub-)Millimeter Array (ALMA) and IRAM Plateau de Bure Interferometer (PdBI) to image, with an angular resolution of 0.5$''$ (120 au) 1$''$ (235 au), respectively, emission from 11 different organic molecules in protostellar binary NGC1333 IRAS 4A. clearly disentangled A1 A2, two cores present. For first time, we were able derive column densities fractional abundances simultaneously for objects, allowing us analyse chemical differences between them. Molecular is...