A5020916055- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- High-pressure geophysics and materials
- Atmospheric Ozone and Climate
- Diamond and Carbon-based Materials Research
- Gamma-ray bursts and supernovae
- Molecular Spectroscopy and Structure
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Atomic and Molecular Physics
- History and Developments in Astronomy
- Spectroscopy and Laser Applications
- Fullerene Chemistry and Applications
- Space Exploration and Technology
- Astrophysics and Cosmic Phenomena
- Laser-induced spectroscopy and plasma
- Planetary Science and Exploration
- Advanced Chemical Physics Studies
- Geological and Geochemical Analysis
- Atmospheric chemistry and aerosols
- Phase Equilibria and Thermodynamics
- Adaptive optics and wavefront sensing
Centre National de la Recherche Scientifique
2015-2024
Institut d'Astrophysique Spatiale
2015-2024
Université Paris-Saclay
2015-2024
Université Paris-Sud
2015-2024
Australian National University
2005-2023
East London NHS Foundation Trust
2022-2023
UNSW Sydney
2023
Institute of Electrical and Electronics Engineers
2023
The University of Queensland
2023
Queensland University of Technology
2023
view Abstract Citations (585) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Grain Shattering in Shocks: The Interstellar Size Distribution Jones, A. P. ; Tielens, G. M. Hollenbach, D. J. We have studied the effects of shattering grain-grain collisions. Based upon extensive numerical simulation surface explosions and impacts, an analytical model has been developed which relates final crater mass fragment size distribution to relative...
view Abstract Citations (448) References (35) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Grain Destruction in Shocks the Interstellar Medium Jones, A. P. ; Tielens, G. M. Hollenbach, D. J. McKee, C. F. of interstellar dust occurs predominantly supernova shock waves warm neutral/ionized medium (density approximately = 0.25/cu cm, temperature 104 K). Recent theoretical developments and laboratory data for sputtering processes grain-grain collisional...
Context. The evolution of amorphous hydrocarbon materials, a-C(:H), principally resulting from ultraviolet (UV) photon absorption- induced processing, are likely at the heart variations in observed properties dust interstellar medium. Aims. consequences size-dependent and compositional aliphatic-rich a-C:H to aromatic-rich a-C, studied within context extinction emission. Methods. Newly-derived optical property data for a-C(:H) combined with that an forsterite-type silicate iron nano-particle...
The Planck and Herschel missions are currently measuring the far-infrared to millimeter emission of dust, which combined with existing IR data, will for first time provide full spectral energy distribution (SED) galactic interstellar medium dust emission, from mid-IR mm range, an unprecedented sensitivity down spatial scales ~30″. Such a global SED allow systematic study evolution processes (e.g. grain growth or fragmentation) that directly affect because they redistribute mass among...
This paper analyses the behaviour of gas-to-dust mass ratio (G/D) local Universe galaxies over a large metallicity range. We combine three samples: Dwarf Galaxy Survey, KINGFISH survey and subsample from Galametz et al. (2011) totalling 126 galaxies, covering 2 dex range, with 30% sample 12+log(O/H) < 8.0. The dust masses are homogeneously determined semi-empirical model, including submm constraints. atomic molecular gas compiled literature. Two XCO used to estimate masses: Galactic XCO,...
Here we introduce the interstellar dust modelling framework THEMIS (The Heterogeneous Evolution Model for Interstellar Solids), which takes a global view of and its evolution in response to local conditions media. This approach is built upon core model that was developed explain extinction emission diffuse medium. The then further self-consistently include effects transition denser regions. under continuous development currently are extending explore implications HII regions photon-dominated...
This article gives an overview of the constitution, physical conditions and observables dust in interstellar medium nearby galaxies. We first review macroscopic, spatial distribution these objects, its consequence on our ability to study grain physics. also discuss possibility use tracers as diagnostic tools. then survey current understanding microscopic, intrinsic properties different environments, derived from observables: emission, extinction, polarization, depletions, over whole...
Context . Recent observational constraints in emission, extinction, and polarisation have at least partially invalidated most of the astronomical standard grain models for diffuse interstellar medium. Moreover, laboratory measurements on silicate analogues shown quite significant differences with optical properties used these models. Aims To address issues, our objective is twofold: (i) to update silicates (ii) develop The Heterogeneous dust Evolution Model Interstellar Solids (THEMIS) allow...
We present submillimetre observations obtained using the balloon-borne experiment PRONAOS/SPM, from 200 to 600 μm with an angular resolution of 2–3.5′, a quiescent dense filament (typically ) in Taurus molecular complex. This filament, like many other clouds, presents deficit its IRAS flux ratio comparison diffuse interstellar medium. show, combination PRONAOS/SPM and data, that, inside there is no evidence for emission transiently heated small particles responsible 60 emission, that...
We present the results of a systematic study mid-IR spectra Galactic regions, Magellanic HII and galaxies various types (dwarf, spiral, starburst), observed by satellites ISO Spitzer. relative variations 6.2, 7.7, 8.6 11.3 micron features inside spatially resolved objects (such as M82, M51, 30 Doradus, M17 Orion Bar), well among 90 integrated 50 objects. Our main are that 7.7 bands essentially tied together, while ratios between these band varies one order magnitude. This implies properties...
We present new ISOCAM mid-infrared spectra of three starbursting nearby dwarf galaxies, NGC1569, NGC1140 and IIZw40 the 30Dor region LMC explore properties ISM in low-metallicity environments, also using additional sources from literature. analyse various components probed by observations compare them with other Galactic extragalactic objects. The MIR starburst are dominated [ Ne iii] S iv] lines, as well a steeply rising dust continuum. PAH bands generaly faint, both locally averaged over...
Context: PAHs appear to be an ubiquitous interstellar dust component but the effects of shocks waves upon them have never been fully investigated. Aims: To study energetic (~0.01-1 keV) ion (H, He and C) electron collisions on in shock waves.Methods: We calculate ion-PAH electron-PAH nuclear electronic interactions, above threshold for carbon atom loss from a PAH, 50-200 km/s warm intercloud medium. Results: Interstellar (Nc = 50) do not survive with velocities greater than 100 larger 200)...
We present new ISOCAM mid-infrared spectra of three starbursting nearby dwarf galaxies, NGC1569, IIZw40, NGC1140 and the 30Dor region LMC explore properties ISM in low-metallicity environments, also using additional sources from literature. analyse various components probed by observations compare them with other Galactic extragalactic objects. The MIR starburst are dominated [NeIII] [SIV] lines, as well a steeply rising dust continuum. PAH bands generaly faint, both locally averaged over...
Dusty hyperluminous galaxies in the early universe provide unique environments for studying role of massive stars formation and destruction dust. At redshifts above ~6, when was less than ~1 Gyr old, dust could have only condensed explosive ejecta Type II supernovae (SNe), since most progenitors asymptotic giant branch stars, major alternative source interstellar dust, did not time to evolve off main sequence onset star formation. In this paper we present analytical models evolution gas,...
Context. There is a long-standing conundrum in interstellar dust studies relating to the discrepancy between time-scales for formation from evolved stars and apparently more rapid destruction supernova-generated shock waves.
The gas-to-dust mass ratios found for interstellar dust within the solar system, versus values determined astronomically cloud around suggest that large and small grains have separate histories preferentially detected by spacecraft are not formed exclusively exchange with nearby gas. Observations Ulysses Galileo satellites of spectrum flux rate heliosphere combined information about density, composition, relative flow speed direction gas in surrounding system to derive an situ value ratio,...
We present new 450 and 850 SCUBA data 1.3 mm MAMBO of the dwarf galaxies II Zw 40, He 2-10 NGC 1140. Additional ISOCAM, IRAS as well ground based are used to construct observed mid-infrared millimeter spectral energy distribution these galaxies. These distributions modeled in a self-consistent way, was achieved with 1569 (Galliano et al. 2003, A&A, 407, 159), synthesizing both global stellar radiation field dust emission, further constraints provided by photoionisation gas. Our study shows...
Planck allows unbiased mapping of Galactic sub-millimetre and millimetre emission from the most diffuse regions to densest parts molecular clouds. We present an early analysis Taurus complex, on line-of-sight-averaged data without component separation. The spectrum measured by IRAS can be fitted pixel using a single modified blackbody. Some systematic residuals are detected at 353 GHz 143 GHz, with amplitudes around -7 % +13 %, respectively, indicating that spectra likely more complex than...
This paper presents the first results from a comparison of Planck dust maps at 353, 545 and 857GHz, along with IRAS data 3000 (100 μm) 5000GHz (60 μm), Green Bank Telescope 21-cm observations Hi in 14 fields covering more than 800deg2 high Galactic latitude. The main goal this study is to estimate far-infrared sub-millimeter (submm) emissivity diffuse local interstellar medium (ISM) intermediate-velocity (IVC) high-velocity clouds (HVC) halo. emission for average column density lower 2 ×...
The dust-HI correlation is used to characterize the emission properties of dust in diffuse interstellar medium. We cross-correlate sky maps from Planck, WMAP, and DIRBE, at 17 frequencies 23 3000 GHz, with Parkes survey 21-cm line neutral atomic hydrogen, over a contiguous area 7500 deg$^2$ centred on southern Galactic pole. Our analysis yields four specific results. (1) temperature observed be anti-correlated emissivity opacity. interpret this result as evidence for evolution within ISM....
Aims. In this work, we aim to provide a consistent analysis of the dust properties from metal-poor metal-rich environments by linking them fundamental galactic parameters.
We describe the Herschel Virgo Cluster Survey (HeViCS) and first data obtained as part of Science Demonstration Phase (SDP). The cover a central 4x4 sq deg region cluster. use SPIRE PACS photometry to produce 100, 160, 250, 350 500 micron luminosity functions (LFs) for optically bright galaxies that are selected at detected in all bands. compare these LFs with those previously derived using IRAS, BLAST Herschel-ATLAS data. do not have large numbers faint or examples very luminous seen...
Context. Variations in the observed dust emission and extinction indicate a systematic evolution of grain properties transition from diffuse interstellar medium (ISM) to denser molecular clouds.