A5070650240- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Molecular Spectroscopy and Structure
- Astronomy and Astrophysical Research
- Atmospheric Ozone and Climate
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Advanced Combustion Engine Technologies
- Spectroscopy and Laser Applications
- Astrophysical Phenomena and Observations
- Atomic and Molecular Physics
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- Solar and Space Plasma Dynamics
- Calibration and Measurement Techniques
- Advanced Chemical Physics Studies
- Distributed and Parallel Computing Systems
- Advanced Data Storage Technologies
- Phase Equilibria and Thermodynamics
- Sensor Technology and Measurement Systems
- Space Exploration and Technology
- Scientific Computing and Data Management
- Earthquake Detection and Analysis
- Astrophysics and Cosmic Phenomena
Institute for Space Astrophysics and Planetology
2016-2025
National Institute for Astrophysics
2015-2025
Astronomical Observatory of Rome
2015-2023
European Space Astronomy Centre
2014
Max Planck Institute for Astrophysics
2012
Park University
2011
University of Lisbon
2009-2010
University of Salento
2002-2010
Institute of Astrophysics and Space Sciences
2010
Institut d'Astrophysique Spatiale
2010
We present the first results from science demonstration phase for Hi-GAL survey, <i>Herschel<i/> key program that will map inner Galactic plane of Milky Way in 5 bands. outline our data reduction strategy and some highlights on two observed 2° × tiles approximately centered at <i>l<i/> = 30° 59°. The regions are extremely rich intense highly structured extended emission which shows a widespread organization filaments. Source SEDs can be built hundreds objects fields, physical parameters...
Hi-GAL, the Herschel infrared Galactic Plane Survey, is an Open Time Key Project of Space Observatory. It will make unbiased photometric survey inner plane by mapping a 2° wide strip in longitude range ∣l∣ < 60° five wavebands between 70 μm and 500 μm. The aim Hi-GAL to detect earliest phases formation molecular clouds high-mass stars use optimum combination wavelength coverage, sensitivity, strategy, speed deliver homogeneous census star-forming regions cold structures interstellar medium....
We present first results from the Herschel Gould Belt survey for B211/L1495 region in Taurus molecular cloud. Thanks to their high sensitivity and dynamic range, images reveal structure of dense, star-forming filament B211 with unprecedented detail, along presence striations perpendicular generally oriented magnetic field direction as traced by optical polarization vectors. Based on column density dust temperature maps derived data, we find that radial profile approaches a power-law behavior...
For many years feedback processes generated by OB-stars in molecular clouds, including expanding ionization fronts, stellar winds, or UV-radiation, have been proposed to trigger subsequent star formation. However, hydrodynamic models radiation and gravity show that UV-illumination has little no impact on the global dynamical evolution of cloud. The Rosette cloud, irradiated NGC2244 cluster, is a template region for triggered star-formation, we investigated its spatial density structure...
Thermal images of cold dust in the Central Molecular Zone Milky Way, obtained with far-infrared cameras on board Herschel satellite, reveal a ∼3 × 107 M☉ ring dense and clouds orbiting Galactic center. Using simple toy model, an elliptical shape having semi-major axes 100 60 pc is deduced. The major axis this inclined by about 40° respect to plane sky oriented perpendicular Bar. appears trace system stable x2 orbits predicted for barred potential. Sgr A⋆ displaced geometrical center symmetry...
The conversion of gas into stars is a fundamental process in astrophysics and cosmology. Stars are known to form from the gravitational collapse dense clumps interstellar molecular clouds, it has been proposed that resulting star formation rate proportional either amount mass above threshold surface density, or volume density. These star-formation prescriptions appear hold nearby clouds our Milky Way Galaxy's disk as well distant galaxies where rates often much larger. inner 500 pc Galaxy,...
(Abridged) We present the first public release of high-quality data products (DR1) from Hi-GAL, {\em Herschel} infrared Galactic Plane Survey. Hi-GAL is keystone a suite continuum surveys near-IR to radio, and covers five wavebands at 70, 160, 250, 350 500 micron, encompassing peak spectral energy distribution cold dust for 8 < T 50K. This inner Milky Way in longitude range 68{\deg} > l -70{\deg} |b|<1{\deg} latitude strip. Photometric maps have been produced with ROMAGAL pipeline, that...
We present the first Herschel PACS and SPIRE results of Vela C molecular complex in far-infrared submillimetre regimes at 70, 160, 250, 350, 500 um, spanning peak emission cold prestellar or protostellar cores. Column density multi-resolution analysis (MRA) differentiates into five distinct sub-regions. Each sub-region displays differences their column temperature probability distribution functions (PDFs), particular, PDFs `Centre-Ridge' `South-Nest' sub-regions appear stark contrast to each...
Hi-GAL is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 $\mu$m. We present band-merged catalogue spatially matched sources their properties derived from fits to spectral energy distributions (SEDs) heliocentric distances, based on photometric catalogs presented Molinari et al. (2016a), covering portion plane $-71.0^{\circ}< \ell < 67.0^{\circ}$. The contains 100922 regular SED, 24584 which show $\mu$m counterpart are...
In order to characterise the cloud structures responsible for formation of high-mass stars, we present Herschel observations DR21 environment. Maps column density and dust temperature unveil structure ridge several connected filaments. The has densities higher than 1023 cm-2 over a region 2.3 pc2. It shows substructured profiles branches into two major filaments in north. masses range between 130 1400 M⊙, whereas mass is 15 000 M⊙. accretion these onto ridge, suggested by previous molecular...
We present a catalogue of dense cores in ∼4° × 2° field the Taurus star-forming region, inclusive L1495 cloud, derived from Herschel SPIRE and PACS observations 70 μm, 160 250 350 500 μm continuum bands. Estimates mean dust temperature total mass are using modified blackbody fits to spectral energy distributions. detect 525 starless which ∼10–20 per cent gravitationally bound therefore presumably prestellar. Our census unbound objects is ∼85 complete for M > 0.015 M⊙ low-density regions (AV...
We describe new Hi-GAL based maps of the entire Galactic Plane, obtained using continuum data in wavelength range 70–500 μm. These are derived with PPMAP procedure, and therefore represent a significant improvement over those standard analysis techniques. Specifically they have greatly improved resolution (12 arcsec) and, addition to more accurate integrated column densities mean dust temperatures, give temperature-differential densities, i.e., separate density twelve distinct temperature...
We present Herschel survey maps of the L 1641 molecular clouds in Orion A. extracted both filaments and dense cores region. identified which sources are proto- or pre-stellar, studied their association with filaments. find that although most (71%) pre-stellar located on there, is still a significant fraction not associated such structures. these two populations (on off filaments) have distinctly different mass distributions. The distribution found to peak at 4 M☉ drives shape core function...
We present the first Herschel PACS and SPIRE photometric observations in a portion of outer Galaxy ($216.5^{\circ} \lesssim \ell 225.5^{\circ}$ $-2^{\circ} b 0^{\circ}$) as part Hi-GAL survey. The maps between 70 500 $\mu$m, derived column density temperature maps, compact source catalog are presented. NANTEN CO(1-0) line used to derive cloud kinematics distances, so that we can estimate distance-dependent physical parameters sources (cores clumps) having reliable spectral energy...
We present the $360^\circ$ catalogue of physical properties Hi-GAL compact sources, detected between 70 and 500 $\mu$m. This release not only completes analogous previously produced by collaboration for $-71^\circ \lesssim \ell 67^\circ$, but also meaningfully improves it thanks to a new set heliocentric distances, 120808 in total. About third 150223 entries are located newly added portion Galactic plane. A first classification based on detection at $\mu$m as signature ongoing star-forming...
Abstract We present a new derivation of the Milky Way’s current star formation rate (SFR) based on data Herschel InfraRed Galactic Plane Survey (Hi-GAL). estimate distribution SFR across plane from star-forming clumps identified in Hi-GAL survey and calculate total sum their contributions. The global amounts to 2.0 ± 0.7 M ⊙ yr −1 , which 1.7 0.6 coming with reliable heliocentric distance assignment. This value is general agreement estimates found literature last decades. profile density...
Abstract Three methods for computing the total star formation rate (SFR) of Milky Way agree well with a reference value 1.65 ± 0.19 M ⊙ yr −1 . They are then used to determine radial dependence SFR and face-on map Way. First, method based on model in Hi-GAL-defined dense clumps, adjusted an increase gas-to-dust ratio Galactocentric radius, predicts 0.61 Second, using 70 μ m emission, commonly other galaxies, technique assign distances extended <mml:math...
We report far-IR Herschel observations obtained between 70 $\mu$m and 500 of two star-forming dusty condensations, B1-bS B1-bN, in the B1 region Perseus cloud. In Western part cloud, is only source detected all 6 PACS SPIRE photometric bands without being visible Spitzer map at 24 $\mu$m. B1-bN clearly 100 250 have fitted spectral energy distributions these sources to derive their physical properties, find that a simple greybody model fails reproduce observed SEDs. At least two-component...
A growing body of evidence indicates that the formation filaments in interstellar clouds is a key component star process. In this paper, we present new Herschel PACS and SPIRE observations B59 Stem regions Pipe Nebula complex, revealing rich, organized network filaments. The asymmetric column density profiles observed for several filaments, along with bow-like edge B59, being compressed from its western side, most likely by winds nearby Sco OB2 association. We suggest compressive flow has...
The whole of the Taurus region (a total area 52 sq. deg.) has been observed by Herschel SPIRE and PACS instruments at wavelengths 70, 160, 250, 350 500 {\mu}m as part Gould Belt Survey. In this paper we present first results from that includes Barnard 18 L1536 clouds. A new source-finding routine, Cardiff Source-finding AlgoRithm (CSAR), is introduced, which loosely based on CLUMPFIND, but also generates a structure tree, or dendrogram, can be used to interpret hierarchical clump in complex...
Aims. Fundamental to any theory of high-mass star formation are gravity and turbulence. Their relative importance, which probably changes during cloud evolution, is not known. By investigating the spatial density structure star-forming complex NGC 6334 we aim disentangle contributions turbulence gravity.
We use PACS and SPIRE continuum data at 160 μm, 250 350 500 μm from the Herschel Gould Belt Survey to sample seven clumps in Perseus: B1, B1-E, B5, IC 348, L1448, L1455, NGC 1333. Additionally, we identify characterize embedded Class 0 protostars using detections of compact sources 70 as well archival Spitzer catalogs SCUBA 850 photometric data. 28 candidate protostars, four which are newly discovered not identified with Spitzer. find that star formation efficiency clumps, traced by...
Observations of molecular clouds reveal a complex structure, with gas and dust often arranged in filamentary rather than spherical geometries. The associations pre- proto- stellar cores the filaments suggest direct link process star formation. Any study properties such requires representative samples from different enviroments so an unbiased detection method. We developed approach using Hessian matrix surface-brightness distribution to identify determine their physical morphological...
The present study aims at characterizing the massive star forming region G35.20N, which is found associated with least one outflow and contains multiple dense cores, of them recently a Keplerian rotating disk. We used ALMA to observe G35.20N in continuum line emission 350 GHz. observed frequency range covers tracers gas (e.g. H13CO+, C17O), molecular outflows SiO), hot cores CH3CN, CH3OH). 870 um map reveals an elongated dust structure (0.15 pc long 0.013 wide) perpendicular large-scale...