A5038604752- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Atmospheric Ozone and Climate
- Calibration and Measurement Techniques
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astro and Planetary Science
- Molecular Spectroscopy and Structure
- Astronomical Observations and Instrumentation
- History and Developments in Astronomy
- Spectroscopy and Laser Applications
- Adaptive optics and wavefront sensing
- Astrophysics and Cosmic Phenomena
- Atomic and Molecular Physics
- Infrared Target Detection Methodologies
- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Particle Accelerators and Free-Electron Lasers
- Atmospheric and Environmental Gas Dynamics
- Advanced Chemical Physics Studies
- Meteorological Phenomena and Simulations
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
Rutherford Appleton Laboratory
2008-2023
Science and Technology Facilities Council
2009-2021
Instituto de Ciencia de Materiales de Madrid
2014-2016
Centro de Astrobiología
2012-2015
The Open University
2008-2015
Consejo Superior de Investigaciones Científicas
2012-2013
Instituto Nacional de Técnica Aeroespacial
2012
Center for Astrophysics Harvard & Smithsonian
2011
Abstract The Mid-Infrared Instrument (MIRI) extends the reach of James Webb Space Telescope (JWST) to 28.5 μ m. It provides subarcsecond-resolution imaging, high sensitivity coronagraphy, and spectroscopy at resolutions λ /Δ ∼ 100–3500, with high-resolution mode employing an integral field unit provide spatial data cubes. resulting broad suite capabilities will enable huge advances in studies over this wavelength range. This overview describes history acquiring capability for JWST. discusses...
We report on our observations of the 79 and 119um doublet transitions OH for 24 local (z<0.262) ULIRGs observed with Herschel-PACS as part Herschel ULIRG Survey (HERUS). Some OH119 profiles display a clear P-Cygni shape therefore imply outflowing gas, other are predominantly in absorption or completely emission. find that relative strength emission component decreases silicate increases. This locates outflows inside obscured nuclei. The maximum outflow velocities sources range from less than...
We present the first ~7.5'×11.5' velocity-resolved (~0.2 km s-1) map of [C ii] 158 μm line toward Orion molecular cloud 1 (OMC 1) taken with Herschel/HIFI instrument. In combination far-infrared (FIR) photometric images and maps H41α hydrogen recombination CO J=2-1 lines, this data set provides an unprecedented view intricate small-scale kinematics ionized/PDR/molecular gas interfaces radiative feedback from massive stars. The main contribution to luminosity (~85 %) is extended,...
Abstract We present a far-infrared all-sky atlas from sensitive survey using the Japanese AKARI satellite. The covers &gt; 99% of sky in four photometric bands centred at 65 μm, 90 140 and 160 with spatial resolutions ranging 1′ to 1${^{\prime\prime}_{.}}$5. These data provide crucial information on investigation characterisation properties dusty material interstellar medium (ISM), since significant portion its energy is emitted between ∼ 50 200 μm. large-scale distribution clouds, their...
The rho Oph molecular cloud is undergoing intermediate-mass star formation. UV radiation from its hottest young stars heats and dissociates exposed layers, but does not ionize hydrogen. Only faint the Rayleigh-Jeans tail of ~10-100K dust expected at wavelengths longwards 3mm. Yet Cosmic Background Imager (CBI) observations reveal that W photo-dissociation region (PDR) surprisingly bright centimetre wavelengths. We searched for interpretations consistent with WMAP radio spectrum, new ISO-LWS...
The Gould Belt Legacy Survey will survey nearby star-forming regions (within 500 pc), using HARP (Heterodyne Array Receiver Programme), SCUBA-2 (Submillimetre Common- User Bolometer 2) and POL-2 (Polarimeter on the James Clerk Maxwell Telescope (JCMT). This paper describes initial data obtained to observe 12CO, 13CO C18O J = 3 - 2 towards two in Orion B, NGC 2024 2071. We describe physical characteristics of clouds, calculating temperatures opacities utilizing all three isotopologues. find...
We present the first complete 55-671 um spectral scan of a low-mass Class 0 protostar (Serpens SMM1) taken with PACS and SPIRE spectrometers on board Herschel. More than 145 lines have been detected, most them rotationally excited 12CO (full ladder from J=4-3 to 42-41), H2O, OH, 13CO, HCN HCO+ . Bright [OI]63,145um weaker [CII]158 [CI]370,609um are also detected. Mid-IR spectra retrieved Spitzer archive discussed here, they show clear detections [NeII], [FeII], [SiII] [SI] fine structure as...
Sagittarius B2 (Sgr B2) is one of the most massive and luminous star-forming regions in Galaxy shows chemical physical conditions similar to those distant extragalactic starbursts. We present large-scale far-IR/submm photometric images spectroscopic maps taken with PACS SPIRE instruments onboard Herschel. The spectra towards Sgr cores, B2(M) B2(N), are characterized by strong CO line emission, emission lines from high-density tracers (HCN, HCO+, H2S), [N II] 205 um ionized gas, absorption...
The Gould Belt Legacy Survey will map star-forming regions within 500 pc, using HARP (Heterodyne Array Receiver Programme), SCUBA-2 (Submillimetre Common-User Bolometer 2) and POL-2 (Polarimeter on the James Clerk Maxwell Telescope (JCMT). This paper describes observations of J = 3-2 transitions 13CO C18O towards Orion A. 1500-resolution cover 5 pc filament, including OMC1 (inc. BN-KL Bar), OMC 2/3 4, allow a comparative study molecular gas properties throughout cloud. filament shows...
We present a ∼52–671 μm spectral scan toward Sgr A* taken with the PACS and SPIRE spectrometers on board Herschel. The achieved angular resolution allows us to separate, for first time at far-IR wavelengths, emission central cavity (gas in inner parsec of galaxy) from that surrounding circumnuclear disk. spectrum is dominated by strong [O iii], i], [C ii], [N i] fine-structure lines (in decreasing order luminosity) arising gas irradiated UV photons stellar cluster. In addition, rotationally...
We analyse the far infrared dust emission from Galactic Centre region, including Circumnuclear Disk (CND) and other structures, using Herschel PACS SPIRE photometric observations. These data are complemented by unpublished observations Infrared Space Observatory Long Wavelength Spectrometer (ISO LWS), which used parallel mode scans to obtain images of region with a larger beam than but complementary wavelength coverage more frequent sampling ten detectors observing at different wavelengths...
CO, 13CO, and C18O J = 3–2 observations are presented of the Ophiuchus molecular cloud. The 13CO emission is dominated by Oph A clump, B1, B2, C, E, F, regions. optically thin(ner) line used as a column density tracer, from which gravitational binding energy estimated to be 4.5 × 1039 (2282 M⊙ km2 s−2). turbulent kinetic 6.3 1038 (320 s−2), or seven times less than this, therefore cloud whole gravitationally bound. 30 protostars were searched for high-velocity gas, with 8 showing outflows,...
The Gould Belt Legacy Survey on the James Clerk Maxwell Telescope's has observed a region of 260 arcmin2 in 12CO J= 3 → 2 emission, and 190 subset this 13CO C18O towards Serpens molecular cloud. We examine global velocity structure non-outflowing gas, calculate excitation temperatures opacities. large-scale mass energetics are evaluated, with special consideration for high-velocity gas. find cloud to have 203 M⊙, be gravitationally bound, that kinetic energy outflowing gas is approximately...
The Spectral and Photometric Imaging Receiver (SPIRE) on the European Space Agency's Herschel Observatory utilizes a pioneering design for its imaging spectrometer in form of Fourier Transform Spectrometer (FTS). standard FTS data reduction calibration schemes are aimed at objects with either spatial extent much larger than beam size or source that can be approximated as point within beam. However, when sources intermediate extent, neither these calibrations is appropriate both response...
The rate constants required to model the OH$^+$ observations in different regions of interstellar medium have been determined using state art quantum methods. First, state-to-state for H$_2(v=0,J=0,1)$+ O$^+$($^4S$) $\rightarrow$ H + OH$^+(X ^3\Sigma^-, v', N)$ reaction obtained a wave packet method. calculations compared with time-independent results asses accuracy probabilities at collision energies about 1 meV. good agreement between simulations and existing experimental cross sections...
We present Herschel photometry and spectroscopy, carried out as part of the ULIRG survey (HERUS), a model for infrared to submillimetre emission ultraluminous galaxy IRAS 08572+3915. This source shows one deepest known silicate absorption features no polycyclic aromatic hydrocarbon (PAH) emission. The suggests that this object is powered by an active galactic nucleus (AGN) with fairly smooth torus viewed almost edge-on very young starburst. According our AGN contributes about 90% total...
We present ~2'x2' spectral-maps of Orion BN/KL outflows taken with Herschel at ~12'' resolution. For the first time in far-IR domain, we spatially resolve emission associated bright H2 shocked regions "Peak 1" and 2" from that Hot Core ambient cloud. analyze ~54-310um spectra PACS SPIRE spectrometers. More than 100 lines are detected, most them rotationally excited 12CO (up to J=48-47), H2O, OH, 13CO, HCN. Peaks 1/2 characterized by a very high L(CO)/L(FIR)~5x10^{-3} ratio plethora H2O...
The first two models of the Sea and Land Surface Temperature Radiometers (SLSTR) for European Copernicus Sentinel-3 missions were tested prior to launch at Rutherford Appleton Laboratory space instrument calibration facility. pre-launch tests provide an essential reference that ensures flight data SLSTR are calibrated same standards needed surface temperature measurements those used by shipborne radiometers Fiducial Reference Measurement (FRM). radiometric calibrations thermal infrared...
The Helix Nebula (NGC 7293) is the closest planetary nebulae. Therefore, it an ideal template for photochemical studies at small spatial scales in We aim to study distribution of atomic and molecular gas, structure photodissociation region along western rims as seen submillimeter range with Herschel. use 5 SPIRE FTS pointing observations make spectral maps. analyze gas by modeling CO rotational lines using a non-local thermodynamic equilibrium (non-LTE) radiative transfer model. For first...
Aims. In our series of papers presenting the Herschel imaging evolved planetary nebulae, we present images dust distribution in Helix nebula (NGC 7293).
Providing uncertainties in satellite datasets used for Earth observation can be a daunting prospect because of the many processing stages and input data required to convert raw detector counts calibrated radiances. The Sea Land Surface Temperature Radiometer (SLSTR) was designed provide measurements Earth’s surface operational climate applications. In this paper authors describe traceability chain derivation uncertainty estimates thermal infrared channel radiometry. Starting from instrument...
We present 168 arcmin^2 spectral images of the Sgr B2 complex taken with Herschel/SPIRE-FTS. detect ubiquitous emission from CO (up to J=12-11), H2O, [CI]492, 809 GHz, and [NII] 205 um lines. also maps SiO, N2H+, HCN, HCO+ obtained IRAM30m telescope. The cloud environment dominates emitted FIR (80%), H2O 752 GHz (60 %) mid-J (91%), [CI] (93 luminosity. region shows very extended (spatially correlated 24 70 dust emission). observed luminosities imply G_0~10^3. arises a pervasive component...
As part of a James Clerk Maxwell Telescope (JCMT) Legacy Survey star formation in the Gould Belt, we present early science results for Taurus. CO J= 3 –2 maps have been secured along north-west ridge and bowl, collectively known as L 1495, with deep 13CO C18O two subregions. With these data, search molecular outflows, use distribution flows, Herbig–Haro (HH) objects shocked H2 line-emission features, together population young stars, protostellar cores starless condensations to map across...