A5102709121- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Molecular Spectroscopy and Structure
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Calibration and Measurement Techniques
- Astrophysics and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Astrophysical Phenomena and Observations
- Superconducting and THz Device Technology
- CCD and CMOS Imaging Sensors
- Inorganic Chemistry and Materials
- Crystal Structures and Properties
- Spectroscopy and Laser Applications
- Spacecraft and Cryogenic Technologies
- Force Microscopy Techniques and Applications
- Pulsars and Gravitational Waves Research
- History and Developments in Astronomy
- Iron-based superconductors research
- Advanced Combustion Engine Technologies
- Advanced Semiconductor Detectors and Materials
Max Planck Institute for Astronomy
2014-2025
Goddard Space Flight Center
2024
Grunberger Diabetes Institute
2024
Forschungszentrum Jülich
2022
SRON Netherlands Institute for Space Research
2018-2020
University of Oxford
2020
Centro de Astrobiología
2018
NanoWorld Services (Germany)
2007-2017
Schott (Germany)
2007-2017
Diakovere
2017
The Photodetector Array Camera and Spectrometer (PACS) is one of the three science instruments on ESA's far infrared submillimetre observatory. It employs two Ge:Ga photoconductor arrays (stressed unstressed) with 16x25 pixels, each, filled silicon bolometer 16x32 32x64 respectively, to perform integral-field spectroscopy imaging photometry in 60-210μ m wavelength regime. In mode, it simultaneously images bands, 60-85μ or 85-125μ\m 125-210μ m, over a field view ~1.75'x3.5', close Nyquist...
We summarize the first results from Gould Belt survey, obtained toward Aquila Rift and Polaris Flare regions during 'science demonstration phase' of Herschel. Our 70-500 micron images taken in parallel mode with SPIRE PACS cameras reveal a wealth filamentary structure, as well numerous dense cores embedded filaments. Between ~ 350 500 prestellar 45-60 Class 0 protostars can be identified field, while unbound starless no are observed field. The core mass function (CMF) derived for region...
We present ∼kiloparsec spatial resolution maps of the CO-to-H2 conversion factor (αCO) and dust-to-gas ratio (DGR) in 26 nearby, star-forming galaxies. have simultaneously solved for αCO DGR by assuming that is approximately constant on kiloparsec scales. With this assumption, we can combine dust mass surface density, CO-integrated intensity, H i column density to solve both with no assumptions about their value or dependence metallicity other parameters. Such a study has just become...
Euclid is a space-based survey mission from the European Space Agency designed to understand origin of Universe's accelerating expansion. It will use cosmological probes investigate nature dark energy, matter and gravity by tracking their observational signatures on geometry universe cosmic history structure formation. The optimised for two independent primary probes: Weak gravitational Lensing (WL) Baryonic Acoustic Oscillations (BAO). payload consists 1.2 m Korsch telescope provide large...
The KINGFISH project (Key Insights on Nearby Galaxies: a Far-Infrared Survey with Herschel) is an imaging and spectroscopic survey of 61 nearby (d < 30 Mpc) galaxies, chosen to cover wide range galaxy properties local interstellar medium (ISM) environments found in the universe. Its broad goals are characterize ISM present-day heating cooling their gaseous dust components, better understand physical processes linking star formation ISM. direct descendant Spitzer Infrared Galaxies (SINGS),...
Cassiopeia A is one of the youngest supernova remnants known in Milky Way and a unique laboratory for physics. We present an optical spectrum near maximum brightness, obtained from observations scattered light echo - more than three centuries after direct explosion swept past Earth. The shows that was type IIb originated collapse helium core red supergiant had lost most its hydrogen envelope prior to exploding. Our finding concludes longstanding debate on progenitor provides new insight into...
New far-infrared and sub-millimeter photometry from the Herschel Space Observatory is presented for 61 nearby galaxies Key Insights on Nearby Galaxies: A Far-Infrared Survey with (KINGFISH) sample. The spatially-integrated fluxes are largely consistent expectations based Spitzer extrapolations to longer wavelengths using popular dust emission models. Dwarf irregular notable exceptions, as already noted by other authors, their 500um shows evidence a excess. In addition, fraction of heating...
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...
The nearby Supernova 1987A was accompanied by a burst of neutrino emission, which indicates that compact object (a neutron star or black hole) formed in the explosion. There has been no direct observation this object. In work, we observe supernova remnant with JWST spectroscopy finding narrow infrared emission lines argon and sulphur. line is spatially unresolved blueshifted velocity relative to rest frame. We interpret as gas illuminated source ionizing photons located close center...
Noble gas molecules have not hitherto been detected in space. From spectra obtained with the Herschel Space Observatory, we report detection of emission 617.5 GHz and 1234.6 J = 1-0 2-1 rotational lines {36}ArH^+ at several positions Crab Nebula, a supernova remnant known to contain both H2 regions enhanced ionized argon emission. {36}Ar is believed originated from explosive nucleosynthesis massive stars during core-collapse events. Its product such event, confirms this expectation. The...
Using the 3.5-m Herschel Space Observatory, imaging photometry of Cas A has been obtained in six bands between 70 um and 500 with PACS SPIRE instruments, angular resolutions ranging from 6 to 37". In outer regions remnant 70-um image resembles 24-um Spitzer image, emission attributed same warm dust component, located reverse shock region. At longer wavelengths, three are increasingly dominated by cold interstellar knots filaments, particularly across central, western southern parts remnant....
Whether supernovae are major sources of dust in galaxies is a long-standing debate. We present infrared and submillimeter photometry spectroscopy from the Herschel Space Observatory Crab Nebula between 51 670 μm as part Mass Loss Evolved StarS program. compare emission detected with multiwavelength data including millimeter, radio, mid-infrared, archive optical images. carefully remove synchrotron component using Planck fluxes measured same epoch. The contribution line removed combined...
The Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST) provides measurements over wavelength range 5 to 28.5 μm. MIRI has, within a single "package," four key scientific functions: photometric imaging, coronagraphy, single-source low-spectral resolving power (R ∼ 100) spectroscopy, and medium-resolving 1500 3500) integral field spectroscopy. An associated cooler system maintains at its operating temperature of < 6.7 K. This paper describes driving principles behind...
Spitzer Space Telescope and Herschel Observatory imaging of M31 is used, with a physical dust model, to construct maps surface density, dust-to-gas ratio, starlight heating intensity, PAH abundance, out R=25kpc. The global mass M_d=5.4x10^7Msol, the dust/H ratio M_d/M_H=0.0081, abundance <q_PAH>=0.039. density has an inner ring at R=5.6kpc, maximum R=11.2kpc, outer R=15.1kpc. dust/gas varies from M_d/M_H=0.026 center ~0.0027 From we estimate ISM metallicity vary by factor ~10, Z/Zsol=3 R=0...
New images of M31 at 24, 70, and 160 μm taken with the Multiband Imaging Photometer for Spitzer (MIPS) reveal morphology dust in this galaxy. This is well represented by a composite two logarithmic spiral arms circular ring (radius ~10 kpc) star formation offset from nucleus. The appear to start ends bar nuclear region extend beyond star-forming ring. As has been found previous work, are not continuous, but composed segments. very except near M32 where it splits. lack well-defined prominence...
We characterize the dust in NGC628 and NGC6946, two nearby spiral galaxies KINGFISH sample. With data from 3.6um to 500um, models are strongly constrained. Using Draine & Li (2007) model, (amorphous silicate carbonaceous grains), for each pixel galaxy we estimate (1) mass surface density, (2) fraction contributed by polycyclic aromatic hydrocarbons (PAH)s, (3) distribution of starlight intensities heating dust, (4) total infrared (IR) luminosity emitted (5) IR originating regions with high...
Using new far-infrared imaging from the Herschel Space Observatory with ancillary data ultraviolet to submillimeter wavelengths, we estimate total emission dust and stars of 62 nearby galaxies in KINGFISH survey a way that is as empirical model-independent possible. We collect exploit these order measure spectral energy distributions (SEDs) precisely how much stellar radiation intercepted re-radiated by dust, this quantity varies galaxy properties. By including SPIRE data, are more sensitive...
MESS (Mass-loss of Evolved StarS) is a Guaranteed Time Key Program that uses the PACS and SPIRE instruments on board Herschel Space Observatory to observe representative sample evolved stars, include asymptotic giant branch (AGB) post-AGB planetary nebulae red supergiants, as well luminous blue variables, Wolf-Rayet stars supernova remnants. In total, order 150 objects are observed in imaging about 50 spectroscopy. This paper describes target selection list, observing strategy. science...
Context. The temperature and density structure of molecular cloud cores are the most important physical quantities that determine course protostellar collapse properties stars they form. Nevertheless, profiles often rely either on simplifying assumption isothermality or observationally poorly constrained model profiles. instruments Herschel satellite provide us for first time with both spectral coverage spatial resolution is needed to directly measure dust nearby cores.
We present spectral energy distributions (SEDs) of 69 QSOs at z > 5, covering a rest frame wavelength range 0.1 μm to ∼80 μm, and centered on new Spitzer Herschel observations. The detection rate the with is very high (97% λrest ≲ 4 μm), but drops toward bands 30% detected in PACS (rest mid-infrared) 15% additionally SPIRE far-infrared; FIR). perform multi-component SED fits for Herschel-detected objects confirm that match observed SEDs, clumpy torus model needs be complemented by hot (∼1300...
We use new Herschel multi-band imaging of the Andromeda galaxy to analyze how dust heating occurs in central regions spheroids that are essentially devoid young stars. construct a temperature map M31 through fitting modified blackbody SEDs data, and find within 2 kpc rises strongly from mean value disk 17 pm 1K \sim35K at centre. UV near-IR few shows directly absence stellar populations, delineates radial profile density, demonstrates even near-UV extinction is optically thin M31's bulge....