Results 21 to 30 of about 101,631 (216)
Evidence for the Disruption of a Planetary System During the Formation of the Helix Nebula
The Astronomical Journal, 2022 The persistence of planetary systems after their host stars evolve into their post-main-sequence phase is poorly constrained by observations. Many young white dwarf systems exhibit infrared excess emission and/or spectral absorption lines associated with
Jonathan P. Marshall +7 more
doaj +1 more source
The first detection of Far-Infrared emission associated with an extended HI disk. The case of NGC 891 [PDF]
, 2003 Spiral galaxies in the Local Universe are commonly observed to be embedded in extended disks of neutral hydrogen - the so called ``extended HI disks''.
Alton +38 more
core +1 more source
The Astrophysical Journal, 2023 The dichotomy between radio-loud (RL) and radio-quiet (RQ) active galactic nuclei (AGNs) is thought to be intrinsically related to radio jet production. This difference may be explained by the presence of a strong magnetic field ( B -field) that enhances,
Enrique Lopez-Rodriguez +5 more
doaj +1 more source
The Structure of Magnetic Fields in Spiral Galaxies: A Radio and Far-infrared Polarimetric Analysis
The Astrophysical Journal, 2023 We propose and apply a method to quantify the morphology of the large-scale ordered magnetic fields ( B -fields) in galaxies. This method is adapted from the analysis of Event Horizon Telescope polarization data.
William Jeffrey Surgent +2 more
doaj +1 more source
Surveying the Giant H ii Regions of the Milky Way with SOFIA: V. DR7 and K3-50
The Astrophysical Journal, 2023 We present our fifth set of results from our mid-infrared imaging survey of Milky Way Giant H ii (GH ii ) regions with our detailed analysis of DR7 and K3-50.
James M. De Buizer +3 more
doaj +1 more source
Launching the VASCO Citizen Science Project
Universe, 2022 The Vanishing & Appearing Sources during a Century of Observations (VASCO) project investigates astronomical surveys spanning a time interval of 70 years, searching for unusual and exotic transients.
Beatriz Villarroel +27 more
doaj +1 more source
Infrared spectroscopic diagnostics for Active Galactic Nuclei
, 2007 Infrared spectroscopy in the mid- and far-infrared provides powerful diagnostics for studying the emission regions in active galaxies. The large variety of ionic fine structure lines can probe gas conditions in a variety of physical conditions, from ...
Spinoglio, Luigi
core +1 more source
The Astrophysical JournalInfrared-luminous galaxies are important sites of stellar and black hole mass assembly at most redshifts. Their luminosities are often estimated by fitting spectral energy distribution (SED) models to near- to far-infrared data, but the dependence of ...
Duncan Farrah +25 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Gold bipyramids can act as efficient plasmonic nanoheaters, but they often reshape during laser heating. This study shows that oxygen nanobubbles drive oxidative etching and that surface ligands control stability. CTAB‐ and citrate‐coated particles blunt and lose optical performance, whereas polystyrene sulfonate preserves shape and heating by ...
Irene López‐Sicilia +7 more
wiley +1 more source
Advanced Materials, EarlyView.The magnetic high entropy oxide perovskite Nd(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 exhibits a substantially large dielectric constant (εr) at room temperature, which shows distinct anionic and cationic contributions in the form of zero and finite bias peaks, respectively, down to its magnetic transition temperature (Tmag).
Roxana Capu +19 more
wiley +1 more source