Results 61 to 70 of about 2,145,583 (298)
Simulations for Planning Next-generation Exoplanet Radial Velocity Surveys
The Astronomical Journal, 2023 Future direct imaging missions similar to the HabEx and LUVOIR mission concepts aim to catalog and characterize Earth-mass analogs around nearby stars.
Patrick D Newman +8 more
doaj +1 more source
VST processing facility: first astronomical applications [PDF]
VST–Tube is a new software package designed to process optical astronomical images. It is an automated pipeline to go from the raw exposures to fully calibrated co-added images, and to extract catalogs with aperture and PSF photometry.
Capaccioli, Massimo
core +2 more sources
Chiral Phonon–Driven Ultrafast Spin Currents in a Non‐Magnetic Ferroelectric
Advanced Materials, EarlyView.Broadband terahertz emission spectroscopy shows signatures of ultrafast spin‐current generation in non‐magnetic ferroelectric β$\beta$’‐In2Se3${\rm In}_2{\rm Se}_3$. Reversal of the emitted field upon sample inversion and substitution of Pt with W indicates spin‐Hall‐mediated charge conversion, while polarization‐resolved measurements reveal ...
Thomas B. Gill +16 more
wiley +1 more source
The Astrophysical JournalWe investigate longitude–velocity ( ℓ – v ) diagrams as a diagnostic tool to study the metallicity structure of the Milky Way (MW) disk. The present-day metallicity structure encodes the imprint of the Galaxy’s formation, assembly, and secular evolution.
Victor Liu +2 more
doaj +1 more source
Astronomical data compression experiment
Astronomical compression experiment. Lossless and lossy compression is performed on 16-bit astronomical data.
Maireles-Gonzalez, Oscar
core +1 more source
Near‐Infrared Imaging of H2O2 in Plants With Nanosensors Under Environmentally Changing Conditions
Advanced Materials, EarlyView.This paper reports a ratiometric nanosensor enabling robust, multivariate detection of stress signals (H2O2) in plants, with high resistance to light fluctuations and mechanical disturbances. Single‐walled carbon nanotubes serve as the sensor, Egyptian Blue nanosheets serve as a stable reference, and plant autofluorescence serves as a label‐free ...
Jiaqi Li +8 more
wiley +1 more source
Image processing of historical astronomical plates [PDF]
, 2018 © 2018 Astronomical Institute, Slovak Academy of Sciences. Many fields of X-ray astrophysics require multifrequency data including optical. Long-term data, such as provided by data archives, have special value.
core
Why Monte Carlo Simulations are Inferences and not Experiments [PDF]
, 2012 Monte Carlo Simulations arrive at their results by introducing randomness, sometimes derived from a physical randomizing device. Nonetheless, we argue, they open no new epistemic channels beyond that already employed by traditional simulations: the ...
John D. Norton +3 more
core +2 more sources
Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization
Advanced Materials Interfaces, EarlyView.Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan +6 more
wiley +1 more source
Mass Ejection Driven by Sudden Energy Deposition in Stellar Envelopes
The Astrophysical JournalA number of stellar astrophysical phenomena, such as tidal novae and planetary engulfment, involve sudden injection of subbinding energy in a thin layer within the star, leading to mass ejection of the stellar envelope.
Nicholas J. Corso, Dong Lai
doaj +1 more source