Results 21 to 30 of about 140,939 (212)
Photometry and astrometry with JWST‐II: NIRCam distortion correction
Astronomische Nachrichten, Volume 344, Issue 3, March 2023., 2023 Abstract In preparation to make the most of our own planned James Webb Space Telescope investigations, we take advantage of publicly available calibration and early‐science observations to independently derive and test a geometric‐distortion solution for NIRCam detectors. Our solution is able to correct the distortion to better than ∼$$ \sim $$0.2 mas.
M. Griggio, D. Nardiello, L. R. Bedin
wiley +1 more source
Ecology and Evolution, Volume 13, Issue 3, March 2023., 2023 Traditionally abiotic factors are considered the main drivers of biodiversity at macro‐scales, whereas biotic factors are considered important almost only at local scales. Modeling the distribution of 177 African bat species, we demonstrated the importance of considering biotic interactions in SDMs at macro‐scales regardless of the species’ ecology ...
Francesca Cosentino +3 more
wiley +1 more source
New Insights on 30 Dor B Revealed by High-quality Multiwavelength Observations
The Astronomical Journal, 2023 The supernova remnant (SNR) 30 Dor B is associated with the H ii region ionized by the OB association LH99. The complex interstellar environment has made it difficult to study the physical structure of this SNR.
Wei-An Chen +6 more
doaj +1 more source
Astronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023 Abstract Star‐forming and starburst galaxies (SBGs), which are well‐known cosmic‐ray (CR) reservoirs, are expected to emit gamma rays and neutrinos predominantly via hadronic collisions. In this work we analyze the 10‐year Fermi‐Low Energy Technique (LAT) spectral energy distributions of 13 nearby galaxies by means of a physical model that accounts for
Antonio Marinelli +5 more
wiley +1 more source
Reflex motion in the Milky Way stellar halo resulting from the Large Magellanic Cloud infall [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2020 We present the results of N-body models of the Milky Way and Large Magellanic Cloud system and study the kinematic reflex motion in the stellar halo owing to the barycentre displacement of the disc.
M. Petersen, J. Peñarrubia
semanticscholar +1 more source
The Red Supergiant Binary Fraction of the Large Magellanic Cloud [PDF]
Astrophysical Journal, 2020 The binary fraction of unevolved massive stars is thought to be 70%–100% but there are few observational constraints on the binary fraction of the evolved version of a subset of these stars, the red supergiants (RSGs).
K. Neugent +4 more
semanticscholar +1 more source
Journal of Biogeography, Volume 49, Issue 8, Page 1420-1442, August 2022., 2022 Abstract Aim Climate change is expected to impact mountain biodiversity by shifting species ranges and the biomes they shape. The extent and regional variation in these impacts are still poorly understood, particularly in the highly biodiverse Andes. Regional syntheses of climate change impacts on vegetation are pivotal to identify and guide research ...
Carolina Tovar +24 more
wiley +1 more source
The Large Magellanic Cloud Supernova Remnant MCSNR J0550-6823
The Astrophysical Journal, 2023 We describe radio, optical, and X-ray observations of this rather faint, old Large Magellanic Cloud (LMC) supernova remnant. The [O iii ] emission forms a distinct shell, the remnant of the outer shock, which encloses the radio and X-ray emission and ...
Frederick D. Seward, Sean D. Points
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Guanaco colonisation of Tierra del Fuego Island from mainland Patagonia: Walked, swam, or by canoe?
Geo: Geography and Environment, Volume 9, Issue 2, July‐December 2022., 2022 A geographical and biological puzzle that has perplexed scientists since the late 1800s working in southern South America: why are there so few vertebrates on the island of Tierra del Fuego compared to the adjacent Patagonia mainland, including the absence of the ubiquitous Guanaco (Lama guanicoe), wild camelid of the south? An interdisciplinary search
William L. Franklin
wiley +1 more source
The Origin of the Large Magellanic Cloud Globular Cluster NGC 2005
The Astronomical Journal, 2023 The ancient Large Magellanic Cloud (LMC) globular cluster NGC 2005 has recently been reported to have an ex situ origin, thus, setting precedents that the LMC could have partially formed from smaller merged dwarf galaxies.
Andrés E. Piatti, Yutaka Hirai
doaj +1 more source