Results 31 to 40 of about 95,570 (274)
The Proper Motion Field of the Small Magellanic Cloud: Kinematic Evidence for Its Tidal Disruption [PDF]
Astrophysical Journal, 2018 We present a new measurement of the systemic proper motion of the Small Magellanic Cloud (SMC), based on an expanded set of 30 fields containing background quasars and spanning a ∼3 year baseline, using the Hubble Space Telescope (HST) Wide Field Camera ...
P. Zivick +11 more
semanticscholar +1 more source
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
The Star Formation History of the Small Magellanic Cloud [PDF]
, 2003 We present the spatially resolved star formation and chemical enrichment history of the Small Magellanic Cloud (SMC) across the entire central 4° × 4.°5 area of the main body, based on UBVI photometry from our Magellanic Clouds Photometric Survey.
J. Harris, D. Zaritsky
semanticscholar +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
UVIT Observations of the Small Magellanic Cloud: Point-source Catalog
The Astrophysical Journal, 2023 Three fields in the outskirts of the Small Magellanic Cloud were observed by the UltraViolet Imaging Telescope (UVIT) on board AstroSat, between 2017 December 31 and 2018 January 1.
A. Devaraj +4 more
doaj +1 more source
Constraining mixing in massive stars in the Small Magellanic Cloud [PDF]
Astronomy & Astrophysics, 2019 Context. The evolution of massive stars is strongly influenced by internal mixing processes such as semiconvection, convective core overshooting, and rotationally induced mixing. None of these processes are currently well constrained. Aims.
A. Schootemeijer +3 more
semanticscholar +1 more source
The VMC survey – XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids [PDF]
, 2017 The "VISTA near-infrared YJKs survey of the Magellanic System" (VMC) is collecting deep Ks-band time-series photometry of pulsating stars hosted by the two Magellanic Clouds and their connecting Bridge.
V. Ripepi +15 more
semanticscholar +1 more source
Determination of the Primordial Helium Abundance Based on NGC 346, an H ii Region of the Small Magellanic Cloud [PDF]
Astrophysical Journal, 2019 To place meaningful constraints on Big Bang Nucleosynthesis models, the primordial helium abundance determination is crucial. Low-metallicity H ii regions have been used to estimate it because their statistical uncertainties are relatively small.
M. Valerdi +3 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