Results 31 to 40 of about 484,937 (232)
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
Microlensing towards the Large Magellanic Cloud [PDF]
Astronomy & Astrophysics, 2002 The nature and the location of the lenses discovered in the microlensing surveys done so far towards the LMC remain unclear. Motivated by these questions we compute the optical depth and particularly the number of expected events for self-lensing for both the MACHO and EROS2 observations.
Luigi Mancini +6 more
openaire +6 more sources
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
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
doaj +1 more source
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
Diversity and Distributions, Volume 27, Issue 11, Page 2277-2296, November 2021., 2021 Abstract Aim Delimiting recently diverged species is challenging. During speciation, genetic differentiation may be distributed unevenly across the genome, as different genomic regions can be subject to different selective pressures and evolutionary histories.
María José Frugone +20 more
wiley +1 more source
The Distance to the Large Magellanic Cloud [PDF]
International Astronomical Union Colloquium, 2000 AbstractI demonstrate that the two unexpected results in the local Universe: anomalous intrinsic (V – I)0 colors of RR Lyrae stars and clump giants in the Galactic center, and very short distances to Magellanic Clouds inferred from clump giants, can be at least partially resolved with a modified coefficient of selective extinction AV/E(V – I).
openaire +5 more sources
An efficient way to use MS‐CLEAN associated with Shannon's entropy
IET Image Processing, Volume 15, Issue 10, Page 2319-2331, August 2021., 2021 Abstract This article covers deconvolution methods in the context of radio astronomical images. A new formulation is proposed to deal with negative brightness, deconvoluting separately the positive and negative brightness of the sky. The positive brightness is physically possible, but negative brightness is a degradation product.
Ramon G. Campos, Evandro O. T. Salles
wiley +1 more source