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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
Hα Distances to the Leading Arm of the Magellanic Stream [PDF]
Astrophysical Journal, 2020 The Leading Arm (LA) is a tidal feature that is in front of the Magellanic Clouds (MCs) on their orbit through the Galaxy’s halo. Many physical properties of the LA, such as its mass and size, are poorly constrained because it has few distance ...
Jacqueline Antwi-Danso +3 more
semanticscholar +1 more source
Behavioural responses by a bumble bee to competition with a niche‐constructing congener
Journal of Animal Ecology, Volume 91, Issue 3, Page 580-592, March 2022., 2022 Nectar robbing by flower‐biting bumble bees constitutes ecological niche construction if robbing holes persist and intensify nectar competition experienced by non‐biting, bystander flower visitors. In response, bystanders can tolerate robbing, switch plant species or adopt robbing, perhaps partially compensating for exploitative competition associated ...
Nick M. Rosenberger +3 more
wiley +1 more source
Belgica antarctica (Diptera: Chironomidae): A natural model organism for extreme environments
Insect Science, Volume 29, Issue 1, Page 2-20, February 2022., 2022 We provide information on Belgica antarctica, which allows us to consider the species as a natural model organism to study adaptation and functioning in extreme conditions. Abstract Belgica antarctica (Diptera: Chironomidae), a brachypterous midge endemic to the maritime Antarctic, was first described in 1900.
Iryna Kozeretska +4 more
wiley +1 more source
Ecology and Evolution, Volume 11, Issue 14, Page 9191-9197, July 2021., 2021 Birds are known to act as potential vectors for the exogenous dispersal of bryophyte diaspores. Given the totipotency of vegetative tissue of many bryophytes, birds could also contribute to endozoochorous bryophyte dispersal. We evaluated the role of endozoochory in two herbivorous and sympatric bird species in sub‐Antarctic Chile and hypothesized that
Xenabeth A. Lázaro +2 more
wiley +1 more source
COOL GAS IN THE MAGELLANIC STREAM [PDF]
The Astrophysical Journal, 2009 We present the first direct detection of cold atomic gas in the Magellanic Stream, through 21 cm line absorption toward a background radio source, J0119 - 6809, using the Australia Telescope Compact Array. Two absorption components were identified at heliocentric velocities 218.6 km/s and 227.0 km/s, with optical depths of tau ~ 0.02. The corresponding
Matthews, Deanna Maree. +3 more
openaire +2 more sources
The origin of the Magellanic Stream [PDF]
Monthly Notices of the Royal Astronomical Society, 1994 SHORTENED ABSTRACT: We present numerical investigations designed to critically test models of the origin of the Magellanic Stream. The most developed model is the tidal model which fails to reproduce several of its characteristic properties. We suggest an alternative model for the origin of the Stream which can explain all of its observed features and ...
Moore, Ben, Davis, Marc
openaire +2 more sources
Discovery of a Disrupting Open Cluster Far into the Milky Way Halo: A Recent Star Formation Event in the Leading Arm of the Magellanic Stream? [PDF]
Astrophysical Journal, 2018 We report the discovery of a young ( ), low-mass ( ), metal-poor ( ) stellar association at a heliocentric distance , placing it far into the Milky Way (MW) halo.
A. Price-Whelan +6 more
semanticscholar +1 more source
New Constraints on the Nature and Origin of the Leading Arm of the Magellanic Stream [PDF]
Astrophysical Journal, 2018 We present a new precision measurement of gas-phase abundances of S, O, N, Si, Fe, P, Al, Ca as well as molecular hydrogen (H2) in the Leading Arm (region II, LA II) of the Magellanic Stream (MS) toward the Seyfert galaxy NGC 3783.
P. Richter +7 more
semanticscholar +1 more source
The Large Magellanic Cloud’s ∼30 kpc Bow Shock and Its Impact on the Circumgalactic Medium
The Astrophysical Journal Letters, 2023 The interaction between the supersonic motion of the Large Magellanic Cloud (LMC) and the circumgalactic medium (CGM) is expected to result in a bow shock that leads the LMC’s gaseous disk.
David J. Setton +6 more
doaj +1 more source