Results 11 to 20 of about 402,684 (314)
Giant Halos in Dwarf Irregular Galaxies vs. Dwarf Elliptical Galaxies [PDF]
Proceedings of the International Astronomical Union, 2005 We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times larger than the main body of the galaxy seen in the ...
Hwang, Narae, Lee, Myung Gyoon
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Sagittarius: The Nearest Dwarf Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 1995 We have discovered a new Galactic satellite galaxy in the constellation of Sagittarius. The Sagittarius dwarf galaxy is the nearest galaxy known, subtends an angle of $> 10$ degrees on the sky, lies at a distance of $24 \kpc$ from the Sun, $\sim 16 \kpc$
Gilmore, G. +2 more
core +4 more sources
Star forming dwarf galaxies [PDF]
, 2011 Star forming dwarf galaxies (SFDGs) have a high gas content and low metallicities, reminiscent of the basic entities in hierarchical galaxy formation scenarios.
A Adamo +146 more
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Advances in Astronomy, 2010 This is the editorial paper which introduces the Special Issue on Dwarf-Galaxy Cosmology published in Advances in Astronomy. The issue contains fourteen review papers, and one original research article. All papers were peer-reviewed by a minimum of two referees. To read the Special Issue, please follow this link: http://www.hindawi.com/journals/aa/2010/
Regina Schulte-Ladbeck +3 more
doaj +3 more sources
Proton Acceleration with Relativistic Electromagnetic Shock. [PDF]
Adv Sci (Weinh)New Ion Acceleration Mechanism! A novel cosmic‐ray proton acceleration mechanism is proposed, where relativistic electromagnetic shocks accelerate protons transversely. Hamiltonian analysis yields a scaling law linking the proton energy to the minimum longitudinal thickness of the shock.
Xiao T +5 more
europepmc +2 more sources
Constraining Primordial Black Holes with Dwarf Galaxy Heating [PDF]
, 2020 Black holes formed in the early universe, prior to the formation of stars, can exist as dark matter and also contribute to the black hole merger events observed in gravitational waves.
P. Lu +5 more
semanticscholar +1 more source
Symposium - International Astronomical Union, 1999 We review the observational evidences for tidal dwarf galaxies, a class of small galaxies formed out of the tidal debris of collisions between massive galaxies. Tidal dwarfs are found far from the interacting parent galaxies, associated with massive clouds of atomic hydrogen located at the tip of long tidal tails.
Duc, Pierre-Alain, Mirabel, Felix
openaire +2 more sources
The Pristine dwarf galaxy survey–V. The edges of the dwarf galaxy Hercules
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT We present a new spectroscopic study of 175 stars in the vicinity of the dwarf galaxy Hercules (d ∼ 132 kpc) with data from the Anglo-Australian Telescope and its AAOmega spectrograph together with the Two Degree Field multi-object system to solve the conundrum that whether Hercules is tidally disrupting.
Nicolas Longeard +8 more
openaire +3 more sources
The Local Group on FIRE: dwarf galaxy populations across a suite of hydrodynamic simulations [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present a new set of high-resolution hydrodynamic cosmological zoom-in simulations that apply the Feedback In Realistic Environments physics to both Local Group (LG)-like and isolated Milky Way (MW)-like volumes (10 host systems in total with a ...
S. Garrison-Kimmel +10 more
semanticscholar +1 more source
The Herschel Dwarf Galaxy Survey [PDF]
Astronomy & Astrophysics, 2019 The sensitive infrared telescopes, Spitzer and Herschel, have been used to target low-metallicity star-forming galaxies, allowing us to investigate the properties of their interstellar medium (ISM) in unprecedented detail.
D. Cormier +9 more
semanticscholar +1 more source