Results 11 to 20 of about 64,574 (197)

Dwarf elliptical galaxies as ancient tidal dwarf galaxies [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2013
The formation of tidal dwarf galaxies (TDGs) is triggered by the encounters of already existing galaxies. Their existence is predicted from numerical calculations of encountering galaxies and is also well documented with observations. The numerical calculations on the formation of TDGs furthermore predict that TDGs cannot contain significant amounts of
Jörg Dabringhausen, Pavel Kroupa
openaire   +3 more sources

Identification and Characterization of a Large Sample of Distant Active Dwarf Galaxies in XMM-SERVS

open access: yesThe Astrophysical Journal, 2023
Active dwarf galaxies are important because they contribute to the evolution of dwarf galaxies and can reveal their hosted massive black holes. However, the sample size of such sources beyond the local universe is still highly limited.
Fan Zou   +12 more
doaj   +1 more source

The Mass–Metallicity Relation of Dwarf Galaxies at Cosmic Noon from JWST Observations

open access: yesThe Astrophysical Journal Letters, 2023
We present a study of the mass–metallicity relation (MZR) of 51 dwarf galaxies ( M _⋆ ≈ 10 ^6.5 –10 ^9.5 M _⊙ ) at z = 2–3 from the A2744 and SMACS J0723-3732 galaxy cluster fields.
Mingyu Li   +15 more
doaj   +1 more source

Associations of Dwarf Galaxies [PDF]

open access: yesThe Astronomical Journal, 2006
50 pages, 2 tables, 15 encapsulated figures, 1 (3 part) jpg figure.
Luca Rizzi   +10 more
openaire   +3 more sources

Dwarfs from the Dark (Energy Survey): a machine learning approach to classify dwarf galaxies from multi-band images

open access: yesThe Open Journal of Astrophysics, 2021
Countless low-surface brightness objects - including spiral galaxies, dwarf galaxies, and noise patterns - have been detected in recent large surveys.
Oliver Müller, Eva Schnider
doaj   +1 more source

A Comparison between the Morphologies and Structures of Dwarf Galaxies with and without Active Massive Black Holes

open access: yesThe Astrophysical Journal, 2023
We study the morphologies and structures of 57 dwarf galaxies that are representative of the general population of dwarf galaxies and compare their demographics to a sample of dwarf galaxies hosting optically selected active galactic nuclei (AGNs).
Seth J. Kimbrell   +3 more
doaj   +1 more source

An Overview of the Dwarf Galaxy Survey [PDF]

open access: yesPublications of the Astronomical Society of the Pacific, 2013
The Dwarf Galaxy Survey (DGS) program is studying low-metallicity galaxies using 230h of far-infrared (FIR) and submillimetre (submm) photometric and spectroscopic observations of the Herschel Space Observatory and draws to this a rich database of a wide range of wavelengths tracing the dust, gas and stars.
Madden, S. C.   +40 more
openaire   +10 more sources

The formation of ultra-compact dwarf galaxies and nucleated dwarf galaxies [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2008
Ultra compact dwarf galaxies (UCDs) have similar properties as massive globular clusters or the nuclei of nucleated galaxies. Recent observations suggesting a high dark matter content and a steep spatial distribution within groups and clusters provide new clues as to their origins.
Stelios Kazantzidis   +6 more
openaire   +6 more sources

The Pristine dwarf galaxy survey–V. The edges of the dwarf galaxy Hercules

open access: yesMonthly 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

DWARF GALAXIES AND THE COSMIC WEB [PDF]

open access: yesThe Astrophysical Journal, 2013
We use a cosmological simulation of the formation of the Local Group of Galaxies to identify a mechanism that enables the removal of baryons from low-mass halos without appealing to feedback or reionization. As the Local Group forms, matter bound to it develops a network of filaments and pancakes.
Benítez-Llambay, Alejandro   +6 more
openaire   +6 more sources

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