Results 71 to 80 of about 241,346 (164)

A Photometric Study of Giant Ellipticals and Their Stellar Halos With VST

open access: yesGalaxies, 2017
Observations of diffuse starlight in the outskirts of galaxies are thought to be a fundamental source of constraints on the cosmological context of galaxy assembly in the Λ CDM model.
Marilena Spavone   +10 more
doaj   +1 more source

Misaligned Gas Acquisition as a Formation Pathway of S0 Galaxies

open access: yesThe Astrophysical Journal
We analyze a sample of 753 S0 galaxies from the MPL-10 of Mapping Nearby Galaxies at Apache Point Observatory survey and investigate the gas–star kinematic misalignment and merger remnant fraction in galaxies with different morphological types.
Yuren Zhou   +5 more
doaj   +1 more source

The Extended Baryonic Halo of NGC 3923

open access: yesGalaxies, 2017
Galaxy halos and their globular cluster systems build up over time by the accretion of small satellites. We can learn about this process in detail by observing systems with ongoing accretion events and comparing the data with simulations.
Bryan W. Miller   +9 more
doaj   +1 more source

Galaxy Classification Using EWGC

open access: yesUniverse
The Enhanced Wide-field Galaxy Classification Network (EWGC) is a novel architecture designed to classify spiral and elliptical galaxies using Wide-field Infrared Survey Explorer (WISE) images.
Yunyan Nie   +6 more
doaj   +1 more source

Grigori Kuzmin and Stellar Dynamics

open access: yesOpen Astronomy, 2011
Grigori Kuzmin was a very gifted dynamicist and one of the towering figures in the distinguished history of the Tartu Observatory. He obtained a number of important results in relative isolation which were later rediscovered in the West.
Zeeuw P. Tim de, Ven Glenn van de
doaj   +1 more source

Creating S0s with Major Mergers: A 3D View

open access: yesGalaxies, 2015
A number of simulators have argued that major mergers can sometimes preserve discs, but the possibility that they could explain the emergence of lenticular galaxies (S0s) has been generally neglected.
Miguel Querejeta   +10 more
doaj   +1 more source

Planetary nebulae as tracers of accreted stellar populations in massive galaxies in groups and clusters

open access: yesFrontiers in Astronomy and Space Sciences
Planetary nebulae (PNe) are valuable spatial and kinematic tracers of nearby galaxies. In this mini-review, I focus on their role in tracing the halo and intra-cluster/intra-group light assembly in groups and clusters of galaxies within 100 Mpc and, in ...
Johanna Hartke   +2 more
doaj   +1 more source

A New Chapter in Hard X-rays of the M87 AGN

open access: yesProceedings, 2019
The nearby M87 hosts an exceptional relativistic jet. It has been regularly monitored in radio to TeV bands, but little has been done in hard X-rays ≳10 keV.
Ka-Wah Wong   +3 more
doaj   +1 more source

The intrinsic shape and dynamical structure of the bulges of lenticular galaxies

open access: yes, 2014
Several scenarios have been proposed to account for the formation and evolution of galactic bulges and to explain the variety of their observed properties. Both the intrinsic shape and dynamical structure of bulges depend on the mechanisms and timescales
L. Costantin   +5 more
semanticscholar   +1 more source

Revisiting the Globular Cluster Systems of NGC 3258 and NGC 3268

open access: yesGalaxies, 2017
We present a photometric study of NGC 3258 and NGC 3268 globular cluster systems (GCSs) with a wider spatial coverage than previous works. This allowed us to determine the extension of both GCSs, and obtain new values for their populations.
Juan Pablo Caso, Lilia Bassino
doaj   +1 more source

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