Results 91 to 100 of about 32,916 (218)
Origin and Evolution of Large-scale Magnetic Fields
, 2015 Magnetic elds are ubiquitous at all scales in the Universe and have been observed in galaxies and clusters of galaxies via observations of di use radio emission and Faraday Rotation Measures.
Barnes, DJ
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Optical polarimetry studies of Seyfert galaxies [PDF]
, 1999 Optical imaging polarimetry has been performed on seven nearby Seyfert galaxies, three with face-on and four with edge-on host galaxies of various morphological classifications.
Felton, Michelle Ann
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Visit Nearby Halo Substructures Using LAMOST DR9 MRS Data
The Astrophysical JournalBased on the LAMOST DR9 Medium Resolution Spectra (MRS) catalog, combined with astrometries from Gaia DR3, we conducted an investigation into the substructures in the stellar halo to obtain their chemical and kinematic information.
Xin-Zhe Tang +5 more
doaj +1 more source
The Vertical Metallicity Gradient of the Galactic Disk for Mono-age Stellar Populations in LAMOST
The Astrophysical JournalThe vertical metallicity gradient of the Galactic disk offers valuable insights into the disk’s formation and chemical evolution over time. We utilized the Large Sky Area Multi-Object Fibre Spectroscopic Telescope low-resolution spectral young stellar ...
Gaohuan Long +5 more
doaj +1 more source
Galaxy Structure, Dark Matter, and Galaxy Formation
, 1996 To appear in "Dark and Visible Matter in Galaxies and Cosmological Implications," eds. M. Persic and P. Salucci, A.S.P. Conference Series.
openaire +2 more sources
The Astrophysical Journal Supplement SeriesWe derive circular velocity curves (CVCs) from stellar dynamical models for ∼6000 nearby galaxies in the final data release of the Sloan Digital Sky Survey-IV MaNGA survey with integral-field spectroscopy, exploring connections between the inner ...
Kai Zhu +8 more
doaj +1 more source
The GALAH survey: Searching for and characterizing halo substructures with the GALAH DR4 survey
Astronomy & AstrophysicsContext. Recent studies have revealed that the Milky Way’s stellar halo is a composite of stellar populations of different origins, including multiple accretion events.
Kushniruk Iryna +14 more
doaj +1 more source
Secondary evolution of galaxies investigated by N-body simulations
, 2008 In the ΛCDM cosmology, merging is one of the most important physical processes that drives the formation and evolution of galaxies. In the present work, we use N-body techniques to investigate some of currently open issues related to the formation and ...
Coppola, Giuseppina
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The star formation history of early-type galaxies in the fornax cluster [PDF]
, 1998 We have measured central line strengths and line-strength gradients for a complete sample of early-type galaxies in the Fornax cluster, comprising 11 elliptical and 11 lenticular galaxies, more luminous than M(_B) = -17.
Kuntschner, Harald, Kuntschner, H.
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The Growth of Galaxy Stellar Haloes over 0.2 ≤ z ≤ 1.1
The Astrophysical JournalGalaxies are predicted to assemble their stellar haloes through the accretion of stellar material from interactions with their cosmic environment. Observations that trace stellar halo buildup probe the processes that drive galaxy size and stellar mass ...
Devin J. Williams +11 more
doaj +1 more source