Results 1 to 10 of about 5,566,689 (217)
On the spiral structure of the Milky Way Galaxy [PDF]
Astronomy Reports, 2011 We consider the possible pattern of the overall spiral structure of the Galaxy, using data on the distribution of neutral (atomic), molecular, and ionized hydrogen, on the base of the hypothesis of the spiral structure being symmetric, i.e. the assumption that spiral arms are translated into each other for a rotation around the galactic center by 180° (
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The Stellar Halo of the Galaxy is Tilted and Doubly Broken
The Astronomical Journal, 2022 Modern Galactic surveys have revealed an ancient merger that dominates the stellar halo of our galaxy (Gaia–Sausage–Enceladus, GSE). Using chemical abundances and kinematics from the H3 Survey, we identify 5559 halo stars from this merger in the radial ...
Jiwon Jesse Han +9 more
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The Astrophysical Journal LettersSpiral galaxies, like the Milky Way, transform at some point in time into a rotationally supported system. Using an extant dataset consisting of 319,835 subgiants from LAMOST with precise ages from the literature, we determine, for the first time, the ...
Sofia Feltzing +2 more
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The Astrophysical JournalWe use several smoothed particle hydrodynamics+ N -body models as part of the GASTRO library to study the role of high-density star-forming clumpy regions and a single merger on the formation of the α -rich and α -poor populations in the disk galaxies ...
João A. S. Amarante +12 more
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A comparison of the Andromeda and Milky Way galaxies [PDF]
Symposium - International Astronomical Union, 1985 A comparison of some of the basic properties of M31 and the Milky Way indicates that in almost every respect M31 is larger than the Galaxy. It is more luminous, redder, more massive, and of earlier Hubble type. A detailed comparison of the spiral structure, based on optical tracers, for comparable areas in the outer parts of each galaxy shows ...
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The Astronomical JournalUsing the Dark Energy Spectroscopic Instrument (DESI) Milky Way Survey, we examine the six-dimensional space of the anticenter region of the Milky Way stellar disk (150° < Galactic longitude < 220°) using 61,883 main-sequence turnoff stars.
Mika Lambert +48 more
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The Orbital Anisotropy Profile of the Gaia-Sausage/Enceladus Accretion Remnant
The Astrophysical JournalThe Gaia - Sausage/Enceladus (GS/E) accretion remnant is one of the most important stellar populations in the Milky Way halo. Recent simulation-based work has suggested that the anisotropy profiles of remnants like GS/E decline towards the center and may
James M. M. Lane, Jo Bovy
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The Astrophysical JournalWe examine various physical processes that may explain the shallow high-mass slope of the initial mass function (IMF), as well as the low star formation rate (SFR) in star-forming molecular clouds (MCs) in the Central Molecular Zone (CMZ).
Gilles Chabrier, Pierre Dumond
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Overview of the DESI Milky Way Survey
The Astrophysical Journal, 2023 We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory.
Andrew P. Cooper +64 more
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The mass of the Milky Way Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 1992 We present a method for determining the Galactic mass and mass distribution based on maximum likelihood parameter estimation. We show that the number density of the Galaxy's outer satellites can be modelled by a power-law function. Assuming that the total distribution of matter (visible and dark) can be modelled in a similar way, we construct a self ...
Andrew S. Kulessa, D. Lynden-Bell
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